Hydrokenopyrochlore

hydrokenopyrochlore

hubnerite

stibiotantalite

heftetjernite

Images

Formula: (☐,Sb3+,Na)2Nb2O6.H2O
Oxide, pyrochlore group, antimony- and niobium- bearing mineral
Specific gravity: 5.08 calculated
Streak: White
Colour: Tan to beige
Environments

Pegmatites

Localities

The type locality, the Antandrokomby pegmatite, Manandona Valley, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar is a lithium-cesium-tantalum type pegmatite, boron-enriched danburite subtype, intruded into dolomitic marbles. Hydrokenopyrochlore occurs as relics, closely associated with quartz, orthoclase, lithium-rich mica, hübnerite, a heftetjernite-like mineral, stibiotantalite, and red tourmaline. It forms tan to beige subhedral porous crystals up to 1 mm (EJM 30.869-876, AM 106.1188-1189).

Back to Minerals