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.
We are grateful to NASA for the funding of this effort.
![]() |
![]() |
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) ] |
CHEMISTRY | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
![]() |
|
RAMAN SPECTRUM | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
POWDER DIFFRACTION | ||||||||
---|---|---|---|---|---|---|---|---|
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 |
|||||||
|
|
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 CaOMgOSiO2 (preliminary report), Journal of the American Ceramic Society, 26, 321-332 |
|
Roy D M (1956) Subsolidus data for the join Ca2SiO4CaMgSiO4 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] |
|
|