Mineral phase
IMA name
Fluorite
Secondary names
Fluor Spar; Calcium fluoride
CAS number
7789-75-5
Type
Class
non-silicate mineral
Compound type
fluoride
Chemical composition
Formula
$CaF_2$
Chemical formula
CaF2
Elemental formula
(Ca2+) (F-)2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Ca^{2+}$ Calcium cation element 1 constituent element main
$F^-$ Fluoride anion element 2 constituent element main
Oxides
Formula $CaO$ $F$
Mass fraction (%) 71.83 48.67
Oxides comments
-20.49 % -O=F2

Strunz

Class
halides (03)
Division
simple halides, without H2O (03.A)
Family
M:X = 1:2 (03.AB)
Code
03.AB.25

Dana

Major class
halides (IV)
Class
anhydrous and hydrated halides (09)
Type
where A(X)2 (09.02)
Group
Fluorite group (09.02.01)
Code
09.02.01.01
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Crystal sites
Label Nb Type Wp Specie Specie coordinence Specie occupancy Specie oxidation state
Ca 1 main  $Ca^{2+}$ cubic VIII 1.0 2
F 2 main  $F^-$ tetrahedral IV 1.0
Molar mass
78.07 $g/mol$
Density
3.01 - 3.25 $g/cm^3$
State NTP
solid
Refringence type
isotropic
Refringence sign
no
Refraction index $n_{\alpha}$
1.433
Color
white, yellow, green, red, blue
Diaphaneity
transparent to subtranslucent
Luster
vitreous
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