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