Brucite
Mg(OH)2
Chemical name
Brucite
Mineral name
Brucite
Chemical formula
Mg(OH)2
Crystal system
trigonal
Crystal Class
Hexagonal scalenohedral (3m) H-M symbol: (3 2/m)
Mohs hardness
2.5 to 3
Cleavage
Perfect on {0001}
Fracture / Tenacity
Irregular, sectile
Color
White, pale green, blue, gray; honey-yellow to brownish red
Streak
White
Transparency
Transparent
Optical character
Uniaxial (+)
Refractive Index
nω = 1.56–1.59 nε = 1.58–1.60
Birefringence δ
0,02
Other
Pyroelectric