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ianthinite

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Journal Article
Published: 01 December 1954
American Mineralogist (1954) 39 (11-12): 1018–1020.
...Judith W. Frondel; Frank Cuttitta Abstract A specimen from Katanga labeled ianthinite and consisting of purple-colored minute needles and laths was sent by J. F. Vaes to the Harvard University mineral collection several years ago. The mineral resembles ianthinite in the hand specimen, but chemical...
Journal Article
Published: 01 August 1965
American Mineralogist (1965) 50 (7-8): 909–923.
... the deposit indicate that uranium has migrated less than 100 feet downslope from the ore body. Radioactive minerals include pitchblende, schoepite, ianthinite, epi-ianthinite, bec-querelite, soddyite, boltwoodite, uranophane, zeunerite, metazeunerite, and a hydrated autunite. Other minerals are tetrahedrite...
Journal Article
Published: 01 June 1947
American Mineralogist (1947) 32 (5-6): 344–350.
... mentioned mineral because it differs very little, both crystallographically and chemically, from schoepite. In naming the second mineral epiianthinite we specially wished to emphasize the fact that it not only crystallizes on ianthinite, but also that its lattice is in continuity with that of ianthinite...
Image
REE patterns of vyacheslavite, (Ca,REE)-rich vyacheslavite, and associated ...
Published: 03 January 2022
, var. pitchblende; uraninite III, late uraninite replacing ianthinite. (Color online.)
Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (5): 959–967.
..., with both UO 6 and UO 7 bipyramids, which is similar to the sheets found in spriggite, ianthinite and wyartite. The sheets alternate with the interlayer, which contains K + , Ca 2+ and H 2 O molecules. Interstitial cations are linked into infinite chains that extend along [10-1]. Adjacent sheets are linked...
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Journal Article
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 530–548.
... such as ianthinite. Also these textures have been observed. We show that the combination of REE geochemistry, careful paragenetic observations and thermodynamic modeling allows to reconstruct the formation and weathering of uranium deposits in great detail. * E-mail: markl@uni-tuebingen.de Manuscript...
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Journal Article
Published: 01 February 2004
American Mineralogist (2004) 89 (2-3): 339–347.
... 2+ cations and H 2 O groups in the interlayer. Billietite and spriggite contain only hexavalent U in the uranyl sheets, whereas the similar sheets in β-U 3 O 8 contain U 5+ and U 6+ , and those in ianthinite U 4+ and U 6+ . Spriggite has the highest Pb: U ratio among the known hydrated Pb uranyl...
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Journal Article
Published: 01 February 1960
American Mineralogist (1960) 45 (1-2): 200–208.
... repeated precession x -ray examination of a single crystal: wyartite I (comparable to “ianthinite” described by Bignand, 1955), a =11.25 ± 0.03, b = 7.09 s ± 0.03, c = 20.80 ± 0.06 Å, space group P2 1 2 1 2 1 - D 4 2 (no. 19), pseudo space-groups P2 1 cn - C 9 2v (no. 33) or Pmcn - D 16 2h (no. 62...
Image
Uranyl oxyhydroxide minerals commonly form an alteration rind on the uranin...
Published: 01 October 2009
F igure 6. Uranyl oxyhydroxide minerals commonly form an alteration rind on the uraninite. Here, yellow schoepite [(UO 2 ) 8 O 2 (OH) 12 ·12H 2 O] forms pseudomorphs after acicular ianthinite [U 2 4+ (U 6+ O 2 ) 4 O 6 ·9H 2 O] crystals (from Shinkolobwe, Congo). Photo courtesy of Robert Lauf
Journal Article
Published: 01 September 2017
American Mineralogist (2017) 102 (9): 1771–1775.
... of H 2 O in the structures, therefore higher CDA corresponds to older products during the weathering sequence. There are two or three other UOH minerals that contain reduced forms of U. They are ianthinite (with U 4+ ), wyartite, and dehydrated wyartite (with U 5+ in addition to U 6+ ). The presence...
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Image
Examples of uranium minerals: ( a ) primary magmatic uraninite I (M34/1); M...
