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krennerite

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Journal Article
Published: 01 November 2013
American Mineralogist (2013) 98 (11-12): 2086–2095.
...Weina Xu; Jing Zhao; Joël Brugger; Guorong Chen; Allan Pring Abstract Calaverite, krennerite, and sylvanite are Au-Ag-tellurides with close compositions and related crystal structures. Previous experimental studies show that both calaverite and sylvanite transform to porous “mustard” gold under...
FIGURES | View All (6)
Journal Article
Published: 01 February 2012
The Canadian Mineralogist (2012) 50 (1): 119–127.
...Matthew D. Dye; Joseph R. Smyth Abstract The crystal structure of a natural krennerite (Au 3 AgTe 8 ) from Cripple Creek, Colorado, USA has been refined in space group Pma 2 using 3,151 observed unique (acentric) reflections. The final R value for observed reflections was 0.022. Unit cell...
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Journal Article
Published: 01 February 1995
The Canadian Mineralogist (1995) 33 (1): 185–188.
Journal Article
Published: 01 March 1994
The Canadian Mineralogist (1994) 32 (1): 189–201.
Journal Article
Published: 01 December 1950
American Mineralogist (1950) 35 (11-12): 959–984.
...George Tunell; K. J. Murata Abstract The crystal structure of krennerite has been analyzed by means of Weissenberg photographs and powder diffraction photographs. The dimensions of the unit cell, all determined rcSntgenographically, are a 0 = 16.54 Å, b 0 =8.82 Å, c 0 =4.46 Å, all ±0.03...
Journal Article
Published: 01 May 1937
American Mineralogist (1937) 22 (5): 667–674.
... (1931). That of sylvanite and krennerite has long been known. Copyright © 1937 by the Mineralogical Society of America 1937 Mineralogical Society of America ...
Image
<span class="search-highlight">Krennerite</span> (Knn) grain enclosed by optically continuous sylvanite (Syl). No...
Published: 01 February 2012
Fig. 4 Krennerite (Knn) grain enclosed by optically continuous sylvanite (Syl). Note the partial fragmentation of the krennerite grain prior to sylvanite mineralization. Crossed polars, 50× magnification.
Image
Kinetics of the replacement of <span class="search-highlight">krennerite</span> by Au-Ag alloy at different pHs a...
Published: 01 November 2013
Figure 6 Kinetics of the replacement of krennerite by Au-Ag alloy at different pHs and temperatures [for all solutions: (Cl − ) = 0.01 m , S/F = 0.67 g/L]. ( a – f ) Avrami plots showing the linear regression (fit parameters listed in Table 1 ) for the different runs at different pHs
Image
Projections of the crystal structures and major reaction paths for the repl...
Published: 01 November 2013
Figure 2 Projections of the crystal structures and major reaction paths for the replacement of sylvanite, calaverite, and krennerite. Crystal structure data from Dye and Smyth (2012) for krennerite; Pertlik (1984a) for sylvanite; and Bindi et al. (2009) for calaverite. (Color online.)
Image
The polyhedral structure of <span class="search-highlight">krennerite</span> parallel to [001].
Published: 01 February 2012
Fig. 1 The polyhedral structure of krennerite parallel to [001].
Image
<span class="search-highlight">Krennerite</span> grain enclosed by optically continuous sylvanite. Note the assoc...
Published: 01 February 2012
Fig. 5 Krennerite grain enclosed by optically continuous sylvanite. Note the associationwith arsenian tetrahedrite (aTd). Crossed polars, 100× magnification.
Image
Ellipsoidal model of <span class="search-highlight">krennerite</span> sample 1641 perpendicular to [001]. Au-site...
Published: 01 February 2012
Fig. 2 Ellipsoidal model of krennerite sample 1641 perpendicular to [001]. Au-site numbers are labeled for reference.
Journal Article
Published: 01 December 1968
The Canadian Mineralogist (1968) 9 (4): 547–551.
...L. J. Cabri; J. C. Rucklidge Electron-probe microanalyses of natural krennerites and sylvanites, containing no minor elements, have supported previous estimates of silver content using a d-value curve obtained from synthetic samples. The correspondence for the silver content of natural calaverite...
Journal Article
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 611–618.
... , sylvanite AuAgTe 4 and krennerite Au 3 AgTe 8 , which are based upon sheet structures with no connecting inter-sheet atoms. It also differs fundamentally from the structures of synthetic phases Ag 3 TlTe 2 and Ag 18 Tl 4 Te 11 , both of which have an analogous stoichiometry. In contrast to the pyramidal...
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Journal Article
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1503–1524.
..., melonite, hessite, stützite, krennerite and sylvanite are rare in the main and caunter lodes. In addition, hessite and montbrayite are found in trace amounts in the cross and main lodes, respectively. There is no systematic distribution of tellurides within a given lode. Tellurides in Fimiston-style ores...
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Journal Article
Journal: Economic Geology
Published: 01 September 1960
Economic Geology (1960) 55 (6): 1148–1178.
..., Western Australia, and Vatukoula, Fiji. Calaverite is the most abundant telluride mineral at Kalgoorlie; krennerite, indicated by the experimental results to be the low-temperature, low-pressure polymorph of AuTe 2 , is subordinate, suggesting somewhat higher temperatures and pressures than those...
Image
Secondary electron images showing reaction textures from hydrothermal react...
Published: 01 November 2013
Figure 4 Secondary electron images showing reaction textures from hydrothermal reactions. ( a ) Sharp edges of the reacted grain, showing the preservation of the external dimensions of the primary krennerite grains (sample no. A7). ( b ) Rough surface of the 24 h reacted grain (A11), showing
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Aligned exsolution (?) lamellae of sylvanite (Syl) within a grain of krenne...
Published: 01 February 2012
Fig. 7 Aligned exsolution (?) lamellae of sylvanite (Syl) within a grain of krennerite (Knn). Note the association with arsenian tetrahedrite (aTd) and petzite (Ptz). Crossed polars, 100× magnification.
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Maps of the Golden Mile deposit illustrating the location of: (A) calaverit...
Published: 01 December 2003
F ig . 10. Maps of the Golden Mile deposit illustrating the location of: (A) calaverite, montbrayite and krennerite, (B) petzite and sylvanite, (C) hessite and stützite, (D) altaite, coloradoite and tellurantimony. Data are from Golding (1978) and this study.
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Photomicrographs of representative sulfide and telluride mineralization at ...
Published: 01 September 2018
(BSE). (C) Hessite and petzite intergrown with anilite in stage III clear quartz veins (BSE). (D) Intergrowth of altaite, petzite, hessite, and chalcopyrite in a stage III vein and native gold of stage IV filling a fracture in the stage III mineralization (reflected light). (E) Sylvanite-krennerite