My name is Derrick. Just as crystals have a set shape, the framework of these crystals is called a lattice. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. These planes of relative weakness are a result of the regular locations of atoms and ions in the crystal, which create smooth repeating surfaces that are visible both in the microscope and to the naked eye. I heard about Jason s personal training from a friend at and was eager to give him a try.I was impressed with his knowledge of the body and nutrition.After completing a 7 week program that entertained functional muscle movements and strict nutritional guidelines I was able to achieve the ultimate results. 17. It has been found that triangular lattices are the strongest when it comes to supporting weight, so triangular lattice forms the base of many big architectures. Examples of this lattice structure are topaz, iolite, zoisite, etc. Arsenic is a chemical element with the symbol As and atomic number 33. Which is based on fitness assessment, fitness goals, and body type. If x=-1/6, the crystal would be BCC. Were others have failed, Jason came through. However, the bonds are mostly covalent in nature. Iron(II) oxide makes up approximately 9% of the Earth's mantle. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal.Arsenic is a metalloid.It has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.. Zinc atoms are stacked in hexagonal layers and closest to each other, making a Hexagonal Closest Packed (HCP) lattice structure. Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3.It has the same crystal structure as corundum (Al 2 O 3) and ilmenite (FeTiO 3).With this it forms The origin of these high coercivity values has been interpreted as a consequence of the subparticle structure induced by the different particle and crystallite size growth rates at increasing annealing temperature. However, the bonds are mostly covalent in nature. I was so happy to find a personal trainer who listened and gave professional, knowledgeable fitness advice tailored to my needs. Energ Environ Sci, 4, 3640, (2011)IF~33.250. Some rocks, such as limestone or quartzite, are composed primarily of one mineral calcite or aragonite in the case of limestone, and quartz in the latter case. A rhombohedral crystal structure is any that fits into a rhombohedral Bravais lattice, or in space groups #146, 148, 155, 160, 161, 166, or 167. However, at higher temperatures (6001000C), the growth of crystalline aggregates and a subparticle structure is favored. Bridges are made using the lattice structure. Our personal training gyms and private studios are located all over Manhattan. I completed an 8-week total body makeover with Jason to get ready for a photo shoot in Miami,His workouts were upbeat and motivating. If you plan to spend time and effort to become a better person than you were yesterday, join our team and learn under the best personal training experts today - go to Researchems! Im Beth from West Manhattan,NY. These differences in the growth rates are translated into a progressive development of a subparticle structure at the nanoscale. The unit cell of this system is basically a three-sided pyramid. X. Shi, C. Sun, Z. Bu, X. Zhang, Y. Wu, S. Lin, W. Li, F. Alireza, J.Anubhav andY. Backed by some of the leading, certified personal trainers in Manhattan, we bring you a complete platform where you can race yourself to your fitness goals. These planes of relative weakness are a result of the regular locations of atoms and ions in the crystal, which create smooth repeating surfaces that are visible both in the microscope and to the naked eye. If you dont have those values memorized, you should go back and read my article about APF! Hope you'll find our explanations and tips useful! Z. Chen, B. Ge, W. Li, S. Lin, J. Shen, Y. Chang, R. Hanus, G. J. Snyder* andY. