----- R070444 - RRUFF Database: Raman, X-ray, Infrared, and Chemistry

Guyanaite R070444

Name: Guyanaite
RRUFF ID: R070444
Ideal Chemistry: CrO(OH)
Locality: Merume river, Kamakusa, Mazaruni District, Guyana
Source: Michael Scott S104672 [view label]
Owner: RRUFF
Description: Black alluvial grains, a mixture of guyanaite, bracewellite, eskolaite and quartz, colloquially known as merumite
Status: The identification of this mineral has been confirmed only by X-ray diffraction

RAMAN SPECTRUM

RRUFF ID:

Sample Description:

Unoriented sample

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

BROAD SCAN WITH SPECTRAL ARTIFACTS

RRUFF ID:

R070444

Wavelength:

Sample Description:

Unoriented sample

Instrument settings:

Thermo Almega XR 532nm @ 100% of 150mW

DOWNLOADS:

	Raman Data (RAW)
	RRUFF File

POWDER DIFFRACTION

RRUFF ID:

R070444.1

Sample Description:

Powder, mixture includes bracewellite, eskolaite and quartz

Cell Refinement Output:

a: 4.8773Å b: 4.3111Å c: 2.9547Å
alpha: 90° beta: 90° gamma: 90° Volume: 62.127Å³ Crystal System: orthorhombic

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:

	X-ray Data (XY - Processed)
	RRUFF File
	X-ray Data (XY - RAW)
	RRUFF File

REFERENCES for Guyanaite
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]
Christensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of β-CrOOH and β-CrOOD, Journal of Solid State Chemistry, 19, 299-304
Milton C, Appleman D E, Appleman M H, Chao E C T, Cuttita F, Dinnin J I, Dwornik E J, Ingram B L, Rose H J (1976) Merumite, a complex assemblage of chromium minerals from Guyana, U.S. Geological Survey Professional Paper, 887, 1-29 [view file]
Fleischer M, Cabri L J, Nickel E H, Pabst A (1977) New mineral names, American Mineralogist, 62, 593-600 [view file]
Jahn S, Wunder B, Koch-Müller M, Tarrieu L, Pöhle M, Watenphul A, Taran M N (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, β-CrOOH: evidence from spectroscopy and ab initio simulations, European Journal of Mineralogy, 24, 839-850
Schultze D J, Flemming R L, Shepherd P H M, Helmstaedt H (2014) Mantle-derived guyanaite in a Cr-omphacite xenolith from Moses Rock diatreme, Utah, American Mineralogist, 99, 1277-1283

REFERENCES for Guyanaite

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]

Christensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of β-CrOOH and β-CrOOD, Journal of Solid State Chemistry, 19, 299-304

Milton C, Appleman D E, Appleman M H, Chao E C T, Cuttita F, Dinnin J I, Dwornik E J, Ingram B L, Rose H J (1976) Merumite, a complex assemblage of chromium minerals from Guyana, U.S. Geological Survey Professional Paper, 887, 1-29 [view file]

Fleischer M, Cabri L J, Nickel E H, Pabst A (1977) New mineral names, American Mineralogist, 62, 593-600 [view file]

Jahn S, Wunder B, Koch-Müller M, Tarrieu L, Pöhle M, Watenphul A, Taran M N (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, β-CrOOH: evidence from spectroscopy and ab initio simulations, European Journal of Mineralogy, 24, 839-850

Schultze D J, Flemming R L, Shepherd P H M, Helmstaedt H (2014) Mantle-derived guyanaite in a Cr-omphacite xenolith from Moses Rock diatreme, Utah, American Mineralogist, 99, 1277-1283