Pararealgar R150123



Name: Pararealgar
RRUFF ID: R150123
Ideal Chemistry: As4S4
Locality: U.S. Borax mine, Kramer Borate deposit, Boron, California, USA
Source: Michael Scott S106210 [view label]
Owner: RRUFF
Description: Yellowish-orange granular, within a rind of realgar
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Pararealgar samples (2) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R150123
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 1% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R150123.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 9.937(5)Å    b: 9.687(6)Å    c: 8.532(5)Å
alpha: 90°    beta: 97.16(2)°    gamma: 90°   Volume: 815(1)Å3    Crystal System: monoclinic
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Calculated diffraction file.

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

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REFERENCES for Pararealgar

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]

Roberts A C, Ansell H G, Bonardi M (1980) Pararealgar, a new polymorph of AsS, from British Columbia, The Canadian Mineralogist, 18, 525-527   [view file]

Fleischer M, Cabri L J (1981) New mineral names, American Mineralogist, 66, 1274-1280   [view file]

Douglass D L, Shing C, Wang G (1992) The light-induced alteration of realgar to pararealgar, American Mineralogist, 77, 1266-1274   [view file]

Bonazzi P, Menchetti S, Pratesi G (1995) The crystal structure of pararealgar, As4S4, American Mineralogist, 80, 400-403   [view file]

Ballirano P, Maras A (2006) In-situ X-ray transmission powder diffraction study of the kinetics of the light induced alteration of realgar (α-As4S4), European Journal of Mineralogy, 18, 589-599

Bonazzi P, Bindi L, Pratesi G, Menchetti S (2006) Light-induced changes in molecular arsenic sulfides: State of the art and new evidence by single-crystal X-ray diffraction, American Mineralogist, 91, 1323-1330   [view file]

Naumov P, Makreski P, Jovanovski G (2007) Direct atomic scale observations of linkage isomerization of As4S4 clusters during the photinduced transition of realgar to pararealgar, Inorganic Chemistry, 46, 10624-10631

Bonazzi P, Bindi L (2008) A crystallographic review of arsenic sulfides: Effects of chemical variations and changes induced by exposure to light, Zeitschrift für Kristallographie, 223, 132-147