What is Kalicinite?
Kalicinite is a soft potassium bicarbonate mineral, a rare carbonate whose simple formula belies its sensitivity to moisture and changing conditions.
Mineralogy and crystal structure
Reference formula: KHCO3. Kalicinite has a monoclinic carbonate structure and is readily affected by water because bicarbonate minerals are relatively soluble. The selected COD model is deuterated and is labelled representative of the natural phase. Kalicinite is classified with carbonates and has a monoclinic crystal system. Typical hardness is 2–2.5 on the Mohs scale and specific gravity is approximately 2.2–2.3.
Colour, lustre and habit
Typical colours include colourless, white. The usual prismatic, tabular, granular habit and vitreous, pearly lustre help describe a specimen, but colour alone is not diagnostic.
Formation and notable localities
Kalicinite forms in or is associated with evaporitic, fumarolic and alkaline environments where potassium-rich solutions concentrate. Important documented localities include Italy, Germany, Russia and other potassium-rich localities.
A rare white carbonate with unusual chemistry
Kalicinite is a refined choice for a systematic carbonate collection. Its clean pale appearance invites a closer look at the chemistry of bicarbonate minerals and the environmental conditions needed to preserve them.
Collecting and care
Keep dry, sealed and away from humidity; do not wash or expose to acids.
