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kornite

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Thin section photomicrograph showing norrishite (Nrs) associated with korni...
Published: 01 January 2003
F igure 1. Thin section photomicrograph showing norrishite (Nrs) associated with kornite (Krn), sugilite (Sgl), and Mn-rich pectolite (Pct). Sample N2, base of picture 2.4 mm.
Image
Microscopic thin section ( ca . 0.3 mm in width) showing the typical assemb...
Published: 01 March 2017
Fig. 1 Microscopic thin section ( ca . 0.3 mm in width) showing the typical assemblage of the holotype material of hennomartinite and “kornite” = potassic-mangani-leakeite from the Wessels Mine, Kalahari Manganese Field, South Africa. The bulky light crystals at the rim are sugilite (Online
Journal Article
Published: 01 March 2017
European Journal of Mineralogy (2017) 29 (1): 143–148.
...Fig. 1 Microscopic thin section ( ca . 0.3 mm in width) showing the typical assemblage of the holotype material of hennomartinite and “kornite” = potassic-mangani-leakeite from the Wessels Mine, Kalahari Manganese Field, South Africa. The bulky light crystals at the rim are sugilite (Online...
FIGURES
Journal Article
Published: 01 February 2005
American Mineralogist (2005) 90 (2-3): 304–309.
...Kimberly T. Tait; Frank C. Hawthorne; Joel D. Grice; Luisa Ottolini; V.K. Nayak Abstract Dellaventuraite is a new amphibole species from the Kajlidongri manganese mine, Jhabua District, Madhya Pradesh, India. It occurs with leakeite, kornite, albite, braunite, and bixbyite associated with cross...
FIGURES
Journal Article
Published: 01 March 2003
European Journal of Mineralogy (2003) 15 (2): 309–319.
...: leakeite, kornite, whittakerite and pedrizite) have more than half-occupied A-group sites. Seven new amphibole end-members containing lithium have been discovered in epysienites (dequartzified and albitised granites) from the Pedriza Massif (Central Spain), where lithium incorporation and partitioning...
FIGURES | View All (5)
Journal Article
Published: 01 January 2003
American Mineralogist (2003) 88 (1): 189–194.
...F igure 1. Thin section photomicrograph showing norrishite (Nrs) associated with kornite (Krn), sugilite (Sgl), and Mn-rich pectolite (Pct). Sample N2, base of picture 2.4 mm. ...
FIGURES
Journal Article
Published: 01 October 1997
American Mineralogist (1997) 82 (9-10): 1019–1037.
... therefore been expanded. Alkali amphiboles are now sodic amphiboles. The use of hyphens is defined. New amphibole names approved since 1978 include nyböite, leakeite, kornite, ungarettiite, sadanagaite, and cannilloite. All abandoned names are listed. The formulae and source of the amphibole end-member...
Journal Article
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1329–1344.
..., in a comment on the chemical composition of the then newly discovered kornite, Armbruster et al. (1993) quoted a personal communication from Bernard Leake: “It is not emphasized that K > Na on the A position of kornite, because it would logically loom with an enormous increase in names...
FIGURES
Journal Article
Published: 01 October 2007
Reviews in Mineralogy and Geochemistry (2007) 67 (1): 55–88.
... > 1.00 All groups Mangano 1.00 < Mn 2+ < 4.99 All groups, except for kozulite and ungarettiite Permangano 3.00 < Mn 2+ < 4.99 All groups, except for kozulite Mangani Mn 3+ > 1.00 All groups, except for kornite and ungarettiite Magno B Li ≤ 0.50
 B (Mg+Fe 2+ +Mn+Li...
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Journal Article
Published: 01 June 2010
Mineralogical Magazine (2010) 74 (3): 521–528.
...{empty} \begin{document} \(\mathrm{Fe}_{2}^{3+}\) \end{document} Li)Si 8 O 22 F 2 (4) Kornite NaNa 2 (Mg 2 \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{Mn}_{2}^{3+}\) \end...
Journal Article
Published: 01 May 2004
American Mineralogist (2004) 89 (5-6): 883–887.
... (Mg 3 Al 2 ) Si 8 O 22 (OH) 2 ], being part of the Mg-Fe-Mn-Li group, or they were in the sodic amphibole group, being members of the leakeite [Na Na 2 (LiMg 2 Fe 3+ 2 ) Si 8 O 22 (OH) 2 ] or kornite [(NaK) Na 2 (LiMg 2 Mn 3+ 2 ) Si 8 O 22 (OH) 2 ] species. Other, less Li-rich Li-bearing...
