Mansfieldite is an uncommon mineral that was named after an american geologist, George Rogers Mansfield. It has been considered a valid specie since 1948. It's a member of the variscite group. Mansfieldite creates a series with

scorodite Scorodite is a common hydrated iron arsenate mineral, with the chemical formula FeAsO4·2H2O. It is found in hydrothermal deposits and as a secondary mineral in gossans worldwide. Scorodite weathers to limonite. Scorodite was discovered in the ...

, and it is the aluminium analogue of said gem. Mansfieldite is colorless in transmitted light. It is mostly made out of oxygen (47.54%). Other components include arsenic (37.1%), aluminium (13.36%) and hydrogen (2%). Mansfieldite crystals form due to

hydrothermal Hydrothermal circulation in its most general sense is the circulation of hot water (Ancient Greek ὕδωρ, ''water'',Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with th ...

origin in altered and mineralized andesitic

pyroclastic rock Pyroclastic rocks (derived from the el, πῦρ, links=no, meaning fire; and , meaning broken) are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroc ...

s. Due to its size, mansfieldite is hard to see even under a microscope. The pink variation of the mineral is due to cobalt impurities, otherwise it is white to light gray. It can be found in the USA, Mexico, France, Algeria, England, Australia, Germany, Algeria and Kazakhstan.{{Cite web, last=Minerals, first=Dakota Matrix, title=Mansfieldite mineral information and data, url=https://www.dakotamatrix.com/mineralpedia/7291/mansfieldite, access-date=2021-06-22, website=www.dakotamatrix.com, language=en

References

Arsenate minerals Orthorhombic minerals Aluminium minerals