PEISLEYITE Meaning and
Definition
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Peisleyite is a rare mineral that belongs to the oxalate mineral group. It is named after John Peisley, an Australian mineralogist. Its chemical formula is (H3O)H(C2O4)2·2H2O, indicating its composition of hydrated hydrogen oxalate. The mineral crystallizes in the monoclinic system and forms prismatic to blocky crystals, often found in aggregates or as crusts.
Peisleyite is typically translucent and exhibits a pale yellow to colorless appearance. Its luster is vitreous to dull, and it possesses a white streak. The mineral has a relatively low hardness, ranking around 2.5 on the Mohs scale, which means it can be easily scratched or powdered.
It is commonly found as a secondary mineral in low-temperature hydrothermal veins, particularly in association with other oxalate minerals such as weddellite and whewellite. Peisleyite is primarily composed of hydrogen oxalate molecules, which are formed through the oxidation of organic matter in the presence of water and carbon dioxide.
Due to its relative rarity, peisleyite has limited industrial or commercial applications. However, it is highly sought after by mineral collectors and researchers due to its unique crystal habit and chemical composition. As a scientific curiosity, peisleyite contributes to our knowledge of mineral formation processes and can reveal important information about specific geological environments.
