Mineral phase
IMA name
Sylvite
CAS number
7447-40-7
Type
Class
non-silicate mineral
Compound type
halide
Chemical composition
Formula
$KCl$
Chemical formula
KCl
Elemental formula
(K+) (Cl-)
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$K^+$ Potassium(1+) cation element 1 constituent cation main
$Cl^-$ Chloride anion element 1 constituent anion main
Composition comments
common impurities: Br,CO2
Oxides
Formula $K_{2}O$ $Cl$
Mass fraction (%) 63.18 47.55
Oxides comments
-10.73 % -O=Cl2

Strunz

Class
halides (03)
Division
simple halides, without H2O (03.A)
Family
M:X = 1:1, 2:3, 3:5, etc. (03.AA)
Code
03.AA.20

Dana

Major class
halides (IV)
Class
anhydrous and hydrated halides (09)
Type
where AX (09.01)
Group
Halite group (09.01.01)
Code
09.01.01.02
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
74.55 $g/mol$
Density
1.99 $g/cm^3$
State NTP
solid
Refringence type
isotropic
Refraction index $n_{\alpha}$
1.49
Pure color
colorless
Color
white, yellowish white, reddish white, bluish white, brownish white
Diaphaneity
transparent to translucent
Luster
vitreous
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