Strontium Sulfate
SrSO4
|
Chemical name
Strontium Sulfate |
|
Mineral name
Coelestine |
|
Chemical formula
SrSO4 |
|
Melting point [°C]
1606 |
|
Crystal system
orthorhombic |
|
Crystal Class
orthorhombic-dipyramidal (2/m 2/m 2/m) |
|
Space Group
Pnma |
|
Unit cell
a [Å]:8.36 b [Å]:5.35 c [Å]:6.85 |
|
Molecular weight [g/mol]
183,68 |
|
Formula units
Z=4 |
|
Frequent crystal surfaces
{001}, {010}, {011}, {101}, {210} |
|
Mohs hardness
3 - 3.5 |
|
Density [g/cm3]
3.9 |
|
Cleavage
perfect on {001}, indistinct on {210} |
|
Fracture / Tenacity
brittle, uneven to conchoidal |
|
Color
colorless, white, pale blue, pink, pale green, pale brown, black |
|
Streak
white |
|
Transparency
transparent to translucent |
|
Luster
vitreous, pearly on cleavage surfaces |
|
Optical character
biaxial (+) |
|
Refractive Index
nα=1.619-1.622; nβ=1.622-1.624; nΥ=1.630-1.632 |
|
Birefringence δ
0.011 |
|
Pleochroism δ
weak |
