Opal R060652 - RRUFF Database: Raman, X-ray, Infrared, and Chemistry

Opal R060652

Name: Opal
RRUFF ID: R060652
Ideal Chemistry: SiO₂·nH₂O
Locality: Ethiopia
Source: Gemological Institute of America 23128 [view label]
Owner: RRUFF
Description: Colorless cloudy glassy fragment, variety opal-C
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis

Quick search: [ All Opal samples (11) ]

CHEMISTRY

RRUFF ID:	R060652.2
Sample Description:	Microprobe Fragment
Measured Chemistry:	(Si_0.98Al_0.02)_Σ=1(O_1.98(OH)_0.02)_Σ=2·0.57H₂O; OH estimated by charge balance; H₂O by difference
Microprobe Data File:	[ Download Excel File ]

RAMAN SPECTRUM

RRUFF ID:

Sample Description:

Unoriented sample

Instrument settings:

Thermo Almega XR 532nm @ 100% of 150mW

DOWNLOADS:

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

POWDER DIFFRACTION

RRUFF ID:

R060652.1

Sample Description:

powder

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 Opal
Hoffmann C A S (1789) Mineralsystem des Herrn Inspektor Werners mit dessen erlaubnis herausgegeben von C A S Hoffmann, Bergmannisches Journal, 1, 369-398 [view file]
Sanders J V (1975) Microstructure and crystallinity of gem opals, American Mineralogist, 60, 749-757
Petruk W, Farrell D M, Laufer E E, Tremblay R J, Manning P G (1977) Nontronite and ferruginous opal from the Peace River iron deposit in Alberta, Canada, The Canadian Mineralogist, 15, 14-21 [view file]
Guthrie G D, Bish D L, Reynolds R C (1995) Modeling the X-ray diffraction pattern of opal-CT, American Mineralogist, 80, 869-872 [view file]
Nagase T, Akizuki M (1997) Texture and structure of opal-CT and opal-C in volcanic rocks, The Canadian Mineralogist, 35, 947-958 [view file]
Ostrooumov M, Fritsch E, Lasnier B, Lefrant S (1999) Spectres Raman des opales : aspect diagnostique et aide à la classification, European Journal of Mineralogy, 11, 899-908
Rodgers K A, Hampton W A (2003) Laser Raman identification of silica phases comprising microtextural components of sinters, Mineralogical Magazine, 67, 1-13 [view file]
Smith B Y, Turner S J, Rodgers K A (2003) Opal-A and associated microbes from Wairakei, New Zealand: the first 300 days, Mineralogical Magazine, 67, 563-579 [view file]
Ilieva A, Mihailova B, Tsintsov Z, Petrov O (2007) Structural state of microcrystalline opals: a Raman spectroscopic study, American Mineralogist, 92, 1325-1333 [view file]
Pewkliang B, Pring A, Brugger J (2008) The formation of precious opal: Clues from the opalization of bone, The Canadian Mineralogist, 46, 139-149 [view file]

REFERENCES for Opal

Hoffmann C A S (1789) Mineralsystem des Herrn Inspektor Werners mit dessen erlaubnis herausgegeben von C A S Hoffmann, Bergmannisches Journal, 1, 369-398 [view file]

Sanders J V (1975) Microstructure and crystallinity of gem opals, American Mineralogist, 60, 749-757

Petruk W, Farrell D M, Laufer E E, Tremblay R J, Manning P G (1977) Nontronite and ferruginous opal from the Peace River iron deposit in Alberta, Canada, The Canadian Mineralogist, 15, 14-21 [view file]

Guthrie G D, Bish D L, Reynolds R C (1995) Modeling the X-ray diffraction pattern of opal-CT, American Mineralogist, 80, 869-872 [view file]

Nagase T, Akizuki M (1997) Texture and structure of opal-CT and opal-C in volcanic rocks, The Canadian Mineralogist, 35, 947-958 [view file]

Ostrooumov M, Fritsch E, Lasnier B, Lefrant S (1999) Spectres Raman des opales : aspect diagnostique et aide à la classification, European Journal of Mineralogy, 11, 899-908

Rodgers K A, Hampton W A (2003) Laser Raman identification of silica phases comprising microtextural components of sinters, Mineralogical Magazine, 67, 1-13 [view file]

Smith B Y, Turner S J, Rodgers K A (2003) Opal-A and associated microbes from Wairakei, New Zealand: the first 300 days, Mineralogical Magazine, 67, 563-579 [view file]

Ilieva A, Mihailova B, Tsintsov Z, Petrov O (2007) Structural state of microcrystalline opals: a Raman spectroscopic study, American Mineralogist, 92, 1325-1333 [view file]

Pewkliang B, Pring A, Brugger J (2008) The formation of precious opal: Clues from the opalization of bone, The Canadian Mineralogist, 46, 139-149 [view file]