Lannonite

lannonite

wilcoxite

khademite

Lone Pine Mine

Images

Formula: HCa₄Mg₂Al₄(SO₄)₈F₉.32H₂O
Valence: HCa₄Mg₂Al₄(S⁶⁺O₄)₈F₉.32H₂O
Hydrated sulphate
Crystal System: Tetragonal
Specific gravity: 2.22 measured, 2.32 calculated
Hardness: 2
Colour: White
Solubility: Insoluble in water, but readily dissolved by cold, dilute acids
Environments

Hydrothermal environments

Localities

At the type locality, the Lone Pine Mine, Lone Pine Hill area, Wilcox Mining District, Catron County, New Mexico, USA, lannonite occurs as nodules composed of innumerable tiny square plates 10 to 20 µm in size. It is a secondary mineral formed from pyrite- and fluorite- rich veins in silicified rocks, efflorescences in breccia zones, on the walls of the adit and in pools of water on the adit floor. Associated minerals include fluorite, gypsum khademite, wilcoxite and pyrite (HOM, Mindat).
Lannonite from the Lone Pine Mine - Image

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