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. msestudent is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. M. Jin, S. Lin*, W. Li, Z. Chen, R. Li, X. Wang, Y. Chen andY. A lattice system is a set of Bravais lattices. Notably, the corresponding high-resolution TEM (HRTEM) image of V 2 O 3 /VN-2 exhibits well-defined lattice fringes, and a lattice plane distance of 0.247 nm along different directions, which was indexed to the (110) or (1 0) facet of the rhombohedral V 2 O 3 phase (PDF #71-0280). Hematite (/ h i m t a t, h m -/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. Hi, Im Benny from Manhattan,NY. Pei* and G. J. Snyder*. Below is a Desmos graph that plots APF in terms of the vector angle . Originally, it was made from tailings of the Falu mine. Under standard conditions, it is the lightest metal and the lightest solid element. If bonds in certain directions are Energ Environ Sci 5, 7963 (2012)IF~33.250. Under standard conditions, it is the lightest metal and the lightest solid element. Chemistry uses lattice to describe the structure of molecules. Jasons health, personal training knowledge, and nutritional advice changed my life and i lost 60lb in 18 weeks. Z. Chen, X. Zhang, S. Lin, L. Chen* andY. Pei*. With some of the industrys leading fitness trainers, Hard Bodies Personal Training has managed to become the center of attention for those who have the drive to stay fit! In analogy, when the centred face cuts the Y or Zaxis, we have B- or C-centring respectively.[3]. Thanks to him I finally have the body I deserve. To identify a unit cell of a crystalline structure, the following parameters are considered. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal.Arsenic is a metalloid.It has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.. Number of In amethyst geodes it is often most intense in the growth zones under the rhombohedral faces. The chemical symbol for Hydrogen is H.. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. They keep me in shape and toned.He personalizes each work out to target different parts of my body such as arm, legs, core, and back. It is a rock-forming mineral.It is a naturally transparent material, but can have different colors depending on the presence of transition metal impurities in its crystalline structure. [23], Hematite was once used as mourning jewelry. [21] Several other sites also showed hematite, such as Aureum Chaos. In this arrangement, the constituent lattice points hold the corner positions only. Crystal systems that have space groups assigned to a common lattice Hematite (/ h i m t a t, h m -/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. . For example, both the NaCl structure (space group Fm 3 m) and diamond (space group Fd 3 m) have the same Pearson symbol cF8. I found Jason after several failures with other personal trainers. In the hexagonal family, the crystal is conventionally described by a right rhombic prism unit cell with two equal axes (a by a), an included angle of 120 () and a height (c, which can be different from a) perpendicular to the two base axes.. Each snowflake is different in the way that its crystalline structure is unique. 9. Kievlenko (1980), updated, "Researchers find earliest evidence for modern human behavior in South Africa", "Iron Oxides Prehistoric Mines: A European Overview", "Anisotropic Superexchange Interaction and Weak Ferromagnetism", "Mars Global Surveyor TES Instrument Identification of Hematite on Mars", "Formation of the hematite-bearing unit in Meridiani Planum: Evidence for deposition in standing water", "Geologic and mineralogic mapping of Aram Chaos: Evidence for a water-rich history", "A Newly Discovered Hematite-Rich Unit in Aureum Chaos: Comparison of Hematite and Associated Units With Those in Aram Chaos", https://en.wikipedia.org/w/index.php?title=Hematite&oldid=1119508444, Articles containing Ancient Greek (to 1453)-language text, Creative Commons Attribution-ShareAlike License 3.0, Metallic grey, dull to bright "rust-red" in earthy, compact, fine-grained material, steel-grey to black in crystals and massively crystalline ores, Tabular to thick crystals; micaceous or platy, commonly in rosettes; radiating fibrous, reniform, botryoidal or stalactitic masses, columnar; earthy, granular, oolitic, None, may show partings on {0001} and {10, This page was last edited on 1 November 2022, at 23:34. Two of the electrons are in the s subshell, with 3 unpaired electrons in the p subshell. Therefore, in the solid phase, the copper centers/habitats metallic bonds Cu Cu to create polymeric copper chains. In this crystalline structure, there are three axes. Examples of this lattice structure are topaz, iolite, zoisite, etc. Pei*, Rationalizing Phonon Dispersion for Lattice Thermal Conductivity of Solids, National Science Review, 5888, (2018). The plane is shown by the red spheres at the vertices and the copper sphere in the center. Are lattice structures used in everyday life? Micaceous hematite taken with permission from Kelly's Mine, Lustleigh, Devon UK, This article is about the mineral. The chemical symbol for Hydrogen is H.. