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uzonite

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Journal Article
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1463–1468.
...Luca Bindi; Valentina Popova; Paola Bonazzi Abstract The crystal structure of uzonite from the Uzon caldera, Kamchatka, Russian Federation, has been refined in space group P 2 1 / m to a final R index of 2.66%. Unit-cell parameters are: a 7.973(2), b 8.096(2), c 7.148(2) Å, β 101.01(2)°, V 452.9(2...
FIGURES
Image
As 4 S 5  cage as found in <b>uzonite</b>. Dark gray As atoms, light gray S atoms....
Published: 01 September 2006
Fig. 4. As 4 S 5 cage as found in uzonite. Dark gray As atoms, light gray S atoms.
Image
The crystal structure of <b>uzonite</b>. The unit cell is outlined. The red and ye...
Published: 01 December 2003
F ig . 1. The crystal structure of uzonite. The unit cell is outlined. The red and yellow circles refer to the As and S atoms, respectively.
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INTRAMOLECULAR BOND DISTANCES (Å) AND ANGLES (°) FOR <b>UZONITE</b>
Published: 01 December 2003
TABLE 2. INTRAMOLECULAR BOND DISTANCES (Å) AND ANGLES (°) FOR UZONITE
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The structure of <b>uzonite</b> projected down [001]. The red and yellow circles r...
Published: 01 December 2003
F ig . 2. The structure of uzonite projected down [001]. The red and yellow circles refer to the As and S atoms, respectively.
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CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR <b>UZONITE</b>
Published: 01 December 2003
TABLE 3. CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR UZONITE
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CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR <b>UZONITE</b>
Published: 01 December 2003
TABLE 3. CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR UZONITE
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CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR <b>UZONITE</b>
Published: 01 December 2003
TABLE 3. CALCULATED AND OBSERVED X-RAY POWDER-DIFFRACTION DATA FOR UZONITE
Journal Article
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1222–1229.
.... These results display that the phenomenon is more complex. The alteration of realgar with the presence of the air yields pararealgar along with arsenolite, a small quantity of uzonite and amorphous material, and when the air is not present pararealgar is the only product. In the first case, when annealing...
FIGURES | View All (8)
Journal Article
Published: 01 July 2005
American Mineralogist (2005) 90 (7): 1108–1114.
.... The unit-cell parameters were measured after each exposure. The results showed that the As 4 S 5 molecules do not undergo any transformations, as previously found by exposing uzonite to light. * E-mail: paola.bonazzi@geo.unifiit 18 12 2004 04 09 2004 © 2005 American Mineralogist...
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FRACTIONAL COORDINATES AND ANISOTROPIC DISPLACEMENT PARAMETERS OF ATOMS IN ...
Published: 01 December 2003
TABLE 1. FRACTIONAL COORDINATES AND ANISOTROPIC DISPLACEMENT PARAMETERS OF ATOMS IN UZONITE
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The first segment of the XRPD pattern (10–45° 2θ) of the sample AR, showing...
Published: 01 May 2015
Figure 5 The first segment of the XRPD pattern (10–45° 2θ) of the sample AR, showing three of the most intense peaks of uzonite.
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Molecules forming crystal structures of arsenic sulfides: (a) realgar, (b) ...
Published: 01 January 2006
Figure 43. Molecules forming crystal structures of arsenic sulfides: (a) realgar, (b) pararealgar, (c) dimorphite, (d) uzonite. As: small dark spheres, S: large white spheres.
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( a ) A layer in the structure of the orthorhombic As 4 S 5  phase projecte...
Published: 01 April 2007
F igure 3. ( a ) A layer in the structure of the orthorhombic As 4 S 5 phase projected down [011]. Each layer can be described as a sequence of two kinds of rod (A and B) parallel to [102̅]. Similar rods are found in the structure of uzonite along ( b ) [11̅0] and ( c ) [101].
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Unit-cell volume  versus  length of exposure to light. The filled squares r...
Published: 01 December 2003
refer to the uzonite crystal reported on in this study.
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 617–620.
...F igure 3. ( a ) A layer in the structure of the orthorhombic As 4 S 5 phase projected down [011]. Each layer can be described as a sequence of two kinds of rod (A and B) parallel to [102̅]. Similar rods are found in the structure of uzonite along ( b ) [11̅0] and ( c ) [101]. ...
FIGURES | View All (4)
Journal Article
Published: 01 March 2016
European Journal of Mineralogy (2016) 28 (1): 147–151.
...-dimorphites, As 4 S 3 ( Whitfield, 1970 , 1973a ), three polymorphic As 4 S 4 forms [ i.e. realgar ( Mullen & Nowacki, 1972 ), pararealgar ( Bonazzi et al. , 1995 ) and bonazziite ( Porter & Sheldrick, 1972 ; Bindi et al. , 2015 )], uzonite, As 4 S 5 ( Whitfield, 1973b ; Bindi et al. , 2003...
FIGURES
Journal Article
Published: 01 June 2014
Mineralogical Magazine (2014) 78 (3): 693–702.
... a structure very close to that observed for the [M 6 S 9 ] bundle-like unit in wakabayashilite and in uzonite (i.e. 230 and 339 cm −1 ; see sample R100020 belonging to the RRUFF collection). Chemical analyses clearly indicate that minor amounts of Cu, Zn, Tl seem to be rather common for wakabayashilite...
FIGURES
Journal Article
Published: 01 September 2006
European Journal of Mineralogy (2006) 18 (5): 589–599.
...Fig. 4. As 4 S 5 cage as found in uzonite. Dark gray As atoms, light gray S atoms. ...
FIGURES | View All (12)
Journal Article
Published: 01 October 2005
American Mineralogist (2005) 90 (10): 1563–1570.
.... Berlepsch, P., Miletich, R., and Armbruster, T. ( 1999 ) The crystal structures of synthetic KSb 5 S 8 and (Tl 0.598 ,K 0.402 )Sb 5 S 8 and their relation to parapierrotite (TlSb 5 S 8 ). Zeitschrift für Kristallographie , 214 , 57 –63. Bindi, L., Popova, V., and Bonazzi, P. ( 2003 ) Uzonite, As 4...
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