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Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed mostly of…

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Birefringence
δ = 0.154–0.174
Category
Carbonate mineral
Cleavage
Perfect on {1011} three directions with angle of 74° 55'
Color
Typically colorless or creamy white - may have shades of brownish colors
Crystal class
Hexagonal scalenohedral (3m) H-M symbol: (3 2/m)
Crystal habit
Botryoidal, concretionary, druse, globular, granular, massive, rhombohedral, scalenohedral, stalactitic

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Overview

Etymology

Unit cell and Miller indices

Properties

Distribution

Use and applications

Natural occurrence

Formation processes

In Earth history

Climate change

Gallery

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Calcite

Nodes187
Edges186
Triples205
Avg. degree1.99
Density0.010695
Components1

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Calcite

Top relations

related to Thermoluminescence · 25
Calcite → Ag, An, Bi, Bi3, By, Co, Co2, Cu, Cu2, Fe, Fe2, Fe3, However, Measuring, Mineral, Mn, Mn2, Ni, Ni2, Observing
related to Gallery · 20
Calcite → Agrigento, Carmel Formation, China, Durango, Echinosphaerites, Estonia, Its, José María Patoni, Mexico, Middle Jurassic, Middle Ordovician, Rhombohedrons, Río, San Juan, Several, SicilyReddish, South Dakota, USA, USACalcite, Utah
related to Further reading · 12
Calcite → Bibcode, France, Giresse, June, Karl-Erich, Micro-environmental, Pierre, Quaternary, Roussillon, S2CID, Schmittner, Sedimentology
related to Optical · 11
Calcite → Acute, At, Between, Danish, Iceland, Icelandic Sagas, Rasmus Bartholin, Single, The, This, Viking
related to Unit cell and Miller indices · 11
Calcite → As, Bravais, For, In, Later, Miller, One, The, To, Twinning, X-ray
related to history · 9
Calcite → Earth's, Form, Interaction, Jurassic, Lineages, Ordovician, Petrographic, Phanerozoic, The
related to Climate change · 8
Calcite → As, Calcifying, Climate, CO2, Gt, If, Meanwhile, The
related to Crystal habits · 8
Calcite → Cleavage, D-amino, Habits, It, Its, Most, Rhombohedral, Scalenohedral
has application · 7
Calcite → Ancient Egyptians, Bast, By, Iceland, Identifying, Many, Vikings
related to United States · 6
Calcite → Calcite Quarry, Large, Michigan, One, The Calcite Quarry, United States

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Important terminology

used also mineral carbonate rhombohedral form crystal vaterite may crystals calcium aragonite optical ph limestone unit cell due hexagonal cleavage

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CalciteBirefringenceδ = 0.154–0.1741.00infobox
CalciteCategoryCarbonate mineral1.00infobox
CalciteCleavagePerfect on {1011} three directions with angle of 74° 55'1.00infobox
CalciteColorTypically colorless or creamy white - may have shades of brownish colors1.00infobox
CalciteCrystal classHexagonal scalenohedral (3m) H-M symbol: (3 2/m)1.00infobox
CalciteCrystal habitBotryoidal, concretionary, druse, globular, granular, massive, rhombohedral, scalenohedral, stalactitic1.00infobox
CalciteCrystal systemTrigonal1.00infobox
CalciteDiaphaneityTransparent to translucent1.00infobox
CalciteFormulaCaCO31.00infobox
CalciteFractureConchoidal1.00infobox
CalciteFusibilityInfusible (decrepitates energetically)1.00infobox
CalciteIMA symbolCal1.00infobox
CalciteLusterVitreous to pearly on cleavage surfaces1.00infobox
CalciteMohs scale hardness3 (defining mineral)1.00infobox
CalciteOptical propertiesUniaxial (−); low relief1.00infobox
CalciteOther characteristicsMay fluoresce red, blue, yellow, and other colors under either SW and LW UV; phosphorescent1.00infobox
CalciteRefractive indexnω = 1.640–1.660 nε = 1.4861.00infobox
CalciteSolubilitySoluble in dilute acids1.00infobox
CalciteSpace groupR3c1.00infobox
CalciteSpecific gravity2.711.00infobox
CalciteStreakWhite1.00infobox
CalciteStrunz classification5.AB.051.00infobox
CalciteTenacityBrittle1.00infobox
CalciteTwinningCommon by four twin laws1.00infobox
CalciteUnit cella = 4.9896(2) Å, c = 17.0610(11) Å; Z = 61.00infobox
Calciteis acarbonate mineral and the most stable polymorph of calcium carbonate0.90text
Calciteis apreferred material to be used as a scaffold in bone tissue engineering due to its controllable and repeatable properties.Calcite can be used to alleviate water pollution caused…0.90text

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