PICKERINGITE Meaning and
Definition
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Pickeringite is a mineral that belongs to the sulfate family and has a chemical composition of hydrated magnesium aluminum sulfate. It is commonly found as a secondary mineral in the oxidized zones of sulfide mineral deposits, especially those containing pyrite or marcasite. The mineral typically forms small, thin, fibrous or acicular crystals, which can be colorless, white, or pale yellow.
The physical properties of pickeringite include a hardness of 2.5 to 3 on the Mohs scale, meaning it is relatively soft. It has a vitreous to pearly luster and a white streak. Pickeringite also exhibits a monoclinic crystal system, with prismatic or bladed crystal habits. However, it is more commonly found in aggregated or fibrous forms.
Pickeringite is soluble in water, making it vulnerable to dissolution and alteration in humid environments. It often occurs as efflorescence on walls and rocks subjected to weathering, where it can create crusts or coatings. This mineral can be found in various locations worldwide, including regions such as Hungary, Germany, Italy, the United States, and Australia.
In summary, pickeringite is a hydrated magnesium aluminum sulfate mineral that forms secondary deposits in sulfide-rich environments. It has a soft crystalline structure, usually appearing as fibrous or acicular crystals. Its ability to dissolve in water can lead to the formation of efflorescence in certain conditions.
Etymology of PICKERINGITE
The word "pickeringite" is derived from the name of the English chemist and mineralogist, Edward Pickering (1846-1919). Pickering discovered this mineral in 1859 and it was subsequently named in his honor.
Pickeringite is a mineral composed of hydrated magnesium aluminum sulfate and is typically found in evaporite deposits or volcanic environments. It often appears as white or colorless crystals, and its chemical formula is MgAl2(SO4)4·22H2O.
