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Apatite

Apatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ion, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca10(PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as…

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Birefringence
0.002–0.008
Category
Phosphate mineral
Cleavage
indistinct, indistinct
Color
Transparent to translucent, usually green, less often colorless, yellow, blue to violet, pink, brown.
Crystal class
Dipyramidal (6/m) (same H-M symbol)
Crystal habit
Tabular, prismatic crystals, massive, compact or granular

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Overview

Geology

Uses

Thermodynamics

Lunar science

Bio-leaching

Apatite group and supergroup

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Apatite

Nodes124
Edges123
Triples98
Avg. degree1.98
Density0.016129
Components1

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Apatite

Top relations

related to Gemology · 19
Apatite → Brazil, Canada, Chatoyant, Czech Republic, Germany, If, India, Madagascar, Major, Mexico, Mozambique, Myanmar, Norway, Other, South Africa, Spain, Sri Lanka, Transparent, United States
related to Thermodynamics · 15
Apatite → Born-Huggins-Mayer, Br, BrAp, Ca10, Cl, ClAp, Cruz, High-pressure, HOAp, OH, Parsafar-Mason, PO4, Speculations, Structural, The
related to Uses · 8
Apatite → BCE China, During, Ground, It, Qing, Terracotta Army, The, This
related to Geology · 7
Apatite → Coarsely, Economic, However, It, Its, Mohs, Phosphorite
related to Use as an ore mineral · 6
Apatite → Apatity, Arctic North, However, Russia, The, This
related to Lunar science · 5
Apatite → Apollo, Following, If, Moon, Moon's
related to Bio-leaching · 4
Apatite → Paxillus, Release, Suillus, The
is a · 3
Apatite → defining mineral for 5 on the Mohs scale, group of phosphate minerals, ore mineral at the Hoidas Lake rare-earth project
related to Apatite group and supergroup · 3
Apatite → Apatites, More, Those
Birefringence · 1
Apatite → 0.002–0.008

Important terminology Word statistics

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Important terminology

minerals mineral hydroxyapatite crystal phosphate also oh cl fluoride fluorapatite calcium apatites often transparent used po4 usually blue bone group

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ApatiteBirefringence0.002–0.0081.00infobox
ApatiteCategoryPhosphate mineral1.00infobox
ApatiteCleavageindistinct, indistinct1.00infobox
ApatiteColorTransparent to translucent, usually green, less often colorless, yellow, blue to violet, pink, brown.1.00infobox
ApatiteCrystal classDipyramidal (6/m) (same H-M symbol)1.00infobox
ApatiteCrystal habitTabular, prismatic crystals, massive, compact or granular1.00infobox
ApatiteCrystal systemHexagonal1.00infobox
ApatiteDiaphaneityTransparent to translucent1.00infobox
ApatiteDispersion0.0131.00infobox
ApatiteFormulaCa5(PO4)3(F,Cl,OH)1.00infobox
ApatiteFractureConchoidal to uneven1.00infobox
ApatiteIMA symbolAp1.00infobox
ApatiteLusterVitreous to subresinous1.00infobox
ApatiteMohs scale hardness5 (defining mineral)1.00infobox
ApatiteOptical propertiesDouble refractive, uniaxial negative1.00infobox
ApatitePleochroismBlue stones – strong, blue and yellow to colorless. Other colors are weak to very weak.1.00infobox
ApatitePolish lusterVitreous1.00infobox
ApatiteRefractive index1.634–1.638 (+0.012, −0.006)1.00infobox
ApatiteSpace groupP63/m (no. 176)1.00infobox
ApatiteSpecific gravity3.16–3.221.00infobox
ApatiteStreakWhite1.00infobox
ApatiteStrunz classification8.BN.051.00infobox
ApatiteUltraviolet fluorescenceYellow stones – purplish-pink, which is stronger in long wave; blue stones – blue to light-blue in both long and short wave; green stones – greenish-yellow, which is stronger in…1.00infobox
Apatiteis agroup of phosphate minerals0.90text
Apatiteis adefining mineral for 5 on the Mohs scale0.90text
Apatiteis aore mineral at the Hoidas Lake rare-earth project0.90text

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