Mecury Sulfide
HgS
|
Chemical name
Mecury Sulfide |
|
Mineral name
Cinnabarite |
|
Chemical formula
HgS |
|
Melting point [°C]
580 |
|
Crystal system
trigonal |
|
Crystal Class
trigonal-trapezohedral (32) |
|
Space Group
P3_1 21 |
|
Unit cell
a [Å]:4.15 b [Å]:4.15 c [Å]:3.26 |
|
Molecular weight [g/mol]
232,66 |
|
Formula units
Z=3 |
|
Frequent crystal surfaces
{0001}, {10-11} |
|
Twinning
contact and penetration twins on {0001} |
|
Mohs hardness
2 - 2.5 |
|
Density [g/cm3]
8.18 |
|
Cleavage
perfect on {10-10}, prismatic |
|
Fracture / Tenacity
brittle, sectile, conchoidal to uneven |
|
Color
red to brownish red, lead-gray |
|
Streak
scarlet |
|
Transparency
transparent in thin flakes |
|
Luster
adamantine, metallic to dull |
|
Optical character
uniaxial (+) |
|
Refractive Index
nω=2.905; nε=3.256 |
|
Birefringence δ
0.351 |
