Weddellite R050242

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Record 1 of 2  

Name: Weddellite
RRUFF ID: R050242
Ideal Chemistry: Ca(C2O4)·2H2O
Locality: Biggs, Wasco County, Oregon, USA
Source: Marcus Origlieri
Owner: RRUFF
Description: Isolated yellowish brown crystal
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Weddellite samples (2) ]
RRUFF ID: R050242.2
Sample Description: Microprobe fragment
Measured Chemistry: Ca1.00(C2O4)·2H2O ; C not measured
Sample Description: Unoriented sample

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RRUFF ID: R050242
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 40% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050242.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
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RRUFF ID: R050242.1
Sample Description: Powder
Cell Refinement Output: a: 12.3693(4)Å    b: 12.3693(4)Å    c: 7.3567(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1125.58(6)Å3    Crystal System: tetragonal
  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 Weddellite

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]

Bannister F A, Hey M H (1936) Report on some crystalline components of the Weddell Sea deposits, Discovery Reports, 13, 60-69   [view file]

Frondel C, Prien E L (1942) Carbonate-apatite and hydroxyl-apatite in urinary calculi, Science, 95, 431-431

Sterling C (1965) Crystal-structure analysis of weddellite, CaC2O4·(2+x)H2O, Acta Crystallographica, 18, 917-921

Tazzoli V, Domeneghetti C (1980) The crystal structures of whewellite and weddellite: re-examination and comparison, American Mineralogist, 65, 327-334   [view file]

Mandarino J A (1983) Weddellite from Lutterworth Township, Haliburton County, Ontario, The Canadian Mineralogist, 21, 509-511   [view file]

Mandarino J A, Witt N V (1983) Weddellite from Biggs, Oregon, U.S.A., The Canadian Mineralogist, 21, 503-508   [view file]

Frost R L, Weier M L (2003) Thermal treatment of weddellite--a Raman and infrared emission spectroscopic study, Thermochimica Acta, 406, 221-232

Garvie L A J (2003) Decay-induced biomineralization of the saguaro cactus (Carnegiea gigantea), American Mineralogist, 88, 1879-1888   [view file]

Echigo T, Kimata M, Kyono A, Shimizu M, Hatta T (2005) Re-investigation of the crystal structure of whewellite [Ca(C2O4)·H2O] and the dehydration mechanism of caoxite [Ca(C2O4)·3H2O], Mineralogical Magazine, 69, 77-88   [view file]

Hernanz A, Gavira-Vallejo J M, Ruiz-Lopez J F (2007) Calcium oxalates and prehistoric paintings. The usefulness of these biominerals, Journal of Optoelectronics and Advanced Materials, 9, 512-521

Echigo T, Kimata M (2010) Crystal chemistry and genesis of organic minerals: A review of oxalate and polycyclic aromatic hydrocarbon minerals, The Canadian Mineralogist, 48, 1329-1358   [view file]

Izatulina A, Gurzhiy V, Frank-Kamenetskaya O (2014) Weddellite from renal stones: Structure refinement and dependence of crystal chemical features on H2O content, American Mineralogist, 99, 2-7

Sturm E V, Frank-Kamenetskaya O, Vlasov D, Zelenskaya M, Sazanova K, Rusakov A, Kniep R (2015) Crystallization of calcium oxalate hydrates by interaction of calcite marble with fungus aspergillus niger, American Mineralogist, 100, 2559-2565

Mills S J, Christy A G (2016) The Great Barrier Reef Expedition 1928–29: The crystal structure and occurrence of weddellite, ideally CaC2O4·2.5H2O, from the Low Isles, Queensland, Mineralogical Magazine, 80, 399-406

Piro O E, Baran E J (2018) Crystal chemistry of organic minerals-salts of organic acids: the synthetic approach, Crystallography Reviews, 24, 149-175