Specific gravity: 2.50 to 2.68
Colour: Colourless to white
Solubility: Decomposed by sulphuric acid with evolution of HF Dana
Hydrokenoralstonite is an alteration product of cryolite (Webmin). It occurs
in some granite pegmatites and
greisenized zones rich in fluorine, and also in a hydrothermal
in silicified limestone. Associated minerals include
prosopite and fluorite (HOM).
At Tom's Quarry, Kapunda, Mt Lofty Ranges, South Australia, hydrokenoralstonite has been identified on a goethite matrix on a single specimen (AJM 17.1.29).
At the type locality, the Ivigtut Cryolite deposit, Sermersooq, Greenland, Denmark, hydrokenoralstonite is associated with thomsenolite and cryolite (Mindat, AM24.566-576).
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