Variscite R040180



Name: Variscite
RRUFF ID: R040180
Ideal Chemistry: Al(PO4)·2H2O
Locality: de Linde mine, Montgomery County, Arkansas, USA
Source: University of Arizona Mineral Museum 12853 [view label]
Owner: RRUFF
Description: Indistinct green crystals forming a glassy crust
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Variscite samples (4) ]
CHEMISTRY 
RRUFF ID: R040180.2
Sample Description: Microprobe Fragment
Measured Chemistry: Al0.98P1.00O4·2H2O
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R040180
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Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R040180.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 9.778(4)Å    b: 8.531(2)Å    c: 9.586(4)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 799.6(5)Å3    Crystal System: orthorhombic
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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.

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REFERENCES for Variscite

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]

Breithaupt J F A (1837) Bestimmung neuer Mineralien. 4. Variscit, Journal für Praktische Chemie, 10, 506-508   [view file]

Larsen E S, Schaller W T (1925) The identity of variscite and peganite and the dimorphous form, metavariscite, American Mineralogist, 10, 23-28   [view file]

Larsen E S, Shannon E V (1930) The minerals of the phosphate nodules from near Fairfield, Utah, American Mineralogist, 15, 307-337   [view file]

Fleischer M (1963) New mineral names, American Mineralogist, 48, 1413-1421   [view file]

International Mineralogical Association (1967) Commission on new minerals and mineral names, Mineralogical Magazine, 36, 131-136   [view file]

Salvador P S, Fayos J (1972) Some aspects of the structural relationship between "Messbach-type" and "Lucin-type" variscites, American Mineralogist, 57, 36-44   [view file]

Bailey S W (1977) Report of the I.M.A-I.U.Cr. Joint Committee on Nomenclature, American Mineralogist, 62, 411-415   [view file]

Kniep R, Mootz D, Vegas A (1977) Variscite, Acta Crystallographica, B33, 263-265

Friedman S P, Medvedeva N I, Nazarova G S, Gubanov V A (1992) Electronic structure and chemical bonding in variscite crystals, Journal of Structural Chemistry, 32, 631-636

Dick S (1997) The structure of GaAsO4•2H2O: A new member of the variscite family, Zeitschrift für Naturforschung B Chemical Science, 52, 1337-1340

Loiseau T, Paulet C, Ferey G (1998) Crystal structure determination of the hydrated gallium phosphate GaPO4·2H2O, analog of variscite, Chimie de L'état Solide et Cristallochimie, 11, 667-674

Tang X, Gentiletti M J, Abdessadek L (2001) Synthesis and crystal structure of indium arsenate and phosphate dihydrates with variscite and metavariscite structure types, Journal of Chemical Crystallography, 31, 45-50

Frost R L, Weier M L, Erickson K L, Carmody O, Mills S J (2004) Raman spectroscopy of phosphates of the variscite mineral group, Journal of Raman Spectroscopy, 35, 1047-1055   [link]

Taxer K, Bartl H (2004) On the dimorphy between the variscite and clinovariscite group: refined finestructural relationship of strengite and clinostrengite, Fe(PO4)·2H2O, Crystal Research and Technology, 39, 1080-1088

Calas G, Galoisy L, Kiratisin A (2005) The origin of the green color of variscite, American Mineralogist, 90, 984-990   [view file]

Oxmann J F, Pham Q H, Lara R J (2008) Quantification of individual phosphorus species in sediment: a sequential conversion and extraction method, European Journal of Soil Science, 59, 1177-1190   [view file]

Rossi M, Rizzi R, Vergara A, Capitelli F, Altomare A, Bellatreccia F, Saviano M, Ghiara R M (2017) Compositional variation of turquoise-group minerals from the historical collection of the Real Museo Mineralogico of the University of Naples, Mineralogical Magazine, 81, 1405-1429