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Braunite-II from N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa

South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
De Villiers, J.E. (1945b). Some minerals occurring in South African manganese deposits. Transactions of the Geological Society of South Africa, 48, 17–25. De Villiers, P.R. and Herbstein, F.H. (1967). Distinction between two members of the braunite group. American Mineralogist, 52, 20–30. De Villiers, P.R. (1970). The geology and mineralogy of the Kalahari manganese-field north of Sishen, Cape Province. Memoir of the Geological Survey of South Africa, No. 59, 84 pages. De Villiers, J.P.R. (1980). The crystal structure of braunite II and its relation to bixbyite and braunite. American Mineralogist, 65, 756–765. De Villiers, J.P.R. (1989). Stacking variations and nonstoichiometry in the bixbyite-braunite polysomatic mineral group. American Mineralogist, 74, 1325–1336. Cairncross, B., Beukes, N. and Gutzmer, J. (1997): The manganese adventure – the South African manganese fields. Associated Ore & Metal Corporation Limited, Johannesburg, Republic of South Africa, 236 pp. Cairncross, B. and Beukes, N.J. (2013). The Kalahari Manganese Field: the adventure continues. Struik Nature, Cape Town, South Africa, 384 pages.
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