Constituent
Name
KBr
Official name
Potassium bromide
Family
ionic solid
Class
normal salt
Compound type
bromide
Comments
Not recognized as mineral species. Natural Potassium bromide is regarded as very very unlikely
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Mole fraction
1.0
Abundance comments
impurities: Cl < 0.1%, Na < 0.02%, Mg metal < 0.02%, SO4 < 0.005%, Ba < 0.002%, insoluble matter < 0.005%. Total < 0.16% (excluding H2O)
Chemical composition
Formula
$K^+ \cdot Br^-$
Chemical formula
KBr
Elemental formula
(K+) (Br-)
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$K^+$ Potassium(1+) cation element 1 0.5 1 constituent cation main
$Br^-$ Bromide anion element 1 0.5 1 constituent anion main
Composition comments
Deliquescent, very soluble in water: 678 g/l (25 °C)
Chemical bonds
  Bond Number
$K^+ \cdot Br^-$ 1
Class
normal salts (07)
Type
simple normal salts (07.01)
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
119.002 $g/mol$
Density
2.74 $g/cm^3$
Refringence type
isotropic
Refraction index $n_{\alpha}$
1.560
Color
colorless, white
Diaphaneity
transparent to translucent
Luster
vitreous