 | | Journal (article/letter/editorial) | | associated with sugilite from the Wessels Mine, South Africa: Crystal chemistry and 40Ar-39Ar dating EDWIN...silicate-rich sample from the Wessels mine, Kalahari manganese field, South Africa. The mineral forms centimeter-sized...collision and tectonism affecting the edges of the Kalahari craton, and show that sugilite, and probably also...stratiform manganese deposit of submarine exhalative origin of the Hoskins mine in New South Wales, Australia...occurring in pockets in the Wessels mine, Kalahari Mn field, South Africa (e.g., Cairncross et al. 1997), we |  | B HN, B., OKRUSCH, M., WOERMANN, E., LEHNERT, K., HOERNES, S. (1995) Metamorphic Evolution of Neoproterozoic Manganese Formations and their Country Rocks at Otjosondu, Namibia. Journal of Petrology, 36 (2) 463-496 doi:10.1093/petrology/36.2.463 | Journal (article/letter/editorial) | | eliminate a prominent mass exchange even on a The manganese formations are embedded in iron formations small...during cooling. The uplift path of the In pure manganese ores the critical assemblage brau- sequence can...conditions of 660-700°C at esti- liding with the Kalahari Craton during the Pan-African oromated pressures...partial melts from siliciclastic strata within the manganese KEY WORD& manganiferous sediments; Damara Orogeny;...system minerals to develop. Phase relationships of manganese oxides under consideration. Because of their unusual |  | Czaja, Maria, Lisiecki, Radosław, Chrobak, Artur, Sitko, Rafał, Mazurak, Zbigniew (2018) The absorption- and luminescence spectra of Mn3+ in beryl and vesuvianite. Physics and Chemistry of Minerals, 45 (5) 475-488 doi:10.1007/s00269-017-0934-x | Journal (article/letter/editorial) | | measured at room- and low temperatures. The crystal field stabilization energies are equal to 130.9 kJ/mol...triplets and singlets. In the octahedral crystal field, the 5D term splits into the lower 5 Eg and upper...3 E and the 5T2 levels. With increasing crystal field strength, a shift of absorbance band towards shorter...comprise two bands at 450 and 630 nm. The crystal-field splitting 10Dq for Mn-bearing minerals collected... Lower 10Dq values have been calculated for blanfordite (11,650 cm−1), winchite (11,640 cm−1), juddite |  | | Book (volume) | | States of America by Halsted Press, a Division of John Wiley & Sons, Inc. New York First Edition © W. A...these two series, and nomenclature in the wider field defined by jadeite, aegirine, diopside- hedenbergite...the diopside-hedenbergite-cnstatiteferrosilite field. Single-Chain Silicates: 12 Pyroxenes solution...MgSiO3 Polymorphs The problem of the stability field of clinoenstatite has received much attention but...that high clinoenstatite might have a stability field above that of protoenstatite, but none was discovered |  | | Book (edition) | | for all amateur mineralogists and students in the field. Jacket photo: (Top) sulfur, Sicily, 14cm; (top...(lower /eft) rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine...MEMORY OF 2. HELEN KEMPNER < i FROM ye = JOHN & ELAINE WOODARD oe le sy n-- alor anima ...England Thomas Nelson Australia 102 Dodds Street South Melbourne, Victoria 3205, Australia Nelson Canada...Nancy Smith, preparation and entry data for Groen John and , Chapman Gary Caballero, Craig ous amount of | | | Book (edition) | | for all amateur mineralogists and students in the field. Jacket photo: (Top) sulfur, Sicily, 14 cm; (top... Encyclopedia of Minerals HELEN KEMPNER FRCM JOHN & ElAINE WOODARD . . . N CYCL·OPEDIA OF INERALS...England Thomas Nelson Australia 102 Dodds Street South Melbourne, Victoria 3205, Australia Nelson Canada...Carey Kucera, Gary Caballero, Craig Chapman, and John Groen for data entry and preparation of the final...Herbert Obodda IK Irwin Kennedy JB F. John Barlow JF James Fowler JH John Holfert JL Jack Lowell JP Joe Pfeifer |
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