Labradorite

An50-An70

Labradorite - An50-An70Labradorite - An50-An70Labradorite - An50-An70Labradorite - An50-An70
Chemical name
Labradorite
Mineral 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