Bytownite
An70-An90
|
Chemical name
Bytownite |
|
Chemical formula
An70-An90 |
|
Crystal system
triclinic |
|
Crystal Class
Pinacoidal |
|
Space Group
I1 |
|
Unit cell
a [Å]:8.178 b [Å]:12.870 c [Å]:14.187 |
|
Mohs hardness
6 - 6.5 |
|
Cleavage
(001) perfect, (010) good, (110) imperfect |
|
Fracture / Tenacity
Uneven to conchoidal |
|
Color
Colorless, white, gray |
|
Luster
Vitreous, pearly on cleavages |
|
Refractive Index
nα = 1.563-1.572, nβ = 1.568-1.578, nγ = 1.573-1.583 |
|
Birefringence δ
0.010 - 0.011 |
