" R050399 - RRUFF Database: Raman, X-ray, Infrared, and Chemistry

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Magnesiochromite R050399

Name: Magnesiochromite
RRUFF ID: R050399
Ideal Chemistry: MgCr₂O₄
Locality: Troodos Mountains, Cyprus
Source: Andy McCarthy
Owner: RRUFF
Description: Black grains
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis

Mineral Group: [ Spinel (66) ]

Quick search: [ All Magnesiochromite samples (3) ]

CHEMISTRY

RRUFF ID:	R050399.2
Sample Description:	Microprobe fragment
Measured Chemistry:	(Mg_0.68Fe²⁺_0.32)_Σ=1(Cr_1.29Al_0.64Fe³⁺_0.07)_Σ=2O4
Microprobe Data File:	[ Download Excel File ]

RAMAN SPECTRUM

RRUFF ID:

Sample Description:

Sample is oriented and mounted on a pin.

Pin ID:

M01485

Orientation:

Laser parallel to a* (1 0 0). Fiducial mark perpendicular to laser is parallel to c [0 0 1].

DOWNLOADS:

To download sample data,
please select a specific
orientation angle.

BROAD SCAN WITH SPECTRAL ARTIFACTS

RRUFF ID:

R050399

Wavelength:

Sample Description:

Unoriented sample

Instrument settings:

Thermo Almega XR 532nm @ 100% of 150mW

DOWNLOADS:

	Raman Data (Processed)
	RRUFF File
	Raman Data (RAW)
	RRUFF File

INFRARED SPECTRUM (Attenuated Total Reflectance)

RRUFF ID:

R050399.1

Instrument settings:

SensIR Durascope on a Nicolet Magna 860 FTIR

Resolution:

DOWNLOADS:

	Infrared Data (Processed)
	RRUFF File

POWDER DIFFRACTION

RRUFF ID:

R050399.1

Sample Description:

Powder

Cell Refinement Output:

a: 8.2792(2)Å b: 8.2792(2)Å c: 8.2792(2)Å
alpha: 90° beta: 90° gamma: 90° Volume: 567.49(3)Å³ Crystal System: cubic

File Type Information

Calculated diffraction file.

File Type Information

Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

File Type Information

Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

DOWNLOADS:

	Cell Refinement Data
	Cell Refinement Output Data
	DIF File
	X-ray Data (XY - Processed)
	RRUFF File
	X-ray Data (XY - RAW)
	RRUFF File

REFERENCES for Magnesiochromite
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]
Websky M (1873) Ueber Grochauit und Magnochromit, Zeitschrift der Deutschen Geologischen Gesellschaft, 25, 394-398 [view file]
Spencer L J (1913) A (sixth) list of new mineral names, Mineralogical Magazine, 16, 352-378 [view file]
Verwey E J W, Heilmann E L (1947) Physical properties and cation arrangement of oxides with spinel structures, Journal of Chemical Physics, 15, 174-180
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]
Roeder P L (1994) Chromite: from the fiery rain of chondrules to the Kilauea Iki Lava Lake, The Canadian Mineralogist, 32, 729-746 [view file]
Klemme S, O'Neill H St C (1997) The reaction MgCr₂O₄ + SiO₂ = Cr₂O₃ + MgSiO₃ of formation of magnesiochromite (MgCr₂O₄), Contributions to Mineralogy and Petrology, 130, 59-65
Lenaz D, Prinicivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and outer Dinarides: The discrimination of supplies from areas of similar tectonic setting?, The Canadian Mineralogist, 43, 1305-1314 [view file]
Nestola F, Periotto B, Andreozzi G B, Bruschini E, Bosi F (2014) Pressure-volume equation of state for chromite and magnesiochromite: A single-crystal X-ray diffraction investigation, American Mineralogist, 99, 1248-1253
Ishii T, Kojitani H, Fujino K, Yusa H, Mori D, Inaguma Y, Matsushita Y, Yamaura K, Akaogi M (2015) High-pressure high-temperature transitions in MgCr₂O₄ and crystal structures of new Mg₂Cr₂O₅ and post-spinel MgCr₂O₄ phases with implications for ultrahigh-pressure chromitites in ophiolites, American Mineralogist, 100, 59-65
Bosi F, Biagioni C, Pasero M (2019) Nomenclature and classification of the spinel supergroup, European Journal of Mineralogy, 31, 183-192 [view file]

REFERENCES for Magnesiochromite

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]

Websky M (1873) Ueber Grochauit und Magnochromit, Zeitschrift der Deutschen Geologischen Gesellschaft, 25, 394-398 [view file]

Spencer L J (1913) A (sixth) list of new mineral names, Mineralogical Magazine, 16, 352-378 [view file]

Verwey E J W, Heilmann E L (1947) Physical properties and cation arrangement of oxides with spinel structures, Journal of Chemical Physics, 15, 174-180

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]

Roeder P L (1994) Chromite: from the fiery rain of chondrules to the Kilauea Iki Lava Lake, The Canadian Mineralogist, 32, 729-746 [view file]

Klemme S, O'Neill H St C (1997) The reaction MgCr₂O₄ + SiO₂ = Cr₂O₃ + MgSiO₃ of formation of magnesiochromite (MgCr₂O₄), Contributions to Mineralogy and Petrology, 130, 59-65

Lenaz D, Prinicivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and outer Dinarides: The discrimination of supplies from areas of similar tectonic setting?, The Canadian Mineralogist, 43, 1305-1314 [view file]

Nestola F, Periotto B, Andreozzi G B, Bruschini E, Bosi F (2014) Pressure-volume equation of state for chromite and magnesiochromite: A single-crystal X-ray diffraction investigation, American Mineralogist, 99, 1248-1253

Ishii T, Kojitani H, Fujino K, Yusa H, Mori D, Inaguma Y, Matsushita Y, Yamaura K, Akaogi M (2015) High-pressure high-temperature transitions in MgCr₂O₄ and crystal structures of new Mg₂Cr₂O₅ and post-spinel MgCr₂O₄ phases with implications for ultrahigh-pressure chromitites in ophiolites, American Mineralogist, 100, 59-65

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