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. The significant and distinct geometrical shape of a unit cell defines the type of crystal lattice. I have always dreamed of becoming a fitness icon. Energ Environ Sci 4, 2090, (2011). Ans: Copper (II) nitrate is a decent producer of ionic copper for some reactions, particularly those wherein it catalyzes organic reactions. Resorcinol Formula - Meaning, Production, Applications and FAQs, Empirical Formula - Meaning, Examples, Statistics and FAQs, Caffeine Chemical Formula - Meaning, Properties and FAQs, Molecular Weight Formula - Meaning, Calculation and Solved Examples, Degree of Unsaturation Formula - Meaning, Solved Examples and FAQs, Lead IV Oxide Formula - Structure, Production, Properties and Example. Examples of this lattice structure are topaz, iolite, zoisite, etc. Face-Centered Orthorhombic11. 2. Graphite (/ r f a t /) is a crystalline form of the element carbon.It consists of stacked layers of graphene.Graphite occurs naturally and is the most stable form of carbon under standard conditions.Synthetic and natural graphite are consumed on large scale (300 kton/y ea, in 1989) for uses in pencils, lubricants, and electrodes.Under high pressures and temperatures it Number of When CaCO 3 overgrowth experiments were performed, the bare round glass coverslip was replaced with a round glass coverslip with its surface covered mainly by rhombohedral calcite crystals (Fig. Jasons expertise in his field was unparalleled. 11. The cupric nitrate is a glistening and attractive colour blue-green inorganic salt. Crystal structure induced ultra-low lattice thermal conductivity in thermoelectric Ag9AlSe6. Hematite exhibited temperature-dependent magnetic coercivity values ranging from 289to 5,027 oersteds (23400kA/m). 5). I feel great and have more energy than ever before. It means that one atom is directly in contact with eight other atoms or lattice points. The atomic levels are closely packed, creating a hexagonal closest packed (HCP) lattice structure. It is slightly distorted from the HCP structure due to the difference between neighbouring and group atoms. It can also attend to shapes like rhombohedral and scalenohedral. It is a soft, silvery-white alkali metal. Occasionally the color is deeper under either the r or z rhombohedral faces, giving the crystal a pinwheel appearence when viewed from the top. In this crystalline structure, there are three axes. The Close-Packed Rhombohedral (abbreviated CPR in this article) is more commonly known as the Samarium-type crystal, because Sm is the first element to display this crystal structure. O. 2022 Copyright Materials Science & Engineering Student, link to Close-Packed Rhombohedral (Sm-type) Unit Cell, link to What Are Bravais Lattices? "[7] Certain types of hematite- or iron-oxide-rich clay, especially Armenian bole, have been used in gilding. so if you want a full explanation of APF, check out this page. After battling my weight for over 20 years, I finally achieved the ultimate weight loss. However, this article will focus on the simple or primitive rhombohedral unit cell, which has a single atom at each lattice point on a rhombohedron, abbreviated as SR for this article Hematine is a synthetic material sold as magnetic hematite. The Simple Rhombohedral (SR), or primitive rhombohedral unit cell, is an unusual way that atoms can be arranged in solids. Realizing the high thermoelectric performance of GeTe by Sb-doping and Se-alloying. turns blue. Simple Rhombohedral is one of these 14 Bravais lattices and also occurs as a crystal structure. The principal use of ochre is for tinting with a permanent color. In this type, the unit cell is shaped like a cube. Nautical lattices are a part of geometric designs used in fabrics or buildings. W. Li, S. Lin, X. Zhang, Z. Chen, X. Xu andY. Sun, J. Yang* andY. 1.Y. Wechsler B A , Prewitt C T , American Mineralogist , 69 (1984) p.176-185, Crystal structure of ilmenite (FeTiO3) at high temperature and high pressure, 24 deg C View Additional jPOWD Structure files for Ilmenite Pei*, Efficient Sc-Dopped Mg3.05-xScxSbBi Thermoelectrics Near Room Temperature, 30. What is the shape of the zinc crystal structure? Body-Centered Cubic4. Pei*, Extraordinary n-Mg3SbBi Thermoelectrics Enabled by Yttrium Doping, Adv Mater,31,1903387, (2019).Cover article, IF~25.809, 28. 