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第328样 检出多晶型石英
样品特征:

与磁铁相吸的程度为不相吸;数据有矿物分析

鉴定结论:

检出石英、白云石和多晶型石英Moganite,Moganite是比较少见的一种矿物

样品类别:

(7)非常规岩石

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1.样品相关资料

(1)样品特征:样品与强磁铁不相吸。

 

(2) 样品重量:收到样品重量为 5310.9克,样品回寄。

 

2. 分析结果

(1)矿物分析

谱图:

检出矿物:

 

  石英 Silicon dioxide $-alpha Si O2
  白云石 Dolomite Ca Mg ( C O3 )2
  多晶型石英 Moganite Si O2

 

3.结果评述及鉴定结论

(1)矿物分析检出石英、白云石和多晶型石英Moganite,不符合陨石的矿物组成,但是其中的多晶型石英Moganite是比较少见的一种矿物,也是本网站第一次检出,列本岩石于特殊岩石类,继续检测的意义不大。

  多晶型石英Moganite的 相关资料来自维基百科:http://en.wikipedia.org/wiki/Moganite

  Moganite is a silicate mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in 1984.[1] It crystallises in the monoclinic crystal system. Moganite is considered a polymorph of quartz: it has the same chemical composition as quartz, but a different crystal structure.[2]
  In 1994, the International Mineralogical Association (IMA) had disapproved it as being a separate species because it was not clearly distinguishable from quartz.[3] It has only recently (2007) been approved as a valid species by the CNMNC, the Commission on New Minerals, Nomenclature and Classification (part of the IMA).[4]

  Chemical arrangement of Moganite


  This mineral has been mainly found in dry locales such as Gran Canaria and Lake Magadi.[5] It has been reported from a variety of locations in Europe, India and the United States.[1] It was named for the municipality of Mogán on Gran Canaria.[2] Physically, it has a hardness of about 6, a dull luster and appears gray in color but transparent.


References
    1. Ralph, Jolyon, and Ida Ralph. "Moganite: Moganite Mineral Information and Data." MinDat. 2007. Aug. 2007 <http://www.mindat.org/min-2739.html>.
    2. http://webmineral.com/data/Moganite.shtml Webmineral data
    3. Origlieri, Marcus. "Moganite: a New Mineral -- Not!" Lithosphere (1994). Aug. 2007 <http://geopress.rbnet.net/moganite.htm>.
    4.  Nickel, Ernest H., and Monte C. Nichols. "IMA/CNMNC List of Mineral Names." Materials Data. June 2007. Aug. 2007 http://www.geo.vu.nl/users/ima-cnmmn/MINERALlist.pdf Archived May 30, 2008, at the Wayback Machine.
    5. Heaney, Peter J., and Jeffrey E. Post. "The Widespread Distribution of a Novel Silica Polymorph in Microcrystalline Quartz Varieties." Science ns 255 (1992): 441-443. JSTOR. Aug. 2007. Keyword: moganite.

 

 

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