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agardite

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REE patterns of <b>agardite</b> overgrown by rhabdophane (a). REE patterns from in...
Published: 01 October 2011
Fig. 12 REE patterns of agardite overgrown by rhabdophane (a). REE patterns from intergrown calcite (SG79Ca) and zálesíite (SG79Ch) and isolated calcite (SG159) normalized to water sampled from Neubulach (b and c).
Journal Article
Published: 01 August 1978
American Mineralogist (1978) 63 (7-8): 704-708.
.... Parnau, a mineral collector of Sunnyvale, California, who was the first to find the mineral. Goudeyite is the Al analog of agardite and is therefore a new member of the mixite group. It occurs as yellow-green hair-like crystals, encrusting fractures and as cross-fiber veinlets. Microprobe analyses...
Journal Article
Published: 01 November 2006
European Journal of Mineralogy (2006) 18 (6): 813-821.
... by very strong hydrogen bonds crossing the (010) plane. Guanacoite has also been found at Taghouni (Tarouni), Bou Azzer district, Morocco, in association with quartz, dolomite, chalcopyrite, chromite, cuprite, malachite and agardite-(Ce). Cation contents (normalized to 5): Cu 2.33, Mg 2.57, Co 0.10; unit...
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Journal Article
Published: 01 August 2005
The Canadian Mineralogist (2005) 43 (4): 1393-1400.
..., allophane, goethite, lepidocrocite, chalcopyrite, pyrite, covellite, chalcocite and quartz. The name calciopetersite denotes that it is the Ca-dominant analogue of petersite-(Y). Calciopetersite is hexagonal, space group P 6 3 /m inferred from the isotypic agardite-(Y) and mixite, a 13.284(4), c 5.902(4) Å...
FIGURES
Journal Article
Published: 01 June 1992
American Mineralogist (1992) 77 (5-6): 656-659.
..., crusts and clusters of yellowish brown rhombohedral crystals up to 5 mm high. The principal forms present are {112} and {001}. Associated species include beudantite, carminite, mimetite, bayldonite, agardite-(Y), goethite, and coronadite. Segnitite is the new As end-member of the lusungite group...
Image
REE patterns of cogenetic chukhrovite and fluorite (a), zálesíite and calci...
Published: 01 October 2011
Fig. 8 REE patterns of cogenetic chukhrovite and fluorite (a), zálesíite and calcite (b) and zálesíite and Mn oxides (c). All REE determined by LA–ICP–MS, except for zálesíite and agardite (EMPA).
Image
Various typical mineral associations of the Clara deposit as discussed in t...
Published: 15 July 2019
with some agardite needles on goethite pseudomorphing chalcopyrite. 3 mm. (c) Azurite crystals overgrowing a clinoclase ball which itself grew on a crust of cornwallite (dark green). 7 mm. (d) Bayldonite crystals on goethite. 1 cm. (e) Anglesite crystal with some anhedral cerussite and blueish covellite
Image
Various typical mineral associations of the Clara deposit as discussed in t...
Published: 15 July 2019
Fig. 6. Various typical mineral associations of the Clara deposit as discussed in the text. (a) Cornwallite “wheels” with agardite needles on goethite replacing chalcopyrite. 4 mm. (b) Reddish and orange-brown bariopharmacosiderite overgrowing and replacing scorodite crystals (hollow). 7 mm. (c
Journal Article
Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1305-1333.
...Fig. 12 REE patterns of agardite overgrown by rhabdophane (a). REE patterns from intergrown calcite (SG79Ca) and zálesíite (SG79Ch) and isolated calcite (SG159) normalized to water sampled from Neubulach (b and c). ...
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Journal Article
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1505-1511.
... crystal size and acicular habit, only mixite ( Mereiter & Preisinger 1986 ), zálesíite ( Aruga & Nakai 1985 ), agardite-(Ce) ( Hess 1983 ), and agardite-(Y) ( Morrison et al . 2013 ) have reported crystal structures. Interestingly, the mixite group has a structural feature in common with zeolites...
FIGURES
Journal Article
Published: 01 April 2005
Mineralogical Magazine (2005) 69 (2): 169-177.
...-product function with the minimum number of component bands used for the fitting process. The Gauss-Lorentz ratio was maintained at values >0.7 and fitting was undertaken until reproducible results were obtained with squared regression coefficient of R 2 >0.995. agardite analytical detection...
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Journal Article
Published: 01 November 2012
American Mineralogist (2012) 97 (11-12): 2064-2072.
