Formula: KAl2(PO4)2(OH).2H2O
Origin of name: for Frank C. Tinsley (1916- ), American mineral collector, Black Hills specialist of Rapid City, South Dakota, USA
Crystal system: Monoclinic
Crystal class: m or 2/m
Twinning:
Unit cell:
Colour: Dark magenta-red to light brownish red, commonly zoned with colourless leucophosphite
Diaphaneity: Translucent
Luster: Vitreous
Habit: smaller than 0.1 mm epitactic overgrowths on leucophosphite, composite prismatic crystals, tabular, to 2 mm
Hardness: 5
Specific gravity: 2.69
Cleavage:
Tenacity: Brittle
Streak: Pink
Synonyms/varieties:
Comments: Found in highly altered triphylite pods in the intermediate zone of the pegmatite.
| 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 |