mottramite

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mottramite

[′mä·trə‚mīt]

(mineralogy)

(Cu,Zn)Pb(VO₄)(OH) A mineral composed of a basic lead copper zinc vanadate; it is isomorphous with descloizite. Also known as cuprodescloizite; psittacinite.

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Descloizite has been found at the Brown Monster mine, associated with mottramite. It is brown in color and tends to form larger crystals (to 0.25 mm) than the mottramite, which is typically more micro-botryoidal.

The Brown Monster and Reward mines: Inyo County California

In 1865 Roscoe was inspired to begin investigating vanadium when he visited the copper mines at Mottram (the type locality for the vanadium mineral mottramite, described by Domeyko in 1848), near Alderley Edge in Cheshire.

Provenance: of specimens in the Greenbank collection

Rarely, small pyromorphite crystals are seen embedded in crusts of blue botryoidal hemimorphite and very rarely pyromorphite is found associated with small rounded mottramite crystals.

Caldbeck Fells

White to colorless, translucent to transparent, flattened rhombohedral crystals of calcite to 3 cm form floater groups heavily coated and/or included by bright yellow-green, fernlike growths of mottramite crystals.

Munich show 2007

These include arseniosiderite, bromargyrite, cabalzarite, chalcophyllite, clinoclase, clinotyrolite, cobaltkoritnigite, cornubite, fornacite, geminite, litharge, mottramite, nickellotharmeyerite, novacekite, parnauite, powellite, uvarovite, walentaite, wulfenite, yukonite and zalesiite.

Famous mineral localities: Bou Azzer, Morocco

Other associated minerals are: cerussite, bindheimite, vauquelinite, mottramite and pyromorphite.

Abstracts of new mineral descriptions

Crystals of both types reach 2.5 cm on edge, and they perch at high angles on drusy coatings of black mottramite microcrystals and tiny quartz crystals over rock.

Tucson Show 2002. (What's New in Minerals)

Associated minerals are: manganite, quartz, barite, ankerite, mottramite barian brackebuschite and cuprian-cobaltoan pyrobelonite.

Abstracts of new mineral descriptions

A third specimen is a sample of mottramite, together with an X-ray pattern identifying the mineral as such.

Butte, Montana: Minerals, mines, and history

Associated minerals are azurite, quartz, plancheite, cerussite and mottramite. Good dioptase specimens have also been reported from copper prospects at M'Foati.

Tucson Mineralogical Symposium: Minerals of Africa. (Abstracts of the 23rd Annual)

Conversely, a number of species occurring at the Blanchard mine (antlerite, cinnabar, hydrozincite, sulfur, mottramite, otavite, and cuprite) have not been found at the Mex-Tex mine.

THE MEX-TEX MINE, BINGHAM, NEW MEXICO

The mineralogy and geochemistry of this gossan have been described by Nickel (1982), who noted the occurrence of a number of secondary ore minerals including malachite, azurite, chrysocolla, pseudomalachite, cerussite, alunite, jarosite, plumbojarosite, osarizawaite, plumbogummite, duftite, mimetite, fornacite, wulfenite, mottramite, iodargyrite, native silver and a silver-mercury amalgam.