FIGURES
Journal Article
Published: 01 February 2004
Mineralogical Magazine (2004) 68 (1): 209–215.
... 22 (OH) 2 ] or kornite [(NaK)Na 2 (LiMg 2 Mn 2 3+ )Si 8 O 22 (OH) 2 ] species. Other, less Li-rich, Li-bearing amphiboles (Li > 0.25 a.f.p.u. in the standard formula) were denoted by the optional modifier ‘lithian’, preceding a species name which was determined by the rules formulating...
FIGURES
Journal Article
Published: 01 January 2004
European Journal of Mineralogy (2004) 16 (1): 191–196.
... by grouping Mn 2+ + Mn 3+ together for the initial classification, although Mn 3+ contents are still required to distinguish kornite from leakeite. Secondly, the classification parameter (Mg + Fe 2+ + Mn 2+ ) < or > 2.5 apfu is completely discarded as it conflicts with other conditions. The result...
FIGURES
Journal Article
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1355–1362.
... either to the orthorhombic holmquistite or the monoclinic clinoholmquistite series [□Li 2 (Mg 3 Al 2 ) Si 8 O 22 (OH) 2 ], being part of the Mg–Fe–Mn–Li group, or they were in the sodic amphibole group, being attributed to leakeite [Na Na 2 (LiMg 2 Fe 3+   2 ) Si 8 O 22 (OH) 2 ] or kornite [(NaK...
FIGURES
Journal Article
Published: 10 August 2023
Mineralogical Magazine (2023) 87 (6): 935–942.
... (Armbruster et al. , 1993 as “kornite”; renamed by Hawthorne et al. , 2012 ), mangano-mangani-ungarettiite NaNa 2 (Mn 2+ 2 Mn 3+ 3 )Si 8 O 22 O 2 (Hawthorne et al. , 1995 as “ungarettiite”; renamed by Hawthorne et al. , 2012 ), mangani-obertiite NaNa 2 (Mg 3 Mn 3+ Ti 4+ )Si 8 O 22 O 2 (Hawthorne...
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Journal Article
Published: 01 October 2007
Reviews in Mineralogy and Geochemistry (2007) 67 (1): 89–124.
... C 2/ m 1991-028 29     kornite A K B Na 2 C (Mg 2 Mn 3+ 2 Li) T Si 8 O 22 W (OH) 2 C 2/ m 1992-032 30     fluoro-ferroleakeite A Na B Na 2 C (Fe 2+ 2 Fe 3+ 2 Li) T Si 8 O 22 W F 2 C 2/ m 1993-026 31     ungarettiite A Na B Na 2 C (Mn 2+ 2 Mn 3+ 3) T Si...
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Journal Article
Published: 01 August 2001
The Canadian Mineralogist (2001) 39 (4): 1161–1170.
..., and ultimately to correct structural formulae. Three Li-bearing sodic amphiboles have been recognized recently: leakeite, Na Na 2 (Mg 2 Fe 3+ 2 Li) Si 8 O 22 (OH) 2 ( Hawthorne et al. 1992 ), kornite, K Na 2 (Mg 2 Mn 3+ 2 Li) Si 8 O 22 (OH) 2 ( Armbruster et al. 1993 ) and fluoro-ferroleakeite...
FIGURES | View All (7)
Journal Article
Published: 01 August 2011
European Journal of Mineralogy (2011) 23 (4): 661–673.
... at both localities (Fig. 3c, d ). Larger grains are observed to have rhombic cross-sections (Fig. 4 ) and in their optical properties (colour, lustre, pleochroism, habit) resemble an amphibole such as kornite ( Armbruster et al. , 1993a ). However, their chemical composition comprises essentially K, Mn...
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Journal Article
Published: 01 November 2015
The Canadian Mineralogist (2015) 53 (6): 981–990.
... & Beukes 2013 ). The diversity of minerals found in the KMF is also highlighted by Gutzmer & Beukes (1996a) , who list no less than 135 different species, including such rare minerals as banalsite, kentrolite, kornite, sérandite, armbrusterite, norrishite, and sugilite. Further south, in the broad...
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Journal Article
Published: 01 October 2009
Mineralogical Magazine (2009) 73 (5): 817–824.
... (Mg 2 Al 2 Li) T Si 8 O 22 W (OH) 2 , Hawthorne et al ., 1992 ] and kornite [ A K B Na 2 C (Mg 2 \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{Mn}_{2}^{3+}\) \end...