Mottramite

Mottramite
General
Category	Vanadate minerals
Chemical formula	PbCu(VO4)(OH)
Strunz classification	08.BH.40
Crystal symmetry	mmm (2/m 2/m 2/m) - Dipyramidal
Unit cell	a = 7.68Å, b = 9.27Å, c = 6.03Å
Identification
Color	Grass-green, olive-green, yellow-green, siskin-green, blackish brown, nearly black
Crystal system	Orthorhombic
Cleavage	None observed
Fracture	Irregular/uneven, sub-conchoidal
Tenacity	Brittle
Mohs scale hardness	3 - 3½
Luster	Greasy
Streak	Yellowish green
Diaphaneity	Transparent, opaque
Specific gravity	5.9
Optical properties	Biaxial (-)
Refractive index	nα = 2.170(2) nβ = 2.260(2) nγ = 2.320(2)
Birefringence	δ = 0.150
Pleochroism	Visible
2V angle	Measured: 73° , Calculated: 46°
Dispersion	strong r > v rarely r < v

Mottramite is an orthorhombic mineral, PbCu(VO₄)(OH), at the copper end of the descloizite group. It was formerly called cuprodescloizite or psittacinite (this mineral characterized in 1868 by Frederick Augustus Genth).

References

• Mindat.org
• Webmineral.com
• Mineral galleries

This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it.v · Categories: Vanadate minerals Copper minerals Lead minerals Descloizite group Orthorhombic minerals Mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем решить контрольную работу 1976 in Irish television Action of 5 November 1813 Look at other dictionaries: mottramite — motramitas statusas T sritis chemija apibrėžtis Mineralas. formulė Pb(Cu,Zn)[OH|VO₄] atitikmenys: angl. mottramite rus. моттрамит …   Chemijos terminų aiškinamasis žodynas mottramite — /mo treuh muyt /, n. Mineral. a copper and lead vanadate. [1875 80; named after Mottram St. Andrew s, Cheshire, England, where it was found; see ITE1] * * *       vanadate mineral (PbCu(VO4)(OH)) similar to descloizite (q.v.). * * * …   Universalium mottramite — noun / mɑ tɹə maɪtˌ/ A mineral composed of a lead and copper vanadate …   Wiktionary mottramite — mot·tram·ite …   English syllables mottramite — ˈmä.trəˌmīt noun ( s) Etymology: Mottram St. Andrew, Cheshire, England + English ite : a mineral (Cu,Zn)Pb(VO4)(OH) that consists of a basic vanadate of lead, copper, and zinc with more copper than zinc and that is isomorphous with descloizite …   Useful english dictionary List of minerals K-M (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia Descloizite — specimen from Berg Aukas (Berg Aukus), Namibia, 9.5 x 8.9 x 4.9 cm]] General Category Vanadate mineral …   Wikipedia Mottramit — Kristallstufe aus Abenab, Südwest Afrika Chemische Formel Pb(Cu,Zn)[OH]|VO4] Mineralklasse Phosphate, Arsenat …   Deutsch Wikipedia List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… …   Wikipedia Crystal habit — This article is about the descriptive term used in mineralogy. For the addictive drug, see crystal methamphetamine. Pyrite sun (or dollar) in laminated shale matrix. Between tightly spaced layers of shale, the aggregate was forced to grow in a… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”