Merwinite R070195

Name: Merwinite
RRUFF ID: R070195
Ideal Chemistry: Ca3Mg(SiO4)2
Locality: Commercial Quarry, Riverside County, California, USA
Source: California Institute of Technology CIT-14405 [view label]
Owner: RRUFF
Description: Light gray massive
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Aphthitalite (3) ]
RRUFF ID: R070195.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca3.00(Mg0.98Fe2+0.02)Σ=1(Si1.00O4)2
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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RRUFF ID: R070195
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R070195.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
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RRUFF ID: R070195.1
Sample Description: Powder
Cell Refinement Output: a: 13.2913(3)Å    b: 5.3067(3)Å    c: 9.3446(3)Å
alpha: 90°    beta: 92.134(2)°    gamma: 90°   Volume: 658.65(3)Å3    Crystal System: monoclinic
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Merwinite

American Mineralogist Crystal Structure Database Record: [view record]

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]

Larsen E S, Foshag W F (1921) Merwinite, a new calcium magnesium orthosilicate from Crestmore, California, American Mineralogist, 6, 143-148   [view file]

Phemister J, Nurse R W, Bannister F A, (1942) Merwinite as an artificial mineral, Mineralogical Magazine, 26, 225-231   [view file]

Osborn E F (1943) The compound merwinite (3CaO·MgO·2SiO2) and its stability relations within the system CaO–MgO–SiO2 (preliminary report), Journal of the American Ceramic Society, 26, 321-332

Roy D M (1956) Subsolidus data for the join Ca2SiO4—CaMgSiO4 and the stability of merwinite, Mineralogical Magazine, 31, 187-194   [view file]

Moore P B, Araki T (1972) Atomic arrangement of merwinite, Ca3Mg[SiO4]2, an unusual dense-packed structure of geophysical interest, American Mineralogist, 57, 1355-1374   [view file]

Moore P B (1973) Bracelets and pinwheels: A topological-geometrical approach to the calcium orthosilicate and alkali sulfate structures, American Mineralogist, 58, 32-42   [view file]

Zedgenizov D A, Shatskiy A, Ragozin A L, Kagi H, Shatsky V S (2014) Merwinite in diamond from São Luiz, Brazil: A new mineral of the Ca-rich mantle environment, American Mineralogist, 99, 547-550   [view file]