Lead Vanadium Chloride
Pb5(VO4)3Cl
Chemical name
Lead Vanadium Chloride
Mineral name
Vanadinite
Chemical formula
Pb5(VO4)3Cl
Crystal system
hexagonal
Crystal Class
hexagonal-dipyramidal (6/m)
Space Group
P6_3/m
Unit cell
a [Å]:10.32
b [Å]:10.32
c [Å]:7.34
Molecular weight [g/mol]
1416,31
Formula units
Z=2
Frequent crystal surfaces
{0001}, {10-10}, {10-11}, {21-31}
Mohs hardness
3 - 4
Density [g/cm3]
6.8 - 7.1
Cleavage
none
Fracture / Tenacity
uneven, conchoidal
Color
yellow, orange, brown, sometimes red
Streak
white to bright yellowish-brown
Transparency
opaque to transparent or translucent
Optical character
uniaxial (-)
Refractive Index
nω=2.416; nε=2.350
Birefringence δ
0.066