Important Update News
The RRUFF Project is being updated to improve its interface and content. The beta version of the update is accessible to the public at RRUFF.net. New data is only being added to the beta site. Please note that it is in development, and some components are not functional. Existing RRUFF.info links will resolve to the new site after RRUFF.net is officially released.
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Name: Melanotekite RRUFF ID: R090032 Ideal Chemistry: Pb2Fe3+2O2(Si2O7) Locality: Kombat, Namibia Source: William W. Pinch [view label] Owner: RRUFF Description: Black, massive exhibiting greasy luster, associated with colorless to pale brown bladed yangite (R090031). Sample is from the John Innes collection. Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction. |
RAMAN SPECTRUM | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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POWDER DIFFRACTION | |||||||
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RRUFF ID: | R090032.9 | ||||||
Sample Description: | Single crystal, powder profile is calculated | ||||||
Cell Refinement Output: |
a: 6.987(2)Å b: 11.045(2)Å c: 10.065(2)Å alpha: 90° beta: 90° gamma: 90° Volume: 776.7(2)Å3 Crystal System: orthorhombic |
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REFERENCES for Melanotekite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file] |
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Lindström G (1880) Analyser af tvenne mineral från Långban, Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar, 37, issue 6 53-58 [view file] |
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Ito J, Frondel C (1966) Syntheses of the kentrolite-melanotekite series, Arkiv för Mineralogi och Geologi, 4, 387-390 |
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Welin E (1968) Notes on the mineralogy of Sweden 6. X-ray powder data for minerals from Långban and the related mineral deposits of Central Sweden, Arkiv för Mineralogi och Geologi, 4, 499-541 |
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Moore P B, Sen Gupta P K, Shen J, Schlemper E O (1991) The kentrolite-melanotekite series, 4Pb2(Mn,Fe)3+2O2[Si2O7]: Chemical crystallographic relations, lone-pair splitting, and cation relation to 8URe2, American Mineralogist, 76, 1389-1399 [view file] |
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Dörsam G, Liebscher A, Wunder B, Franz G (2008) Crystal structures of synthetic melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9), and the aluminum analogue (Pb2Al2Si2O9), American Mineralogist, 93, 573-583 [view file] |
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