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Minerals - Londonite | TerraCollect
Mineral - Londonite
Londonite
(Cs,K,Rb)Al₄Be₄(B,Be)₁₂O₂₈
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
(Cs,K,Rb)Al₄Be₄(B,Be)₁₂O₂₈
Unit Cell
Physical Properties
Hardness
8
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
yellow
colorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Cleavage
Fracture
Tenacity
Space Group
Habit
dodecahedron,
Tetrahedron
Formation
Magmatisch
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Londonite
