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krupkaite

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Journal Article
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 525–539.
...Dan Topa; Václav Petřiček; Michal Dušek; Emil Makovicky; Tonči Balić-Žunić Abstract Crystal structures of intergrown lindströmite and krupkaite were determined in two distinct samples by a simultaneous crystal-structure refinement using a modified jana program package. The exsolution...
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Journal Article
Published: 01 August 2002
The Canadian Mineralogist (2002) 40 (4): 1147–1159.
...Dan Topa; Emil Makovicky; Tonči Balić-Žunić Abstract Crystal structures of stoichiometric gladite (empirical formula Cu 1.32 Pb 1.37 Bi 6.65 S 12.03 ) and krupkaite (empirical formula Cu 2.00 Pb 2.03 Bi 5.99 S 12.04 ) from Felbertal, Austria, were refined to R 1 = 0.045 and 0.037, respectively...
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Journal Article
Published: 01 February 1989
American Mineralogist (1989) 74 (1-2): 250–255.
...Allan Pring Abstract The nature of compositional fields in aikinite and krupkaite has been investigated by electron diffraction and high‐resolution transmission electron microscopy. Variation from ideal composition in these minerals results from the disordered intergrowth of krupkaite units...
Journal Article
Published: 01 April 1975
American Mineralogist (1975) 60 (3-4): 300–308.
...W. G. Mumme Abstract Krupkaite, CuPbBi 3 S 6 , from the Juno Mine at Tennant Creek, Northern Territory, Australia, is orthorhombic, space group Pmc 2 1 with a = 4.003(3), b = 11.200(9), c = 11.560(9) Å. Diffraction data were recorded with an equi-inclination diffractometer equipped...
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CATION-ANION DISTANCES IN THE <span class="search-highlight">KRUPKAITE</span> COMPONENT: COMPARISON WITH THE VALU...
Published: 01 April 2008
TABLE 8. CATION-ANION DISTANCES IN THE KRUPKAITE COMPONENT: COMPARISON WITH THE VALUES FOR PURE KRUPKAITE
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A. Kupčíkite (kup) in association with <span class="search-highlight">krupkaite</span> (krp) replaced by emplecti...
Published: 01 April 2012
Fig. 2 A. Kupčíkite (kup) in association with krupkaite (krp) replaced by emplectite (emp). B. Aggregates of paděraite laths (pad) replaced by hodrušite (hod) and emplectite (emp); the bright grain is gold (Au). C. Aggregates of laths of paděraite (pad), hodrušite (hod), emplectite (emp
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Back scattered electron images showing skeletal intergrowths of <span class="search-highlight">krupkaite</span> w...
Published: 01 July 2000
Fig. 2. Back scattered electron images showing skeletal intergrowths of krupkaite with gladite and makovickyite-bearing assemblages. (a) Area of nebulous ‘cloud’-like intergrowths (lighter grey) in krupkaite. Homogeneous gladite on left of picture hosts tetradymite. (b) Close-up of ‘cloud’-like
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(a) The crystal structure of oversubstituted gladite ( n  aik  = 39). (b) T...
Published: 01 August 2002
F ig . 4. (a) The crystal structure of oversubstituted gladite ( n aik = 39). (b) The crystal structure of oversubstituted krupkaite ( n aik = 59). The fully occupied Cu positions are indicated in red, the partly occupied ones (22% in gladite, 12% in krupkaite) in blue.
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(a) The crystal structure of oversubstituted gladite ( n  aik  = 39). (b) T...
Published: 01 August 2002
F ig . 4. (a) The crystal structure of oversubstituted gladite ( n aik = 39). (b) The crystal structure of oversubstituted krupkaite ( n aik = 59). The fully occupied Cu positions are indicated in red, the partly occupied ones (22% in gladite, 12% in krupkaite) in blue.
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a. A lamella of copper-oversubstituted gladite (bd 39 ) (the subscript indi...
