Gahnite R040027

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Record 1 of 4  

Name: Gahnite
RRUFF ID: R040027
Ideal Chemistry: ZnAl2O4
Locality: Rowe, Franklin County, Massachusetts, USA
Source: University of Arizona Mineral Museum 11402 [view label]
Owner: RRUFF
Description: Dark blue octahedral single crystals embedded in quartz matrix
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Spinel (66) ]
Quick search: [ All Gahnite samples (4) ]
RRUFF ID: R040027.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Zn0.83Fe0.11Mg0.06)Σ=1(Al0.96Fe0.04)Σ=2O4
Microprobe Data File: [ Download Excel File ]
Sample Description: Sample is oriented, mounted onto a pin and polished
Pin ID: L00146
Orientation: Laser parallel to  -c*  (0 0 -1).     Fiducial mark perpendicular to laser is parallel to  -a   [-1 0 0].

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RRUFF ID: R040027
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R040027.1
Sample Description: Powder
Cell Refinement Output: a: 8.0988(2)Å    b: 8.0988(2)Å    c: 8.0988(2)Å
alpha: 90.°    beta: 90.°    gamma: 90.°   Volume: 531.22(4)Å3    Crystal System: cubic
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
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 Gahnite

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]

von Moll C E F (1807) Uebersicht. Gahnit, aus Fahlun, Efemeriden der Berg- und Huttenkunde, 3, 75-92   [view file]

Saalfeld H (1964) Strukturdaten von gahnit, ZnAl2O4, Zeitschrift für Kristallographie, 120, 476-478   [view file]

Spry P G (1982) An unusual gahnite–forming reaction, Geco base–metal deposit, Manitouwadge, Ontario, The Canadian Mineralogist, 20, 549-553   [view file]

Hicks J A, Moore J M, Reid A M (1985) The co-occurrence of green and blue gahnite in the Namaqualand metamorphic complex, South Africa, The Canadian Mineralogist, 23, 535-542   [view file]

Parr J (1992) A gahnite-garnet retrograde reaction from the Pinnacles deposit, Broken Hill, New South Wales, Australia, The Canadian Mineralogist, 30, 145-152   [view file]

O'Neill H S C, Dollase W A (1994) Crystal structures and cation distributions in simple spinels from Powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4, Physics and Chemistry of Minerals, 20, 541-555   [view file]

Mendenbach O, Shannon R D (1997) Refractive indices and optical dispersion of 103 synthetic and mineral oxides and silicates measured by a small-prism technique, Journal of the Optical Society of America B, 14, 3299-3318

Shannon R D, Shannon R C, Medenbach O, Fischer R X (2002) Refractive index and dispersion of fluorides and oxides, Journal of Physical and Chemical Reference Data, 31, 931-970   [view file]

Heimann A, Spry P G, Teale G S (2005) Zincian spinel associated with metamorphosed proterozoic base-metal sulfide occurrences, Colorado: a re-evaluation of gahnite composition as a guide in exploration, The Canadian Mineralogist, 43, 601-622   [view file]

Reichmann H J, Jacobsen S D (2006) Sound velocities and elastic constants of ZnAl2O4 spinel and implications for spinel-elasticity systematics, American Mineralogist, 91, 1049-1054   [view file]

Popović J, Tkalčec E, Gržeta B, Kurajica S, Rakvin B (2009) Inverse spinel structure of Co-doped gahnite, American Mineralogist, 94, 771-776   [view file]

Ardit M, Cruciani G, Dondi M (2012) Structural relaxation in tetrahedrally coordinated Co2+ along the gahnite-Co-aluminate spinel solid solution, American Mineralogist, 97, 1394-1401   [view file]

D'Ippolito V, Andreozzi G B, Bosi F, Hålenius U, Mantovani L, Bersani D, Fregola R A (2013) Crystallographic and spectroscopic characterization of a natural Zn-rich spinel approaching the endmember gahnite (ZnAl2O4) composition, Mineralogical Magazine, 77, 2941-2953

Medenbach O, Siritanon T, Subramanian M A, Shannon R D, Fischer R X, Rossman G R (2013) Refractive index and optical dispersion of In2O3, InBO3 and gahnite, Materials Research Bulletin, 48, 2240-2243   [view file]

Fregola R A, Skogby H, Bosi F, D'Ippolito V, Andreozzi G B, Hålenius U (2014) Optical absorption spectroscopy study of the causes for color variations in natural Fe-bearing gahnite: Insights from iron valency and site distribution data, American Mineralogist, 99, 2187-2195

Hålenius U, Bosi F (2014) Color of Mn-bearing gahnite: A first example of electronic transitions in heterovalent exchange coupled IVMn2+-VIMn3+ pairs in minerals, American Mineralogist, 99, 261-266

Heimann A, Yonts J A, Galliski M G (2015) The composition of gahnite in granitic pegmatites from the Pampean Pegmatite Province, Argentina: Implications for pegmatite fractionation, The Canadian Mineralogist, 53, 991-1013

Faulstich F R L, Ávila C A, Neumann R, Silveira V S L, Callegario L S (2016) Gahnite from the São João del Rei pegmatitic province, Minas Gerais, Brazil: Chemical composition and genetic implications, The Canadian Mineralogist, 54, 1385-1402

Bosi F, Biagioni C, Pasero M (2019) Nomenclature and classification of the spinel supergroup, European Journal of Mineralogy, 31, 183-192   [view file]

Wehrle E A, McDonald A M, Tinkham D K (2020) Mineral chemistry of gahnite from the Lalor metamorphosed VHMS deposit, Snow Lake, Manitoba, The Canadian Mineralogist, 58, 511-532