Fluorowardite

fluorowardite

iangreyite

krasnoite

gorceixite

Images

Formula: NaAl3(PO4)2(OH)2F2.2H2O
Phosphate, wardite group
Specific gravity: 2.760 calculated
Hardness: 5
Streak: White
Colour: Colourless to white or cream-coloured
Environments

Hydrothermal environments

Fluorowardite is a rare mineral, to date (March 2022) reported only from the type locality, approved in 2012.

Localities

At the type locality, the Silver Coin mine, Valmy, Iron Point Mining District, Humboldt county, Nevada, USA, fluorowardite is a secondary mineral in a fluorine-rich low-temperature secondary phosphate assemblage, as tetragonal-pyramidal crystals up to 0.1 mm across. Associated minerals include alunite, baryte, cacoxenite, chlorargyrite, fluorapatite, goethite, fluorine-rich gorceixite, iangreyite, iodargyrite, jarosite, kidwellite, kintoreite/plumbogummite, krásnoite, leucophosphite, lipscombite/zinclipscombite, meurigite-Na, metavariscite, fluorine-rich millisite, morinite, quartz, rockbridgeite, strengite/variscite and turquoise/chalcosiderite (HOM, Mindat).

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