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Sulfate

Adranosite-(Fe)

(NH₄)₄NaFe₂(SO₄)₄Cl(OH)₂
Crystal systemTetragonal
ClassSulfate
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Adranosite-(Fe)

Adranosite-(Fe) is an IMA-recognized mineral species in the sulfate class, with the chemical formula (NH₄)₄NaFe₂(SO₄)₄Cl(OH)₂.

It crystallizes in the tetragonal crystal system (space group I4_1/acd). It is a member of the Adranosite structural group.

Key properties: specific gravity 2.18; White streak; Vitreous luster; optically uniaxial.

IMA symbol Arn-Fe, IMA status: approved, named in 2011.

A sublimate found on pyroclastic breccia in volcanic fumaroles (Italy); an anthropogenic product of a burning coal dump (Anna mine, near Aachen, North Rhine-Westphalia, Germany).

It is found associated with Thermessaite, pseudocotunnite, bismuthinite or barberiite, salammoniac, anhydrite, sassolite, sulfur (Italy); clairite, tschermigite, rostite/khademite.

As the Fe3+ analog of adranosite – the base name for the ancient god of fire Adranos.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more A minerals or help write this entry.