Compound carbonate, forms a solid solution with sakhaite
Specific gravity: 2.96
Colour: White, tannish brown
Solubility: Dissolves with effervescence in acetic or hydrochloric acid
Common impurities: TR,Ce,Fe,Mn,Sr,F,Cl
Volcanic igneous environments
Harkerite is a high-temperature mineral that occurs in skarn in
dolomitic limestone at the
contact with granite
(Webmin, Mindat). Associated minerals include calcite,
vesuvianite, cuspidine and
At the Alban Hills, Metropolitan City of Rome Capital, Lazio, Italy, harkerite occurs in volcanic ejecta (HOM).
At the type locality, Camas Malag, Torrin, Broadford, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK, harkerite occurs in skarn containing monticellite and calcite, and accessory bornite, chalcocite, magnetite and diopside, at the contact of dolomitic limestone with granite (AM 37.359). The harkerite is associated very intimately with calcite, which is a product of its alteration (AM 62.263-272).
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