Gahnite R070591

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Record 1509 of 4039  

Name: Gahnite
RRUFF ID: R070591
Ideal Chemistry: ZnAl2O4
Locality: Jemaa, Kaduna, Nigeria
Source: James Shigley [view label]
Owner: RRUFF
Description: Blue octahedron
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Spinel (62) ]
Quick search: [ All Gahnite samples (4) ]
CHEMISTRY 
RRUFF ID: R070591.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Zn0.91Fe0.08Mg0.01)Σ=1.00(Al1.99Fe0.01)Σ=2.00O4
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070591
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R070591.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.099(3)Å    b: 8.099(3)Å    c: 8.099(3)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 531.16(6)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.

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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