Formula: (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7
Origin of name: from Latin stibium = antimony and betafite
Crystal system: cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: dark brown to black-brown
Diaphaneity:
Luster: vitreous
Habit: crystals poorly formed octahedrons, to 8 mm, anhedral grains
Hardness: 5
Specific gravity: 5.30
Cleavage: none
Tenacity:
Streak: pale brown to creamy
Synonyms/varieties:
Comments:
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |