Alacránite R140323

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Name: Alacránite
RRUFF ID: R140323
Ideal Chemistry: As8S9
Locality: Solfatara di Pozzuoli, Napoli, Italy
Source: Renato and Adriana Pagano [view label]
Owner: RRUFF
Description: Yellow crystals with red realgar. 2-fold twin around [1 1 0].
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Not in a structural group (133) ]
Quick search: [ All Alacránite 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: R140323
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 1% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R140323.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 9.948(5)Å    b: 9.579(6)Å    c: 9.140(5)Å
alpha: 90°    beta: 102.42(2)°    gamma: 90°   Volume: 850.5(11)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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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Alacránite

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]

Popova V I, Popov V A, Clark A, Polyakov V O, Borisovskii S E (1986) Alacránite, As8S9–a new mineral, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 115, issue 3 360-368   [view file]

Popova V I, Popov V A, Clark A, Polyakov V O, Borisovski S E (1986) Alacránite As8S9; a new mineral, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 115, issue 3 360-368

Hawthorne F C, Burke E A J, Ercit T S, Grew E S, Grice J D, Jambor J L, Puziewicz J, Roberts A C, Vanko D A (1988) New mineral names, American Mineralogist, 73, 189-199   [view file]

Burns P C, Percival J B (2001) Alacranite, As4S4: a new occurrence, new formula, and determination of the crystal structure, The Canadian Mineralogist, 39, 809-818   [view file]

Jambor J L, Roberts A C (2002) New mineral names, American Mineralogist, 87, 355-358   [view file]

Bonazzi P, Bindi L, Olmi F, Menchetti S (2003) How many alacranites do exist? A structural study of non-stoichiometric As8S9-x crystals, European Journal of Mineralogy, 15, 283-288

Bonazzi P, Bindi L, Popova V, Pratesi G, Menchetti S (2003) Alacranite, As8S9: structural study of the holotype and re-assignment of the original chemical formula, American Mineralogist, 88, 1796-1800   [view file]

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]

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

Ballirano P (2012) Thermal behavior of realgar As4S4, and of arsenolite As2O3 and non-stoichiometric As8S8+x crystals produced from As4S4 melt recrystallization, American Mineralogist, 97, 1320-1329   [view file]

Pratesi G, Zoppi M (2015) An insight into the inverse transformation of realgar altered by light, American Mineralogist, 100, 1222-1229