• Sewardite - Wikipedia

    en.wikipedia.org/wiki/Sewardite Sewardite is a rare arsenate mineral with formula of CaFe 2 +3 (AsO 4) 2 (OH) 2. Sewardite was discovered in 1982 and named for the mineralogist, Terry M. Seward (born 1940), a professor of geochemistry in Zürich, Switzerland. Properties. Sewardite is orthorhombic, which means in crystallographic terms, it contains 3 axes of unequal length, one "c" axis, and 1 "a" axis, and 1 "b" axis.
  • Sewardite Mineral Data

    webmineral.com/data/Sewardite.shtml Sewardite Comments: Photomicrograph of an isolated fragment of red sewardite as well as a fragment in green to black botryoidal matrix. Location: Single specimen of gangue collected from the 31st level of the Tsumeb mine, Tsumeb, Namibia.
  • Sewardite dictionary definition | sewardite defined

    www.yourdictionary.com/sewardite sewardite definition: Noun 1. (mineralogy) An orthorhombic-dipyramidal mineral containing arsenic, calcium, hydrogen, iron, oxygen, and zinc.Origin -ite...
  • What does sewardite mean? - Definitions.net

    www.definitions.net/definition/sewardite Definition of sewardite in the Definitions.net dictionary. Meaning of sewardite. What does sewardite mean? Information and translations of sewardite in the most comprehensive dictionary definitions resource on the web.
  • Sewardite - Mindat.org - Mines, Minerals and More

    www.mindat.org/gm/11128 Rosette-shaped sewardite aggregate (PXRD- and EDS-analysed). SEM micrograph. Deep-red rounded to rosette-shaped sewardite aggregates (PXRD- and EDS-analysed), with a diameter of about 0.1 mm. The sewardite is associated with fine-grained, yellowish beudantite/segnitite (slightly K- and Cu-bearing). The sample was originally in the collection ...
  • (PDF) Sewardite, CaFe23+(AsO4)(2)(OH)(2), the Ca-analogue ...

    www.researchgate.net/.../250273449_Sewardite_CaFe23AsO42OH2_the_Ca-analogue_o... Sewardite has physical properties that are very similar to those of carminite; it is dark red in masses to a much lighter red to orange on thin edges of small fragments. The streak is reddish ...
  • Sewardite: Mineral information, data and localities.

    www.mindat.org/show.php Sewardite Roberts A C, Cooper M A, Hawthorne F C, Criddle A J, Stirling J A R (2002) Sewardite, CaFe2(AsO4)2(OH)2, the Ca-analogue of carminite, from Tsumeb, Namibia: Description and crystal structure The Canadian Mineralogist 40 1191-1198
  • Sewardite R060720 - RRUFF Database: Raman, X-ray, Infrared ...

    rruff.info/Sewardite/R060720 Name: Sewardite RRUFF ID: R060720 Ideal Chemistry: CaFe 3+ 2 (AsO 4) 2 (OH) 2 Locality: Las Animas mine, La Mur, Sonora, Mexico Source: Bob Jenkins Owner: RRUFF Description: Aggregates of bright red granular or prismatic crystals, associated with dark red platy arseniosiderite (R150061). Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical ...
  • Sewardite: Mineral information, data and localities.

    zh.mindat.org/min-11128.html Sewardite. This page is currently not sponsored. Click here to sponsor this page. Photos of Sewardite (15) Sewardite Gallery Search Photos of Sewardite. Edit Add Synonym Clear Cache Edit 'Best-of' Discussion. Sewardite Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico. Sewardite
  • SEWARDITE, CaFe3+ (AsO (OH) , THE Ca-ANALOGUE OF CARMINITE ...

    rruff-2.geo.arizona.edu/uploads/CM40_1191.pdf Sewardite is the Ca-dominant analogue of carminite, ideally Pb2+Fe3+(AsO 4) 2(OH) 2. Keywords: sewardite, new mineral species, calcium iron hydroxide-arsenate, carminite, X-ray data, electron-microprobe data, reflectance data, infrared spectroscopy, crystal structure, Tsumeb mine, Tsumeb, Namibia. SOMMAIRE