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Llallagua

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Journal Article

Ferrivauxite, a new phosphate mineral from Llallagua, Bolivia

G. Raade, J. D. Grice, R. Rowe
Published: 01 April 2016
Mineralogical Magazine (2016) 80 (2): 311–324.
DOI: https://doi.org/10.1180/minmag.2015.079.7.15
...G. Raade; J. D. Grice; R. Rowe Abstract Ferrivauxite, ideally Fe 3+ Al 2 (PO 4 ) 2 (OH) 3 ·5H 2 O, is an oxidized equivalent of vauxite, Fe 2+ Al 2 (PO 4 ) 2 (OH) 2 ·6H 2 O, and forms oxidation pseudomorphs after that mineral. It occurs in association with sigloite and crandallite at the Llallagua...
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Structure Refinement and Vibrational Spectroscopy of Vauxite from the Type Locality, Llallagua (bolivia)

Gennaro Ventruti, Emanuela Schingaro, Alessandro Monno, Maria Lacalamita, Giancarlo Della Ventura, Fabio Bellatreccia, Corrado Cuocci, Manuela Rossi, Francesco Capitelli
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 163–176.
DOI: https://doi.org/10.3749/canmin.1500060
...Gennaro Ventruti; Emanuela Schingaro; Alessandro Monno; Maria Lacalamita; Giancarlo Della Ventura; Fabio Bellatreccia; Corrado Cuocci; Manuela Rossi; Francesco Capitelli Abstract A crystal-chemical investigation of vauxite, ideally FeAl 2 (PO 4 ) 2 (OH) 2 ·6H 2 O, from Llallagua (Bolivia) has been...
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Evidence of heterovalent europium in zoned Llallagua apatite using wavelength dispersive XANES

John Rakovan, Matthew Newville, Steve Sutton
Published: 01 May 2001
American Mineralogist (2001) 86 (5-6): 697–700.
DOI: https://doi.org/10.2138/am-2001-5-610
...John Rakovan; Matthew Newville; Steve Sutton Abstract Eu L 3 X-ray absorption near edge structure (XANES) spectroscopy was conducted with a wavelength dispersive (WDS) spectrometer to determine the valence state of europium in a natural, Mn-and REE-rich apatite from Llallagua, Bolivia. Europium...
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Sigloite, a new mineral from Llallagua, Bolivia

Cornelius S. Hurlbut, Jr., Russell Honea
Published: 01 February 1962
American Mineralogist (1962) 47 (1-2): 1–8.
...Cornelius S. Hurlbut, Jr.; Russell Honea Abstract Sigloite, (Fe 3+ , Fe 2+ )A1 2 (P0 4 ) 2 (0,0H)-8H 2 O, is a new mineral formed as an oxidation pseudomorph after paravauxite at Llallagua, Bolivia. Triclinic; a =5.26, b =10.52, c =7.06 Å, α=106°58’, β= 111°30’, ϒ=69°30’; a:b:c =0.4990:l:0.6711...
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Manganoan ferroan wurtzite from Llallagua, Bolivia (I)

F. G. Smith, S. K. DasGupta, V. G. Hill
Published: 01 December 1957
The Canadian Mineralogist (1957) 6 (1): 128–135.
...F. G. Smith; S. K. DasGupta; V. G. Hill "'Wurtzite' from Llallagua, Bolivia, is a mixture of polytypes but a 2H structure is present which is shown by syntheses and x-ray diffraction to have the composition (Zn (sub 0.43) Mn (sub 0.31) Fe (sub 0.26) )S within about 5 percent uncertainty...
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Manganoan ferroan wurtzite from Llallagua, Bolivia (II)

M. J. Mloszewski, A. K. Saha, E. W. Nuffield
Published: 01 December 1957
The Canadian Mineralogist (1957) 6 (1): 136–139.
...M. J. Mloszewski; A. K. Saha; E. W. Nuffield The x-ray powder data for wurtzite from Llallagua, Bolivia, reported by Smith and others are here supplemented by single crystal data. Both the cell dimensions obtained, a = 3.881 and c = 6.315 A, which are larger than for ordinary wurtzite...
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The tin deposits of Llallagua, Bolivia; discussion

Friedrich Ahlfeld
Journal: Economic Geology
Published: 01 March 1936
Economic Geology (1936) 31 (2): 219–221.
DOI: https://doi.org/10.2113/gsecongeo.31.2.219
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The tin deposits of Llallagua, Bolivia; Part II

F. S. Turneaure
Journal: Economic Geology
Published: 01 March 1935
Economic Geology (1935) 30 (2): 170–190.
DOI: https://doi.org/10.2113/gsecongeo.30.2.170
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The tin deposits of Llallagua, Bolivia

