Labradorite
An50-An70
|
Chemical name
Labradorite |
|
Chemical formula
An50-An70 |
|
Crystal system
triclinic |
|
Crystal Class
Pinacoidal |
|
Space Group
C1 |
|
Unit cell
a [Å]:8.155 b [Å]:12.84 c [Å]:10.16 |
|
Mohs hardness
6 - 6.5 |
|
Cleavage
(001) perfect, (010) less perfect |
|
Fracture / Tenacity
Uneven to conchoidal |
|
Color
Gray, gray-white, brown, greenish, pale green, blue, yellow, colorless |
|
Luster
Vitreous, pearly on cleavages |
|
Refractive Index
nα = 1.554-1.563, nβ = 1.559-1.568, nγ = 1.562-1.573 |
|
Birefringence δ
0.008 - 0.010 |