Published: 01 June 2005
F ig . 4. a. A lamella of copper-oversubstituted gladite (bd 39 ) (the subscript indicates the n aik value, explained in the caption to Table 2 ) with incipient exsolution; above it is a large crystal of salzburgite (bd 40 ) with lamellae of krupkaite (bd 48 ). Grains of native bismuth, Bi
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Photomicrographs demonstrating sulfosalt-telluride-native element relations...
Published: 01 February 2013
Fig. 4 Photomicrographs demonstrating sulfosalt-telluride-native element relationships in Stanos mineralization (a) Pyrite (Py) surrounded by an intergrowth of gladite, krupkaite, bismuthinite (Bmt) and unnamed CuPbBi 7 S 12 . Native bismuth and quartz are also present (sample B, reflected light
Journal Article
Published: 01 February 2002
The Canadian Mineralogist (2002) 40 (1): 239–245.
... of the bismuthinite – krupkaite – aikinite solid-solution series. A refinement of the crystal structure was made with single-crystal measurements, which included 2943 observed unique reflections (I > 2σ I ) and resulted in R 1 = 6.6% ( R W = 22.4%). The crystal structure is composed of a fairly complex sequence...
FIGURES
Journal Article
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1377–1382.
... cell of this “fivefold derivative” contains two “bismuthinite-like” Bi 4 S 6 ribbons and eight “krupkaite-like” CuPbBi 3 S 6 ribbons. The fully occupied Cu sites occur in zigzag [001] rows at y = 0.15, 0.30, 0.70 and 0.85, comprising gladite-like and krupkaite-like intervals in the structure in regular...
FIGURES
Journal Article
Published: 01 December 1995
American Mineralogist (1995) 80 (11-12): 1166–1173.
... variation within the annealed products. HRTEM was used to monitor Cu ordering and revealed that the distribution of Cu and Pb in the cell is not that of hammarite but of a lower symmetry supercell consisting of the intergrowth of one aikinite cell (two aikinite units) with two krupkaite cells (four...
Journal Article
Published: 01 February 1976
American Mineralogist (1976) 61 (1-2): 15–20.
..., 1974) has established CuPbBi 3 S 6 as a distinct species, to which the name krupkaite has been given. The Z n principle (Moore, 1967) proposed for classification of bismuthinite derivatives has not been followed by the crystal structures found for krupkaite, CuPbBi 3 S 6 , and pekoite, CuPbBi 11 S 18...
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POLYHEDRON CHARACTERISTICS FOR THE <span class="search-highlight">KRUPKAITE</span> STRUCTURES REFINED
Published: 01 August 2002
TABLE 6. POLYHEDRON CHARACTERISTICS FOR THE KRUPKAITE STRUCTURES REFINED
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ANISOTROPIC DISPLACEMENT PARAMETERS OF ATOMS IN THE <span class="search-highlight">KRUPKAITE</span> COMPONENT OF:...
Published: 01 April 2008
TABLE 6. ANISOTROPIC DISPLACEMENT PARAMETERS OF ATOMS IN THE KRUPKAITE COMPONENT OF:
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POSITIONAL PARAMETERS AND B eq &#x2F;B iso  VALUES OF ATOMS IN THE <span class="search-highlight">KRUPKAITE</span> COM...
Published: 01 April 2008
TABLE 5. POSITIONAL PARAMETERS AND B eq /B iso VALUES OF ATOMS IN THE KRUPKAITE COMPONENT OF:
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POLYHEDRON CHARACTERISTICS FOR CATION POLYHEDRA IN THE <span class="search-highlight">KRUPKAITE</span> COMPONENT
Published: 01 April 2008
TABLE 10. POLYHEDRON CHARACTERISTICS FOR CATION POLYHEDRA IN THE KRUPKAITE COMPONENT
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LINDSTRÖMITE-<span class="search-highlight">KRUPKAITE</span> INTERGROWTHS: EXPERIMENTAL AND REFINEMENT DATA
Published: 01 April 2008
TABLE 2. LINDSTRÖMITE-KRUPKAITE INTERGROWTHS: EXPERIMENTAL AND REFINEMENT DATA