Stibnite
- Synonym: Antimonite
- The mineral has been known since ancient times and was used as a paste with fat as black make-up powder to color eyelids and eyebrows. In Arabic culture, dark eye rims are regarded as the ideal of beauty and at the same time as a magical repellent.
- Formula: Sb2S3
- Space group: Pnma (No. 62)
- Crystal system: orthorhombic
- Crystal class: mmm
- Lattice parameters: a = 11.3107 Å, b = 3.8363 Å, c = 11.2285 Å, α = β = γ = 90°
Picture: DerHexer, Wikimedia Commons, CC BY-SA 4.0
Crystal structure (click on the picture to download the VESTA file):
(K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,” J. Appl. Crystallogr., 44, 1272-1276 (2011).)
- SbS5 tetragonal pyramids (purple)
For a 3D interactive version on sketchfab, see here:
The Fascination of Crystals and Symmetry 