Formula: NaCaB5O7(OH)4.3H2O
Origin of name: for Frank Probert, American geologist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless, transparent
Diaphaneity:
Luster: vitreous
Habit: crystals acicular, rare as singles, as aggregates, spherulitic, compact aggregates
Hardness: 3.5
Specific gravity: 2.14
Cleavage: 1; {110} perfect
Tenacity:
Streak:
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 |