Frederick S. Turneaure
Journal: Economic Geology
Published: 01 January 1935
Economic Geology (1935) 30 (1): 14–60.
DOI: https://doi.org/10.2113/gsecongeo.30.1.14
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The Llallagua-Uncia tin deposit [Bolivia]

Victor Samoyloff
Journal: Economic Geology
Published: 01 August 1934
Economic Geology (1934) 29 (5): 481–499.
DOI: https://doi.org/10.2113/gsecongeo.29.5.481
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The tin ores of Uncia-Llallagua, Bolivia

Friedrich Ahlfeld
Journal: Economic Geology
Published: 01 May 1931
Economic Geology (1931) 26 (3): 241–257.
DOI: https://doi.org/10.2113/gsecongeo.26.3.241
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Ungemachite and Clino-Ungemachite: New Minerals from Chile

M. A. Peacock, M. C. Bandy
Published: 01 May 1938
American Mineralogist (1938) 23 (5): 314–328.
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SEM-BSE images of unreacted grains used in experiments. ( a ) Synthetic flu...

SEM-BSE images of unreacted grains used in experiments. ( a ) Synthetic flu...

Published: 01 December 2016
Figure 1 SEM-BSE images of unreacted grains used in experiments. ( a ) Synthetic fluorapatite (FAp). ( b ) Llallagua fluorapatite with weakly visible zoning pattern. ( c ) Llallagua monazite (Mnz). ( d ) Synthetic monazite.
Journal Article

Porphyry tin deposits in Bolivia

R. H. Sillitoe, C. Halls, J. N. Grant
Journal: Economic Geology
Published: 01 August 1975
Economic Geology (1975) 70 (5): 913–927.
DOI: https://doi.org/10.2113/gsecongeo.70.5.913
..., including those at the major Llallagua, Potosi, Oruro, and Chorolque mineralized centers, geological characteristics of which are summarized, contain stockwork, disseminated, and breccia-filling cassiterite mineralization. The deposits are designated as porphyry tin deposits, a name considered to possess...
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Solubility of <span class="search-highlight">Llallagua</span> monazite in 2 N NaOH solution represented as wt% mo...

Solubility of Llallagua monazite in 2 N NaOH solution represented as wt% mo...

Published: 01 March 2018
Figure 2. Solubility of Llallagua monazite in 2 N NaOH solution represented as wt% monazite dissolved in the fluid (wt. loss of crystal/wt. of fluid ×100). Solubilites increase at oxygen fugacities above the FMQ buffer. The x-axis represents the difference in log units from the FMQ equilibrium
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CRYSTAL DATA AND STRUCTURE REFINEMENT FOR VAUXITE FROM <span class="search-highlight">LLALLAGUA</span>, BOLIVIA

CRYSTAL DATA AND STRUCTURE REFINEMENT FOR VAUXITE FROM LLALLAGUA, BOLIVIA

Published: 01 January 2016
TABLE 1. CRYSTAL DATA AND STRUCTURE REFINEMENT FOR VAUXITE FROM LLALLAGUA, BOLIVIA
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BOND LENGTHS (Å) AND SELECTED ANGLES (°) FOR VAUXITE FROM <span class="search-highlight">LLALLAGUA</span>, BOLIVI...

BOND LENGTHS (Å) AND SELECTED ANGLES (°) FOR VAUXITE FROM LLALLAGUA, BOLIVI...

Published: 01 January 2016
TABLE 3. BOND LENGTHS (Å) AND SELECTED ANGLES (°) FOR VAUXITE FROM LLALLAGUA, BOLIVIA
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HYDROGEN BONDS (Å,°) FOR VAUXITE FROM <span class="search-highlight">LLALLAGUA</span>, BOLIVIA

HYDROGEN BONDS (Å,°) FOR VAUXITE FROM LLALLAGUA, BOLIVIA

Published: 01 January 2016
TABLE 4. HYDROGEN BONDS (Å,°) FOR VAUXITE FROM LLALLAGUA, BOLIVIA
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Powder FTIR (a) and Raman (b) spectra of the studied vauxite from <span class="search-highlight">Llallagua</span>...

Powder FTIR (a) and Raman (b) spectra of the studied vauxite from Llallagua...

Published: 01 January 2016
Fig. 6. Powder FTIR (a) and Raman (b) spectra of the studied vauxite from Llallagua in the (3800–2400 cm −1 ) H 2 O stretching region; inset: Raman broad absorption, with maxima at 3405 and 3160 cm −1 .
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Single-crystal FTIR spectrum of the studied vauxite from <span class="search-highlight">Llallagua</span> in the N...

Single-crystal FTIR spectrum of the studied vauxite from Llallagua in the N...

Published: 01 January 2016
Fig. 7. Single-crystal FTIR spectrum of the studied vauxite from Llallagua in the NIR (6000–4000 cm −1 ) region.