Published: 01 April 2013
on a granite fissure; Wittichen ( f ) pseudomorphs of goethite after autunite group mineral; Menzenschwand ( g ) pseudomorphs of uraninite III after ianthinite; Menzenschwand, this is a frequently observed texture described by Ramdohr (1963) ( h ) secondary uraninite III replacing pyrite (M29/5
Journal Article
Published: 01 March 2018
European Journal of Mineralogy (2018) 30 (2): 237–251.
... Gauthierite KPb[(UO 2 ) 7 O 5 (OH) 7 ](H 2 O) 8 P 2 1 / c 5772 520 7.02 3651.63 100.57 Spriggite Pb 3 [(UO 2 ) 6 O 8 (OH) 2 ](H 2 O) 3 C 2/ c 4613 172 5.47 941.32 66.12 Vandenbrandeite Cu[(UO 2 )(OH) 4 ] P 1 ‾ 255 24 3.56 86.04 19.51 Ianthinite [ U 2 4...
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Journal Article
Published: 29 September 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (5): 999–1020.
... mineral, ianthinite, may contain U 5+ , resulting from the oxidation of U 4+ in its structure ( Table 1 ). Shinkolobweite occurs on a specimen of massive uraninite from the Shinkolobwe mine, Democratic Republic of Congo, housed at the Canadian Museum of Nature in Ottawa, Canada. The specimen was part...
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Journal Article
Published: 01 December 2006
The Canadian Mineralogist (2006) 44 (6): 1379–1385.
...+ O 2 ) 2   2+ (CO 3 ) O 4 (OH) (H 2 O) 7 ( Burns & Finch 1999 ), as shown by Clark (1960) . For many years, wyartite was confused with ianthinite ( Bignand 1955 ), and it was described as a separate mineral species by Guillemin & Protas (1959) . A single-crystal X-ray study of type...
FIGURES
Journal Article
Published: 03 January 2022
American Mineralogist (2022) 107 (1): 131–137.
..., var. pitchblende; uraninite III, late uraninite replacing ianthinite. (Color online.) ...
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Journal Article
Published: 01 June 2003
The Canadian Mineralogist (2003) 41 (3): 677–685.
... ), wölsendorfite ( Burns 1999a ), vanden-driesscheite ( Burns 1997 ), agrinierite ( Cahill & Burns 1999 ), richetite ( Burns 1998b ), ianthinite ( Burns et al. 1997b ), and sayrite ( Piret et al. 1983 ) have all been reported. The crystal structure of the rare U–Bi–O–H species uranosphaerite has remained...
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Journal Article
Published: 01 October 2006
The Canadian Mineralogist (2006) 44 (5): 1197–1205.
... symmetrically and stereochemically distinct sheets of uranyl polyhedra in the crystal structure of billietite ( Fig. 1 ). The first sheet ( Fig. 1a ) consists of three uranyl polyhedra, U (1), U (2) and U (3), that share edges and corners to form a sheet identical to that in ianthinite ( Burns et al. 1997c...
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Journal Article
Published: 01 December 2004
The Canadian Mineralogist (2004) 42 (6): 1683–1697.
...+ , such as ianthinite, [U 4+   2 (U 6+ O 2 ) 4 O 6 (OH) 4 (H 2 O) 4 ](H 2 O) 5 , wyartite, Ca[U 5+ (U 6+ O 2 ) 2 (CO 3 )O 4 (OH)](H 2 O) 7 , and wyartite-II (unpublished) can only be stable at low redox potential, where U 4+ and U 5+ ions are stable in aqueous solution [ Eh must be below 0.20 eV for U 5...
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Journal Article
Published: 01 February 2000
The Canadian Mineralogist (2000) 38 (1): 163–173.
... by the chain-stacking sequence U m DU m D … ( Fig. 5e ). The β–U 3 O 8 sheet anion-topology ( Fig. 5f ) is the basis of the sheets in ianthinite ( Burns et al. 1997a ), as well as the sheets in β–U 3 O 8 . This topology can conveniently be described using a chain-stacking sequence involving...
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Journal Article
Published: 01 February 2013
Mineralogical Magazine (2013) 77 (1): 137–152.
... is characteristic of supergene phases ( Langmuir, 1978 ; Finch and Murakami, 1999 ). To date, there have been few reports of supergene minerals sensu stricto , with U 4+ in their crystal structures. The few that have been described include the mixed-state mineral ianthinite, U 4+ (UO 2 ) 4 O 6 (OH) 4 (H 2 O) 4...
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