Constituent
Name
KBr
Official name
Potassium bromide
Family
ionic solid
Class
normal salt
Compound type
bromide
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 <0.5% H2O)
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
0.9992 $\pm$ 0.0008
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
Texture
monocrystalline
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