Kidwellite, Alunite Supergroup
Specimen ID: 37H-E5M
Kidwellite : NaFe3+9+x(PO4)6(OH)11·3H2O, x = 0.33
Alunite Supergroup : AD3(XO4)2(OH)6
As recorded:
Ste Barbe vein, Montmins mining district, Échassières, Vichy, Allier, Auvergne-Rhône-Alpes, France
Photo added to mindat.org
“Kidwellite crystals and balls (yellow green) with minor Alunite group (orange yellow; possibly Plumbogummite)
Field of view 2 mm
Photo and Collection Patrice Queneau ”
Patrice Queneau - 24th February 2008
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