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Crystal-structurere?nementswereperformedonclintonite-1M crystals[idealcompo-sitionCa (Mg Al) (SiAl )O (OH) ]fromskarnsofthePredazzo-MonzoniareaandAdamelloMassif(northernItaly)withtheaimofcharacterizin...
Theavailability ofa synthetic multilayercrystal and accurately calibrated oxide and silicate standards makeit possible to usethe electron microprobefor precisea analysis ofspinel. Arequirement ofthe a...
Raman spectra oftwo synthetic, noncubic garnet samples rich in MgSi03component weremeasuredin adiamond-anvil cellto 200kbar atroom temperature. Sample1was pure MgSi03majorite;sample 2wasa solid soluti...
40Ar* diffusion in Fe-rich biotite     40Ar* diffusion  Fe-rich biotite       font style='font-size:12px;'> 2012/4/6
Hydrothermal bulk-loss experiments employing radiogenic Ar(4°Ar*) wereperformed to determine whether 40 Ar*diffusivity in biotite increases withFecontent. Diffusion laws determined for intermediate an...
This contribution deals withthe crystal chemistry ofphlogopite and Fe3+-rich phlogo-pite from the Tapira alkaline-carbonatite complex (Brazil) to assess the petrological sig-nificance and genetic cond...
The crystal structure of the most K-rich natural pyroxene ever reported, a chromian diopside with1.5wt%K20,has been refined (diffractometer data, filtered MoKaradiation, by least-squares using XTAL to...
Biotite and amphibole containing up to 4.6 and 5.1 wt%Cl,respectively, are found in gneisses from BlackRock Forest, located within the Hudson Highlands ofNewYork. The area wasmetamorphosed to granulit...
Fluid-absent meltingis believed to bean important processin the generation ofmelts mthe lower crust and upper mantle.Breakdownofphlogopite makesH0 available and thus controlsthe conditions atwhichflui...
The Sinya Beds of the Amboseli Basin in Tanzania and Kenya consist largely of carbonate rocks and Mg-rich clays that are intensely deformed where exposed in and near former meerschaum mines. The carbo...
The composition and origin of vanadium-bearing clay minerals in the Jurassic (Morrison and Entrada Formations) sandstones of the Colorado Plateau are reassessed using microanalyses (microprobe and sca...
Abstract: Boxwork fabric in which numerous thin or thick halloysite wails are interconnected into a microscopically porous cellular pattern is widely developed in the halloysite-rich kaolin formed by ...
Abstract: Although phosphate sorption by goethite and other less-abundant Fe oxides strongly influences the concentration of this anion in the soil solution and aquatic environments, relatively little...
Mordenite occurs in hydrothermally altered rhyolitic volcanic rocks at the margin of a Late Miocene lake basin on the island of Samos, Greece. The mordenite was identified by its X-ray powder diffract...
Hydrotalcite-like compounds, described by the formula [Zn1-xAlx(OH)2][(CO3)x/2 · nH2O], were prepared by coprecipitation methods at 80°C and characterized by bulk chemical analysis, X-ray powder diffr...
Hydrotalcite-like compounds, [Mg1−xAlx(OH)2]x+ [xX− · n H2O], where X− = ½ CO32- or OH−, were prepared by hydrothermal syntheses at PH2O = 100 MPa and T = 100°–350°C. St...

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