...C. W. Wolfe Abstract The probable usefulness of polarized light, in conjunction with the mechanical framework of a two-circle goniometer has recently occurred to the author when faced with the problem of obtaining the crystallographic orientation of synthetic corundum boules. This note describes...

...C. W. Wolfe; Virginia Franklin Abstract The determination of the refractive indices of liquids, utilizing a hollow prism mounted on a one-circle goniometer, is a well known procedure (Larsen and Berman, 1934). The purpose of this paper is to discuss the extension of the same method to two-circle...

... angle after D. Brewster who first pointed out (1815) that the index of refraction is equal to the tangent of the angle of maximum polarization. Although the subject has been treated in numerous textbooks on optics, e.g. , Born and Wolf (1964), the method has not received much serious attention from...

...C. W. Wolfe Abstract With the rapid growth of crystallography as a science a pronounced need for an adequate two-circle goniometer has been strongly felt in the United States. This need has been met in part by two new commercial sources, the principal difficulty with these sources being their high...

... goniometer equipped with a 1K SMART CCD (charge-coupled device) detector and a crystal-to-detector distance of 5 cm. A discussion of the application of CCD detectors to the analysis of mineral structures was provided by Burns (1998) . A sphere of data was collected using monochromatic Mo K α X-radiation...

... Kriterien schwacher Metamorphose im nordöstlichen Rheinischen Schiefergebirge Neues Jahrb. Geol. Palaontol. Abhandlungen 1972b 141 333 63 Wolf M. Beziehunger zwischen Inkohlung una Geotektonik im nördlichen Rheinischen Schiefergebirge Neues Jahrb. Geol. Palaontol. Abhandlungen 1972 141...

... and crystallo-chemical retardation mechanisms . J. Nucl. Mater . 275 , 81 – 94 . Finch , R.J. & Ewing , R.C. ( 1992 ): The corrosion of uraninite under oxidizing conditions . J. Nucl. Mater . 190 , 133 – 156 . Finn , P.A. , Hoh , J.C. , Wolf , S.F. , Slater , S.A...

... extinction between crossed polarizers. It was mounted on a Bruker Platform 3-circle goniometer equipped with a 1K SMART CCD (charge-coupled device) detector. * E-mail: [email protected] 28 12 1999 23 03 1999 © 2000 American Mineralogist 2000 The structural complexity of uranyl...

... with sharp extinction and uniform optical properties was selected for study. The crystal was mounted on a Bruker P latform three-circle goniometer equipped with a 1K S mart CCD (charge-coupled device) detector and a crystal-to-detector distance of 5 cm. Refinement of the structure was initiated...

... extinction between crossed polarizers and uniform optical properties was mounted on a Bruker PLATFORM three-circle goniometer equipped with an APEX SMART CCD (charge-coupled device) detector with a crystal-to-detector distance of 4.5 cm. A sphere of data to 69° 2θ was collected using monochromatic Mo K α X...

... as observed ( F o ≥ 4σ F ). An acicular crystal with sharp extinction and uniform optical properties was selected for the X-ray study. The crystal was mounted on a Bruker PLATFORM 3-circle goniometer equipped with a 1K SMART CCD (charge-coupled device) detector and a crystal-to-detector distance of 5 cm...

... 2 ) 4 O 3 (OH) 4 ](H 2 O) 2 selected for the structural study is from synthesis experiment 3D–220–2 ( Table 1 ). The acicular yellow crystal shows sharp extinction between crossed polarizers and uniform optical properties. It was mounted on a Bruker PLATFORM three-circle goniometer equipped...

...). Detailed information about the experiment setup has been given elsewhere ( e.g. Wenk et al. 2008 ). The sample was mounted on a goniometer, translated parallel to the goniometer axis over different spots in 2 mm increments to obtain a representative sample volume. The sample slab was then tilted around...

... using a Bruker SMART system consisting of a Platform three-circle goniometer and a 1K CCD-based X-ray area detector. Data were collected using monochromatic Mo- K α X-radiation and frame widths of 0.3° in ω, with 10 s used to acquire each frame. For the crystal recovered from E1, a sphere of three...

... al. , 2004a ). Replacing the inorganic exchangeable cations of smectites with organic cations typically causes an increase in the hydrophobic nature of the clay interlayer environment ( Barrer, 1961 ; Boyd et al. , 1988b ; McBride, 1977 ; Mortland et al. , 1986 ; Wolfe et al. , 1985 ; Xu...

... a 600 μm Ocean Optics optical fiber. Each size fraction of each sample was analyzed at 7 phase angles from 15 to 45° (spectra taken every 5°). Incidence and emergence angles were obtained by using a custom-built goniometer (estimated error of <2°). All spectra were taken in the absence of ambient...

... of weeksite, with individual crystals up to ~0.2 mm long and ~0.05 mm wide. A crystal that exhibits uniform optical properties and sharp extinction between crossed polarizers, with approximate dimensions 0.03 × 0.05 × 0.19 mm, was selected and mounted on a Bruker PLATFORM 3-circle goniometer equipped...

... holders (diameter 27 mm) was used. A Panalytical X’Pert Pro - diffractometer (CuKα radiation generated at 40 kV and 30 mA, Ni filtered) with a 240 mm goniometer radius, equipped with a 0.04 rad primary Søller slit, an automatic divergence slit irradiating a 20 mm sample length, an automatic anti...

... AXS X8APEX system equipped with a four-circle Kappa goniometer and a 4K CCD detector. All data were collected with a combination of φ–ω scans. A crystal-to-detector distance of 40 cm was employed to collect up to 1195 frames, with a scan width of 1° and a counting time 10 to 15 s per frame. Cell...

... collected using a Rigaku-Oxford Diffraction Supernova goniometer equipped with an X-ray micro-source assembled with a high intensity and no noise Pilatus 200 K Dectris detector installed at the Department of Geosciences, University of Padova. The Mo K α micro-X-ray source works at 50 kV and 0.8 mA...