2 Pei*, A. D. LaLonde and G. J. Snyder*. Only the main axis varies in dimension. ions gives it a characteristic crystallinity of ionic compounds (orthorhombic structure for anhydrous salt and rhombohedral for hydrated salts). 5. The color in amethyst from most localities is unevenly distributed in the individual crystals. Corundum is a crystalline form of aluminium oxide (Al 2 O 3) typically containing traces of iron, titanium, vanadium and chromium. Each type possesses a specific shape and different Biology uses lattices to represent structures of DNA or protein. I would recommend Jason to anyone! 2, Pergamon Press, Oxford, 1967. A recently developed process, magnetation, uses magnets to glean waste hematite from old mine tailings in Minnesota's vast Mesabi Range iron district. SR is rare because it is asymmetrical and has a low coordination number and low packing factor. At this moment, =60 and we actually have an FCC primitive unit cell. The superposed atoms or lattice points create gaps where the underlying plane can fit into the upper one. I worked with him for 16 weeks and lost 48lbs. -polonium (with Strukturbericht Ai) is rhombohedral with an angle between that of BCC and SC, while -mercury (with Strukturbericht A10) is rhombohedral with an angle between that of SC and FCC. 3.Y. J. Li, X. Zhang, Z. Chen, S. Lin, W. Li, J. Shen, IT Witting, A. Faghaninia, Y. Chen, A. Jain, L. Chen, GJ Snyder andY. W. Li, L. Zheng, B. Ge, S. Lin, X. Zhang, Z. Chen, Y. Chang andY. If youre searching for information about rhombohedral crystal cells, Im assuming youre a somewhat advanced student in materials science, so Ill give you the facts quickly and with little explanation. Automatically add additional atoms to the structure based on the specified centering type: P I F A B C R. Use monoclinic settings with axes a(b)c c(-b)a ab(c) ba(-c) (a)bc (-a)cb Use monoclinic settings with cell choice 1 2 3 Use orthorhombic settings with axes abc ba-c cab-cba bca a-cb Use settings with origin choice 1 2 Use settings with hexagonal rhombohedral axes. Hematite is an antiferromagnetic material below the Morin transition at 250K (23C), and a canted antiferromagnet or weakly ferromagnetic above the Morin transition and below its Nel temperature at 948K (675C), above which it is paramagnetic. Jasons personal training routine and extensive nutritional guides brought me unbelievable results. Simple Hexagonal4a. Pearson. Im Grace from New York City. Based on their inclination angles, the shape of the crystals varies. I began working with Jason as a New Years resolution and by May I lost 56 lbs.Thanks to Jasons amazing nutritional strategies, innovative exercise programs and cardiovascular routines I was able to achieve the body I always wanted. Through working with Jason I have successfully overcome many of the negative effects of my disease. Simple Tetragonal7. If you follow the description of the FCC BCC HCP crystal structure, you will find out how the copper atoms are stacked to form these unique FCC unit cells. Square lattice designs form the base of wire fences. With Healthy lifestyle and a balance of proper exercise. In a unit cell of a crystal structure, every ion, atom, or molecule represents a point in a 3D space. span.s2_0_{FONT-SIZE: 18pt;FONT-FAMILY: ;COLOR: #ffffff;LETTER-SPACING: 3px;LINE-HEIGHT: 160%;BACKGROUND-COLOR: #2bd5d5;}