..., and A. Katerinopoulos (2011) Agardite-(Nd), NdCu 6 (AsO 4 ) 3 (OH) 6 ·3H 2 O, from the Hilarion Mine, Lavrion, Greece: mineral description and chemical relations with other members of the agardite–zálesíite solid-solution system. Journal of Geosciences, 57, 249–255. Three agardites with different species-defining...
Journal Article
Published: 01 February 2003
American Mineralogist (2003) 88 (2-3): 475-479.
...John L. Jambor; Andrew C. Roberts The general formula of the agardite-type minerals is ACu 6 (AsO 4 ) 3 (OH) 6 •3H 2 O, and for AsO 4 = 3 the above analysis corresponds to (Pb 0.34 Nd 0.20 Y 0.13 La 0.12 Ca 0.10 ) ∑ 0.85 Cu 5.73 (AsO 4 ) 3 (OH) 4.73 •4.8H 2 O, which is the Nd-dominant...
Journal Article
Published: 01 February 2011
Mineralogical Magazine (2011) 75 (1): 27-31.
... Newsletter No. 7, February 2011, page 29 Mineralogical Magazine , 75 , 27–31 Agardite-(Nd) NdCu 6 (AsO 4 ) 3 (OH) 6 ·3H 2 O Hilarion Mine, Agios Konstantinos (Kamariza), Lavrion District, Greece Igor V. Pekov*, Nikita V. Chukanov, Aleksandr E. Zadov, Panagiotis Voudouris, Andreas Magganas...
Journal Article
Published: 15 July 2019
The Canadian Mineralogist (2019) 57 (4): 427-456.
... with some agardite needles on goethite pseudomorphing chalcopyrite. 3 mm. (c) Azurite crystals overgrowing a clinoclase ball which itself grew on a crust of cornwallite (dark green). 7 mm. (d) Bayldonite crystals on goethite. 1 cm. (e) Anglesite crystal with some anhedral cerussite and blueish covellite...
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Journal Article
Published: 01 October 2004
American Mineralogist (2004) 89 (10): 1574-1578.
... 0.15 Nd 0.15 Y 0.09 Sm 0.03 Gd 0.03 Gd Eu 0.02 Dy 0.01 ) ∑1.04 (Cu 5.78 Fe 0.05 ) ∑5.83 (As 2.88 Si 0.17 S 0.05 ) ∑3.10 O 12 (OH) 6 •• 3.6H 2 O for 12 O and 6 (OH), ideally CeCu 6 (AsO 4 ) 3 (OH) 6 •3H 2 O, which is the Ce-dominant analog of agardite-(La) and agardite- (Y). Vitreous to silky...
Journal Article
Published: 01 November 2005
American Mineralogist (2005) 90 (11-12): 1945-1952.
..., and the Natural History Museum, London. R.L. Frost, A.R. McKinnon, P.A. Williams, K.L. Erikson, M.L. Weier, P. Leverett (2005) Studies of natural and synthetic agardites. N. Jahrb. Mineral. Abh., 181, 11–19. Natural agardite-(Ce) and a potentially new species with the formula [(Al,Nd,REE)Cu 6 (AsO 4 ) 3...
FIGURES
Journal Article
Published: 01 February 2002
The Canadian Mineralogist (2002) 40 (1): 257-260.
...), weibyeite [obsol., calcio-ancylite-(Ce)], keilhauite (var., titanite), kanaekanite (obsol., turkestanite–steacyite series), chlorotile (var., agardite), and so forth. Further, some mineral groups have been single-handedly renamed ( e.g. , “hatchettolite group”, p. 167; “semenovite group”, p. 189, etc...
Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 3019-3026.
... a strong NYF (niobium, yttrium, fluorine) geochemical signature, represented by the occurrence of a unique mineralogy that includes: aeschynite-(Y), agardite-(Y), Nb-rich anatase, arsenic-rich fergusonite-beta-(Y), cervandonite-(Ce), chernovite-(Y), crichtonite-senaite, fluorite, gadolinite-(Y), monazite...
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Journal Article
Published: 01 August 2006
Mineralogical Magazine (2006) 70 (4): 397-404.
... it is the last Y mineral to crystallize, after zeolite formation, and perhaps contemporaneously with agardite-(Y). Kamphaugite-(Y) displays very negative δ 13 C V-PDB values (−14.16 and −15.26‰) close to the calcite values (−18.45 to −11.40‰ V-PDB; Fig. 5 ). For this reason, sources for this C such as sea...
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