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Minerals - Chlorapatite | TerraCollect

Mineral - Chlorapatite

ChlorapatiteCa₅(PO₄)₃Cl

Chemical Properties

Mineral Class

Phosphates

Toxicity

none

Formula

Ca₅(PO₄)₃Cl

Unit Cell

a=9.60 c=6.78 Z=2

Physical Properties

Hardness

5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

white

Birefringence

0.008

Luster

Vitreous,

Resinous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

hexagonal

Point Group

Composition

Elements

Mass

P₂O₅

41.20

CaO

53.40

F

0.48

Cl

7.20

H₂O

0.09

Kanada

Groups and Members

Apatite-Supergroup

Apatite-Group

Cleavage

Undeutlich auf (0001) und (1010)

Fracture

conchoidal,

uneven

Tenacity

Brittle

hexagonal-dipyramidal - 6/m

Space Group

P63/m (176)

Habit

blocky, massive, prismatic

Formation

By metamorphism in calc-silicate rock, magmatic in mafic intrusions, secondary as a substitute product of triphylite in granitic pegmatites

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Chlorapatite