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Charoite

Charoite (/tʃæroʊ.aɪt/ CHAR-ow-ait) is a rare silicate mineral with the chemical composition K(Ca,Na)2Si4O10(OH,F)•H2O, first described in 1978. It is named after the Chara River, despite its being 70 kilometres (43 mi) away from the discovery place. When it was discovered, it was thought to be a fake, dyed purple to give it its striking appearance.

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Birefringence
0.009
Category
Silicate mineral
Cleavage
Good in three directions
Color
Violet, lilac, light brown
Common impurities
Al, Fe, Mn, Sr, Ba
Crystal class
Prismatic (2/m) (same H-M symbol)

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Charoite

Nodes28
Edges27
Triples47
Avg. degree1.93
Density0.071429
Components1

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Charoite

Top relations

related to Properties · 11
Charoite → Charoite's, Gamma Ray American Petroleum, Inclusions, Institute Units, It, Larger, Lighter, Sometimes, Sugilites, The, Though
related to Occurrences · 9
Charoite → Aldan Shield, Charoitite, Common, It, Murun Massif, Russia, Sakha Republic, Siberia, Tinaksite
related to Gallery · 6
Charoite → Charoitite, Geological Service, Mining, Photo, Russia, Years
Birefringence · 1
Charoite → 0.009
Category · 1
Charoite → Silicate mineral
Cleavage · 1
Charoite → Good in three directions
Color · 1
Charoite → Violet, lilac, light brown
Common impurities · 1
Charoite → Al, Fe, Mn, Sr, Ba
Crystal class · 1
Charoite → Prismatic (2/m) (same H-M symbol)
Crystal habit · 1
Charoite → Fibrous, massive

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Important terminology

mineral 10 properties discovered purple feldspar color fibrous white translucent common silicate ca na 2si 4o oh 2o references black

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CharoiteBirefringence0.0091.00infobox
CharoiteCategorySilicate mineral1.00infobox
CharoiteCleavageGood in three directions1.00infobox
CharoiteColorViolet, lilac, light brown1.00infobox
CharoiteCommon impuritiesAl, Fe, Mn, Sr, Ba1.00infobox
CharoiteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
CharoiteCrystal habitFibrous, massive1.00infobox
CharoiteCrystal systemMonoclinic1.00infobox
CharoiteDiaphaneityTranslucent1.00infobox
CharoiteFormulaK(Ca,Na) 2Si 4O 10(OH,F)•H 2O1.00infobox
CharoiteFractureConchoidal1.00infobox
CharoiteIMA symbolCha1.00infobox
CharoiteLusterVitreous to pearly1.00infobox
CharoiteMohs scale hardness5 - 61.00infobox
CharoiteOptical propertiesBiaxial (+)1.00infobox
CharoiteOther characteristicsRadioactive 10.69% (K)1.00infobox
CharoiteRefractive indexnα = 1.550 nβ = 1.553 nγ = 1.5591.00infobox
CharoiteSpace groupP21/m1.00infobox
CharoiteSpecific gravity2.54 - 2.581.00infobox
CharoiteStreakWhite1.00infobox
CharoiteUltraviolet fluorescenceWeakly fluorescent1.00infobox

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