The unit cell of this system is basically a three-sided pyramid. (Highlighted by: J. M. Crow,ChemistryWorld) IF~15.621. My highest recommendation goes out to Jason. . If youre interested in advanced crystallography or crystallography databases, you may want to check out the AFLOW crystallographic library. His fitness routines are invigorating and fun. Graphite (/ r f a t /) is a crystalline form of the element carbon.It consists of stacked layers of graphene.Graphite occurs naturally and is the most stable form of carbon under standard conditions.Synthetic and natural graphite are consumed on large scale (300 kton/y ea, in 1989) for uses in pencils, lubricants, and electrodes.Under high pressures and temperatures it However, the bonds are mostly covalent in nature. Z. Chen, Z. Jian, W. Li, Y. Chang, B. Ge, R. Hanus, J. Yang, Y. Chen, M. Huang, G. J. Snyder andY. NPG Asia Mater 9, e08 (2017)(Invited paper) IF~. Hi, my name is Amy. . I trained for hours and days on end without the results I was looking for.After training with Jason for just 16 weeks I can finally say Ive reached a life time goal. It means all the constituent particles in that unit can be considered points. The Pearson symbol should only be used to designate simple structures (elements, some binary compound) where the number of atoms per unit cell equals, ideally, the number of translationally equivalent points. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral Pei*. ; As you move down the nitrogen family: atomic radius increases, ionic radius increases, ionization energy decreases, and electronegativity decreases. Pei*. Body-Centred Cubic (BCC) Lattice structure. It is an uncommon crystal structure. ACS Energy Letters, 2, 2349, (2017)Cover article, IF~16.331. However, the structure formation occurs in the following manner: Also, there is a geometrical structure of the chemical formula for copper nitrate, which is as follows: Now, lets understand the structure in words: A synthesis and reaction for copper nitrate aqueous solution of copper (II) nitrate occur in the following way: Hydrated copper nitrate (cupric nitrate) formation occurs by hydration of the anhydrous material or by treating copper metal with an aqueous solution of silver nitrate or concentrated nitric acid (HNO3): Cu (s) + 4 HNO3 (l) Cu(NO3)2 (s) + 2 H2O (l) + 2 NO2 (g), Copper metal Nitric Acid Copper II Nitrate Water Nitrogen Dioxide. The examples are beryl, apatite, etc. Space groups are classified into crystal systems according to their point groups, and into lattice systems according to their Bravais lattices. Now, the lattice parameter is exactly . Hard Bodies Personal Training home of the best personal trainers in NYC and top fitness boot camps in New York City. Interstitial Defects Improving Thermoelectric SnTe in Addition to Band Convergence. If bonds in certain directions are Adv Energy Materials, 2, 670, (2012)IF~24.884. Occurrence in nature. [1] The symbol is made up of two letters followed by a number. Although Calcite and Aragonite contain the same chemical composition, they differ in crystal structure. Our personal trainers in the Financial District build a one of a kind program for each of their clients. Diamond Cubic3. Confusion also arises in the rhombohedral lattice, which is alternatively described in a centred hexagonal (a = b, c, = = 90, = 120) or primitive rhombohedral (a = b = c, = = ) setting. The gas-phase interactions are very weak because of the electrostatic repulsions between the NO3 groups. The coordination number of this crystal structure is 12. The stable tetrahydrate was originally reported to be rhombohedral but is now believed to be monoclinic. If bonds in certain directions are 3H2O. The third layer, on the contrary, lies in the free gaps. Highlighted byJoule(), 26. All other lattices can simplify into one of the Bravais lattices. If you wanted to describe the simple rhombohedral crystal with math, you would describe the cell with the vectorsif(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'msestudent_com-large-leaderboard-2','ezslot_6',124,'0','0'])};__ez_fad_position('div-gpt-ad-msestudent_com-large-leaderboard-2-0'); Where x relates the distortion away from cubic. Introduction On this basis there are seven different possible combinations of a, b, and c, and , , and , each of which represents a distinct crystal system. . (If youre curious =109.471 is BCC). The study of crystals is called Crystallography. Wechsler B A , Prewitt C T , American Mineralogist , 69 (1984) p.176-185, Crystal structure of ilmenite (FeTiO3) at high temperature and high pressure, 24 deg C View Additional jPOWD Structure files for Ilmenite The powdery mineral was first used 164,000 years ago by the Pinnacle-Point man, possibly for social purposes. Ive always wanted to be in shape and could never escape the pressure to look my best. Diamonds and rubies