Minyulite

minyulite

wavellite

aldermanite

fluellite

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Formula:KAl2(PO4)2F.4H2O
Hydrated phosphate containing halogen
Specific gravity: 2.47
Hardness: 3½
Streak: White
Colour: Colourless, white, greenish yellow; colourless in transmitted light.
Solubility: Readily soluble in warm dilute NaOH and in hot concentrated hydrochloric and sulphuric acids, and slowly soluble in warm dilute nitric acid (AM 18.512).
Environments

Sedimentary environments

Minyulite is commonly associated with wavellite and fluellite, and less commonly with aldermanite, saléeite, crandallite, leucophosphite, cacoxenite and tinsleyite (AJM 17.1.22), and also with dufrénite, apatite and variscite (HOM).

At Wolffdene quarry, Logan City Shire, Queensland, Australia, minyulite occurs with fluellite (Dana).

At the Moculta quarry, Angaston, Barossa Valley, Mount Lofty Ranges, South Australia, minyulite is found growing on apatite and associated with fluellite (AM 17.1.22).

At Wait's quarry, Noarlunga, Angaston, Mount Lofty Ranges, South Australia, minyulite occurs with dufrénite in altered outcrops of glauconite-bearing phosphate beds (Dana).

At the type locality, the Minyulo Well, Dandaragan, Dandaragan Shire, Western Australia, minyulite occurs filling minute veins or cavities in a highly phosphatic ironstone bed made up of limonite, quartz, dufrénite, apatite and glauconite (AM 18.512), associated with wavellite, variscite, leucophosphite, glauconite, fluellite, dufrénite and apatite (Mindat)

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