Weddellite R050242
Name: Weddellite
RRUFF ID: R050242
Ideal Chemistry: CaC2O4·2H2O
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
CHEMISTRY 
RRUFF ID: R050242.2
Sample Description: Microprobe fragment
Measured Chemistry: Ca1.00(C2O4)ยท2H2O ; C not measured
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050242
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 40% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050242.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
Resolution:
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Infrared Data (Processed)
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POWDER DIFFRACTION 
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)    Crystal System: tetragonal
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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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Cell Refinement Data
Cell Refinement Output Data
DIF File
X-ray Data (XY - Processed)
RRUFF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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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]

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) Raman spectroscopy of natural oxalates at 298 and 77 K, Journal of Raman Spectroscopy, 34, 776-785   [link]

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