Fluorarrojadite-(BaNa)

fluorarrojadite-(BaNa)

viitaniemiite

triplite

fluorapatite

Images

Formula: BaNa4CaFe13Al(PO4)11(PO3OH)F2
Phosphate, barium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.61 measured, 3.650 calculated
Hardness: 4½ to 5
Streak: Very pale yellow
Colour: Yellowish brown to greenish yellow
Environments

Pegmatites
Hydrothermal environments

Localities

At the Pegmatite No. 31, Nanping pegmatite field, Yanping District, Nanping, Fujian, China, one type of triphylite successively transformed to lazulite, wagnerite, fluorarrojadite-(BaNa) and fluorapatite, suggesting successive replacement processes during magnesium-rich, sodium-rich and calcium-rich hydrothermal stages (EJM 26.1.179–188).

At the type locality, the Elisabeth mine, Gemerská Poloma, Rožňava District, Košice Region, Slovakia, fluorarrojadite-(BaNa) was found on the dump of Elisabeth adit. It occurs in hydrothermal quartz veins intersecting highly fractionated, topazzinnwaldite leucogranite. Fluorarrojadite-(BaNa) is associated with fluorapatite, ‘fluordickinsonite-(BaNa)’, triplite, viitaniemiite and minor amounts of other minerals. It forms fine-grained irregular aggregates up to 4 cm x 2 cm, which consist of individual anhedral grains up to 0.01 mm in size (MM 82.863-876).

Fluorarrojadite-(BaNa) from the Elisabeth Mine - Image

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