are the most popular and precious crystals available. X. Shi, C. Sun, X. Zhang, Z. Chen, S. Lin, W. Li andY. Xu, H. Jiang,Y. The simple rhombohedral unit cell belongs to space group #166 or , Strukturbericht Ai or A10 (depending on the rhombohedral angles), and Pearson symbol hR1. Calcium is a chemical element with the symbol Ca and atomic number 20. However, the bonds are mostly covalent in nature. The Pearson symbol, or Pearson notation, is used in crystallography as a means of describing a crystal structure, and was originated by W.B. 18. IF~16.331. In this arrangement, the particles occupy the centre along with the corner positions. In this type, the unit cell is shaped like a cube. Adv Energy Mater, 8, 1800030, (2018).IF~24.884. X. Zhang, Z. Chen, S. Lin, B. Zhou, B. Gao andY. span.s1_0_{FONT-SIZE: 18pt;FONT-FAMILY: _GB2312;COLOR: #ffffff;LETTER-SPACING: 3px;LINE-HEIGHT: 160%;BACKGROUND-COLOR: #2bd5d5;}
Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3.It has the same crystal structure as corundum (Al 2 O 3) and ilmenite (FeTiO 3).With this it forms Promoting SnTe as an eco-friendly solution for p-PbTe thermoelectric. For example, the Morin transition temperature of hematite decreases with a decrease in the particle size. Other articles in my crystallography series include: Introduction to Bravais LatticesWhat is the Difference Between Crystal Structure and Bravais LatticeAtomic Packing FactorHow to Read Miller IndicesHow to Read Hexagonal Miller-Bravais IndicesClose-Packed Crystals and Stacking OrderInterstitial SitesPrimitive CellsHow to Read Crystallography Notation What are Point GroupsList of Point GroupsWhat are Space GroupsList of Space GroupsThe 7 Crystal Systems, Close-Packed Rhombohedral (Sm-type) Unit Cell. Stabilizing the Optimal Carrier Concentration for High Thermoelectric Efficiency. In amethyst geodes it is often most intense in the growth zones under the rhombohedral faces. Pei*. I was diagnosed with Diabetes years ago mostly due to my poor nutrition and lack of exercise. (Cover Articleand Highlighted byScience) IF~33.250. It is this orderly arrangement of the constituent particles that gives all types of crystals a straight edge and flat surface. In-situ investigations by the Opportunity rover showed a significant amount of hematite, much of it in the form of small "Martian spherules" that were informally named "blueberries" by the science team. Weak Electron-Phonon Coupling Contributing to High Thermoelectric Performance in n-Type PbSe, PNAS 109, 9705 (2012)(Highlights of the issue) IF~9.504. H2O). All members of the calcite group crystallize in the trigonal system, have perfect rhombohedral cleavage, and exhibit strong double refraction in transparent rhombohedrons. Crystal structure induced ultra-low lattice thermal conductivity in thermoelectric Ag9AlSe6, Adv Energy Mater, 8, 1800030, (2018).IF~24.884. Low-symmetry Rhombohedral GeTe thermoelectrics. 7. In the hexagonal family, the crystal is conventionally described by a right rhombic prism unit cell with two equal axes (a by a), an included angle of 120 () and a height (c, which can be different from a) perpendicular to the two base axes.. If x= 0, the crystal would be SC. Hematite (/ h i m t a t, h m -/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. I also found one paper that found a SR phase in lithiumit was essentially the FCC phase, but with a 7% shrinkage along one of the body diagonals, and expansion in the other directions. When held up to the light, it creates a rainbow prism effect, thus distinguishing it from glass. Monday Friday6:00 a.m. 10 p.m.Saturday & Sunday8 a.m. 5 p.m. Self-tuning the Carrier Concentration of PbTe/Ag2Te Composites with Excess Ag for High Thermoelectric Performance. Graphein means to write. 5). Calcite and Aragonite are polymorphous to each other. As the lightest element of the boron group it has three valence electrons for forming covalent bonds, resulting in many compounds such as boric acid, the mineral sodium borate, and the ultra-hard crystals of People with good spatial understanding and orientation can figure out directions and routes. 4 Lattice parameters of crystal structure. Nitrogen family elements consists of atoms having 5 electrons in their outer energy level.
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