 | | Journal (article/letter/editorial) | | pp. 241-247, 1979. CATION ORDERING PATTERN IN AMESITE STEPHEN H. HALL 1 AND STURGES W. BAILEY Department...Wisconsin 53706 Abstract-Cation ordering in amesite-2H 2 from Antarctica has reduced the true symmetry from the...Africa. Key Words-Amesite, Antarctica, Cation Ordering, Twinning. INTRODUCTION Amesite is a rare trioctahedral...date is that of Steinfink and Brunton (1956) on amesite from the Saranovskoye chromite deposits, USSR,...(1976) described amesite crystals from the Dufek Massif in the Pensacola Mountains, Antarctica, that also exhibit |  | | Journal (article/letter/editorial) | | Volume 61, pages 497499, 1976 Amesitefrom Antarctica SrspunN H. Hnr-r ANDS. W. B,q.tI-rv Department...Abstract Amesitecrystalsfrom the Dufek Massif, PensacolaMountains,in Antarctica have been aretwinnedon (001)...angleof 18" and triclinicdiffractionsymmetryP1. Amesite is a relatively rare 7 A-layer silicate that, to...or a 14 A chlorite. Amesite from a previously unreported locality in Antarctica has been made availableto...portion of the Dufek Massif, a stratiform mafic intrusive (Ford and Boyd, 1968). The amesite occurs on the |  | | Book | | I ~- , Mineral Resources Potential of Antarctica SHL WITHDRAWN Physical Sciences ANTARCTIC...Editor . GEOLOGICAL INvESTIGATIONS IN NORTHERN LAND Edmund Stump, Editor GEOLOGY AND PALEONTOLOGY OF...ANTARCTIC GEOLOGY OF THE CENTRAL 'fRANSANTARCTIC MOUNTAINS Mort D. Turner and John F. Splettstoesser, Editors...Editor METEOROLOGICAL 8nmIES AT PLATEAU STATION, ANTARCTICA Joost A. Businger, Editor OCEANOLOGY OF THE...J. Rubin, Editor UPPER ATMOSPHERE RESEARCH IN ANTARCTICA L. J. Lanzerotti and C.G. Park, Editors THE |  | | Report (issue) | | Intrusions in Australasia, and on the Dufek Intrusion, Antarctica By Gerald K. Czamanske^, David I. Groves^...Intrusions in Australasia, and on the Dufek Intrusion, Antarctica Compiled by Gerald K. Czamanske, David...patterns and development of greenstone belts in the eastern Yilgarn Block, Western Australia, in Windley, B...1976, Archaean geology of mineral deposits of the Eastern Goldfields: International Geological Congress,...Geochemistry of Archaean volcanic belts in the Eastern Goldfields region of Western Australia: Journal |  | | Journal (article/letter/editorial) | | 45, No. 3. 30 1- 3 10, 1997. REFINEMENT OF AN AMESITE-2H1 POLYTYPE FROM POSTMASBURG, SOUTH AFRICA HONG...Wisconsin 53706 Abstract-The crystal structure of amesite-2H, from the Postmasburg Mn ores of South Africa...layer 2 instead of the usual 1 site. Key Words-Amesite-2H" Distortions, Ordering Patterns, Postmasburg...South Africa, Twinning. INTRODUCTION Mg,AI-rich amesite, whose ideal composition is (Mg2AI)(SiAl)Os(OH)4'...chromite deposit in the North Urals; the Dufek massif in Antarctica; and the Postmasburg Mn-ores near Gloucester |  | | Journal (issue) | | frequently encountered members of the group. AMESITE Amesite is a Fascinaring rnfr1eral ,.._·hid, may conform...s of amesite from Chester, Massachusetts (USA) are hexago,i.al, while those from the Dufek massif in the...the Pensacola .\.fountains of Al1tarct.ica arc triclinic. Left: White apstite on• b1ts11 (matrix/ofchlorites...species forms mainly in Valais (France). Like amesite, radiating spherical aggl'egates. it appears to...in the Harz chlol'ites inasmuch-as the1r' con• Mountains (Gcm,any) and in form co the wmal monOCJinic the |  | | Journal (article/letter/editorial) | | layers. Specimen is clintonite-lMd from Ural Mountains, U.S.S.R. a/ 3, the twinning can be recognized...ITis cronstedtite from Kizbanya, Romania; 2H, is amesite from Postmasburg, Republic of South Africa; 2H2...Pribram, Czechoslovakia; 6R , is amesite from the Dufek Massif, Antarctica. be examined (e.g., by hhl precession |  | | Report (volume) | | COMPOSITIONS OF OTHER TRIOCTAHEDRAL 169 179 181 AMESITE BERTHIERINE ODINITE 182 184 CRONSTEDTITE NI-RICH... Species Serpentines Chrysotile, lizardite, amesite, berthierine, cronstedtite, etc. Kaolinite, dickite...Trioctahedra lizardite* 1T (+2H, 1T,1M-3T amesite* kellyite* berthierine brindleyite fraipontite...multilayer specimens of aluminian serpentine, amesite, and cronstedtite have structures more complex...leading D group stable most predicted as amesite species temperature high etc., stilpnomelane |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | north to south 14. Oceania 15. Australia 16. Antarctica 17. South America The localities section includes...(Verespatik). In Russia, gold is found on the eastern slope of the Ural Mts. for a distance of 500 miles...VHN = 1380-159. R = 92.3; weakly anisotropic. Eastern Transbaikal, Russia, in albitized granite in association...and Yakutia, Russia; Witwatersrand, South Africa; Massif du Sud, New Caledonia; Heazlewood district, TAS...Germany; Lengen , Chile. sm DI:130, Copiap6 , Alacran land; Jachymov, Czech Republic; Mina CE 20:71(1959) |  | | Book (edition) | | vivianite, Bolivia; ( center, right) topaz, Thomas Mountains, Utah; (lower le ft) rhodochrosite, N'Chwaning...Hittero, Norway; in the Vishnevye and Ilmenskie mountains, Urals, USSR; and at Bayun-Obo, China. SELECTED...near Pizbucendro, Switzerland; in the Ilmenskie Mountains, Urals, USSR; and at localities in Madagascar... Utah; Red Cloud fluorite mine, Gallinas 7 Mountains, New Mexico; Wheal Alfred, Phillaok, Cornwall...small cavities in "gummite" at Margnac, in the Massif Central, France. SELECTED REFERENCE: Cesbron, F |  | | Book (edition) | | cha nges at present occurring in cent ral a n d eastern Europe and elsewhere. German reu nification has...to be chabazitc. Named for Acadia, a tem1 for eastern provinces of Canada. including Nova Scotia. (TL)...group. F. Stromeyer ( 1 8 2 1 ) K. \le/. Akad. /land. Sturkh .. p. 160. Named from CXK�l11 'point'. alluding...thorianite with up to 1 2 wt.% PbO. (TL) Aidan region. eastern Siberi:i. US S R . Named for locality. Aldermanite...1 . b 5.606, c 3 .4 1 5 A rPDF 25-246]. (TL) Elizabeth mine, Oravicza, H ungary. Named from O.AAOs and |
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