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Minerals - Brazilianite | TerraCollect
Mineral - Brazilianite
Brazilianite
NaAl₃[(OH)₂|PO₄]₂
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
NaAl₃[(OH)₂|PO₄]₂
Unit Cell
a=11.23 b=10.14 c=7.10 β=97° Z=4
Physical Properties
Hardness
5.5
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
green
colorless
Birefringence
0.020
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Composition
Elements
Mass
Pâ‚‚Oâ‚…
37.97
Al₂O₃
43.82
Naâ‚‚O
8.42
Kâ‚‚O
0.37
Hâ‚‚O
9.65
Brazil (Palache et al. 1952)
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Distinct after {010}
Fracture
conchoidal
Tenacity
Brittle
Point Group
monoclinic-prismatic - 2/m
Space Group
P2
1
/c (14)
Habit
prismatic,
radial
Formation
Magmatic, in Pegmatites
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Brazilianite
