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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.
We are grateful to NASA for the funding of this effort.
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Name: Omphacite RRUFF ID: R061129 Ideal Chemistry: (Ca,Na)(Mg,Fe,Al)Si2O6 Locality: near Occidental, Sonoma County, California, USA Source: Michael Scott S104252 [view label] Owner: RRUFF Description: Green granular massive associated with brown grossular and clinochlore Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis. |
| Mineral Group: [ pyroxene (81) ] | ||
| Quick search: [ All Omphacite samples (2) ] | ||
| CHEMISTRY | ||||||||||
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| RAMAN SPECTRUM | ||||||||||||
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| BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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| POWDER DIFFRACTION | |||||||
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| RRUFF ID: | R061129.9 | ||||||
| Sample Description: | Single crystal, powder profile is calculated | ||||||
| Cell Refinement Output: |
a: 9.581(5)Å b: 8.769(4)Å c: 5.251(2)Å alpha: 90° beta: 106.84(2)° gamma: 90° Volume: 422.2(2)Å3 Crystal System: monoclinic |
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| REFERENCES for Omphacite | |
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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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Hoffmann C A S, Breithaupt A (1815) Omphazit, Handbuch der Mineralogie, 2, 302-302 [view file] |
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Dana E S (1904) Monoclinic Section. Pyroxene, in The System of Mineralogy of James Dwight Data 1837-1868, Sixth Edition John Wiley & Sons New York 352-371 [view file] |
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Clark J R, Appleman D E, Papike J J (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements, Mineralogical Society of America Special Paper, 2, 31-50 [view file] |
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Curtis L, Gittins J, Kocman V, Rucklidge J C (1975) Two crystal structure refinements of A p2/n titanian ferro-omphacite, The Canadian Mineralogist, 13, 62-67 [view file] |
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Cameron M, Papike J J (1981) Structural and chemical variations in pyroxenes, American Mineralogist, 66, 1-50 [view file] |
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Morimoto N (1988) Nomenclature of pyroxenes, Mineralogical Magazine, 52, 535-550 [view file] |
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Pavese A, Bocchio R, Ivaldi G (2000) In situ high temperature single crystal X-ray diffraction study of a natural omphacite, Mineralogical Magazine, 64, 983-993 [view file] |
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Buzatu A, Buzgar N (2010) The Raman study of single-chain silicates, Analele Stiintifice Ale Universitatii, Al. I. Cuza Iasi Geologie, 56, 107-125 [view file] |
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Pandolfo F, Nestola F, Cámara F, Domeneghetti M C (2012) High-pressure behavior of space group P2/n omphacite, American Mineralogist, 97, 407-414 [view file] |
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Schultze D J, Flemming R L, Shepherd P H M, Helmstaedt H (2014) Mantle-derived guyanaite in a Cr-omphacite xenolith from Moses Rock diatreme, Utah, American Mineralogist, 99, 1277-1283 |
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Nespolo M, Aroyo M I (2016) The modular structure of pyroxenes, European Journal of Mineralogy, 28, 189-203 |
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Hao M, Pierotti C E, Tkachev S, Prakapenka V, Zhang J S (2019) The single-crystal elastic properties of the jadeite-diopside solid solution and their implications for the composition-dependent seismic properties of eclogite, American Mineralogist, 104, 1016-1021 |
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