Formula: BaCO3
Origin of name: for W. Withering, English physician
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning: universal on {110}, repeated resulting in pseudohexagonal dipyramids
Unit cell: a = 5.314 Å, b = 8.904 Å, c = 6.430 Å
Colour: colourless, white, gray, may have pale yellow, greenish or brown tint
Diaphaneity:
Luster:
Habit: crystals pseudohexagonal dipyramids formed by twinning, or tabular or short prismatic, with convex base, massive
Hardness: 3 to 3.5
Specific gravity: 4.29
Cleavage: 2; {010} distinct, {110} imperfect
Tenacity: uneven
Streak:
Synonyms/varieties:
Comments: series with strontianite, fluoresces an phosphoresces bluish white under SW ultraviolet light
| 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 |