Formula: SnO2
Origin of name: From Greek for tin
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning: Very common on {011}, contact, penetration, geniculated, or lamellar
Unit cell: a = 4.738 Ǻ, c = 3.188 Ǻ
Colour: Brown to brownish black, black, colourless, gray, yellowish
Diaphaneity:
Luster: Adamantine, vitreous
Habit: Crystals short prismatic, sometimes slender prismatic or pyramidal; granular, botryoidal of reniform masses
Hardness: 6 to 7
Specific gravity: 6.99
Cleavage: 4; {100} imperfect, {110} indistinct, {111} and {011} parting
Tenacity: Subconchoidal to uneven; brittle
Streak: White, grayish, brown
Synonyms/varieties: Ainalite (Ta-rich variety), wood tin (colloform variety), stannite, varlamoffite (Fe3+ -rich variety)
Comments:
| Back to Alphabetical list | Colour photos | Optical properties/Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |