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Kombat Mine

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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 619-628.
...Nikita V. Chukanov; Oleg I. Siidra; Yury S. Polekhovsky; Igor V. Pekov; Dmitry A. Varlamov; Vera N. Ermolaeva; Alla A. Virus The new lead oxychloride vanadate mineral erikjonssonite was discovered at the abandoned Kombat copper mine, Grootfontein district, Namibia, in association with hausmannite...
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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 637-646.
...: nikchukanov@yandex.ru 17 11 2018 25 12 2018 05 04 2019 © 2019 E. Schweizerbart’sche Verlagsbuchhandlung, 70176 Stuttgart, Germany 2019 milanriederite new mineral vesuvianite group crystal structure Mössbauer Kombat mine Namibia The vesuvianite group combines...
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Journal Article
Published: 31 March 2018
The Canadian Mineralogist (2018) 56 (2): 159-165.
...Nikita V. Chukanov; Diana O. Nekrasova; Oleg I. Siidra; Yury S. Polekhovsky; Igor V. Pekov Abstract The new mineral janchevite was discovered in Mn-oxide ore from the Kombat mine, Grootfontein district, Otjozondjupa region, Namibia. Associated minerals are baryte, hausmannite, calcite, magnesite...
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Journal Article
Published: 01 March 2018
European Journal of Mineralogy (2018) 30 (2): 383-391.
... of the Kombat mine. Grootfonteinite is named after the locality in the Grootfontein district. The mineral forms platy grains up to 1 mm across and up to 0.2 mm thick included in and intergrown with massive cerussite. Grootfonteinite is colourless, with white streak and adamantine lustre. It is brittle...
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Journal Article
Published: 01 November 2016
American Mineralogist (2016) 101 (11): 2539-2543.
...Robert T. Downs; William W. Pinch; Richard M. Thompson; Stanley H. Evans; Lauren Megaw Abstract A new chain-silicate mineral species, yangite, ideally PbMnSi 3 O 8 ·H 2 O, has been found on a specimen from the Kombat mine, Otavi Valley, Namibia. Associated minerals are melanotekite...
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Journal Article
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1693-1696.
...Frank C. Hawthorne; Yassir A. Abdu; Neil A. Ball; William W. Pinch Abstract Carlfrancisite, Mn 3 2+ (Mn 2+ ,Mg,Fe 3+ ,Al) 42 (As 3+ O 3 ) 2 (As 5+ O 4 ) 4 [(Si,As 5+ )O 4 ] 6 [(As 5+ ,Si)O 4 ] 2 (OH) 42 , is a new mineral from the Kombat mine, Otavi Valley, Namibia, and occurs as curved platy...
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Journal Article
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 883-890.
..., damaraite, kombatite, sahlinite, copper, quartz, barysilite, Mn silicates and a number of Mn oxyhydroxide minerals on a specimen from the Kombat mine in Namibia. The minerals formed as late-stage products of hydrothermal reworking of primary sulfide minerals. Hereroite is monoclinic, C 2/ c with a = 23.14(1...
FIGURES
Journal Article
Published: 01 December 1989
American Mineralogist (1989) 74 (11-12): 1374-1376.
...Pete J. Dunn; Carl A. Francis; Robert A. Ramik; Joseph A. Nelen; John Innes Abstract Wiserite, a very rare manganese borate, has been found at the Kombat mine, Namibia, associated with hausmannite, alleghanyite, and pyrobelonite on the hanging-wall side of a 2-m-thick lens of manganeseo xide ore...
Journal Article
Published: 01 October 1989
American Mineralogist (1989) 74 (9-10): 1203-1206.
... . Optical properties include uniaxial (+); ω = 1.596(2), ε = 1.604(2). Jaffeite occurs at the Kombat mine, Namibia, in a low-grade metamorphic setting, with major defemite and hausmannite, and minor brucite, hillebrandite, vesuvianite, glaucochroite, apatite, galena, and native copper. Copyright © 1989...
Journal Article
Published: 01 October 1988
American Mineralogist (1988) 73 (9-10): 1182-1185.
...Pete J. Dunn; Carl A. Francis; John Innes Abstract A mcgovernite-like mineral from the Kombat mine, Namibia, occurs with alleghanyite, calcite, and ribbeite. It has the approximate formula (Mn,Mg,Fe 3+ ) 273 As ˜12 3+ As ˜30 5+ Si ˜42 O 324 -(OH) 252 . It is hexagonal, R 3 2/ c or R 3 c...
Journal Article
Published: 01 August 1988
American Mineralogist (1988) 73 (7-8): 888-893.
...Donald R. Peacor; Halil Sarp; Pete J. Dunn; John Innes; Joseph A. Nelen Abstract Discovery of well-crystallized defemite occurring in platy crystals up to 1 cm in diameter in the Kombat mine, Namibia, has led to improved physical and chemical data and refinement of the composition. Crystal...
Journal Article
Published: 01 June 1988
American Mineralogist (1988) 73 (5-6): 632-636.
...Donald R. Peacor; Eric J. Essene; Roland C. Rouse; Pete J. Dunn; Joseph A. Nelen; Joel D. Grice; John Innes; Oleg Von Knorring Abstract Holdawayite is a new mineral occurring at the Kombat mine, Namibia. The chemical analysis is MgO 4.4, MnO 64.6, CaO 0.5, FeO 0.2, B 2 O 3 1.2, CO 2 14.2, H 2 O...
Journal Article
Published: 01 June 1988
American Mineralogist (1988) 73 (5-6): 643-650.
...Roland C. Rouse; Donald R. Peacor; Pete J. Dunn; Alan J. Criddle; Chris J. Stanley; John Innes Abstract Asisite, ideally Pb 7 SiO 8 Cl 2 , is a new species from the Kombat mine in South West Africa (Namibia). Its unit cell is tetragonal, I 4/ mmm , with a = 3.897(2), c = 22.81(2) Å, and Z = 1...
Journal Article
Published: 01 February 1987
American Mineralogist (1987) 72 (1-2): 213-216.
...Donald R. Peacor; Pete J. Dunn; Shu-Chun Su; John L. Innes Abstract Ribbeite, Mn 5 (OH) 2 (SiO 4 ) 2 , is a new mineral from the Kombat mine in Namibia. It is orthorhombic with space group Pbnm or Pbn 2 1 and with lattice parameters a = 4.799(1), b = 10.742(6), c = 15.70(1) Å, Z = 4. Chemical...
Journal Article
Published: 01 November 2018
American Mineralogist (2018) 103 (11): 1749-1760.
... as a sakhaite-like mineral from the Kombat Mine, Tsumeb. The Si:B ratios of the samples ranged from that of end-member sakhaite (containing B only) to that of end-member harkerite (Si:B = 1:1), with several intermediate compositions. All samples were deficient in B relative to the ideal composition, implying...
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Journal Article
Published: 01 October 2018
Mineralogical Magazine (2018) 82 (5): 1101-1118.
... , from the Kombat mine, Otavi Valley, Namibia, and mcgovernite, ideally Zn 3 (Mn 2+ ,Mg,Fe 3+ ,Al) 42 (As 3+ O 3 ) 2 (As 5+ O 4 ) 4 [(Si,As 5+ )O 4 ] 8 (OH) 42 , hexagonal (rhombohedral), R 3̄ m with Z = 6, and unit-cell parameters: a = 8.2061(3), c = 204.118(8) Å and V = 11903.8(6) Å 3 , from Sterling...
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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 248-255.
...Oleg I. Siidra; Sergey V. Krivovichev; Rick W. Turner; Mike S. Rumsey; John Spratt Abstract The crystal structure of hereroite, a new complex lead oxychloride mineral from the Kombat Mine, Grootfontein, Namibia, has been solved by direct methods and refined to R 1 = 0.054 for 6931 unique observed...
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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 256-261.
...Oleg I. Siidra; Sergey V. Krivovichev; Rick W. Turner; Mike S. Rumsey; John Spratt Abstract The crystal structure of vladkrivovichevite, a new complex lead oxychloride mineral from the Kombat Mine, Grootfontein, Namibia, has been solved by direct methods and refined to R 1 = 0.048 for 3801 unique...
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Journal Article
Published: 01 November 2001
American Mineralogist (2001) 86 (11-12): 1494-1505.
...+\mathit{x}}.\] \end{document} The unit cell of turtmannite is similar to those of mcgovernite, a Mn-Mg-Zn arsenate from Sterling Hill, New Jersey, and an unnamed “mcgovernite-like” Mn-Mg arsenate from the Kombat Mine, Namibia. The crystal structure of turtmannite is close to the model predicted...
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Journal Article
Published: 01 June 1996
American Mineralogist (1996) 81 (5-6): 625-631.
... H atoms of OH groups bonded to Ca. The framework carries a positive charge, which is balanced by small anions (mainly Cl) in the structural channels. The crystal structure of defernite from the Kombat mine, Namibia, was refined using 3845 reflections to R = 2.6% at 100 K. The low but ubiquitous SiO...