Mineral - Behoite
Behoite
Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
middle
Formula
Be(OH)₂
Unit Cell
a=4.62 b=7.05 c=4.55 Z=4
Physical Properties
Hardness
4
Streak
white
Density
Light (<2)
Cleavage
Fracture
conchoidal
Tenacity
Brittle
Optical Properties
Color
whiteyellow whitecolorless
Birefringence
0.015
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-disphenoidal - 222
Space Group
P2 1 2 1 2 1 (19)
Habit
acicular, skeletal
Formation
Secondary in magmatic pegmatites, from the alteration of primary beryllium minerals
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Behoite
Name and first discovery: Named after the chemical composition of beryllium and the hydroxyl group (OH). First discovered in 1970
Chemism:
Synonyms:
Varieties:
Abbreviation: Beh