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Crystallographic orientation of synthetic boules

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Journal Article

Orientation of synthetic corundum for jewel bearings

Horace Winchell
Published: 01 December 1944
American Mineralogist (1944) 29 (11-12): 399–414.
...Horace Winchell Abstract By a method similar to that used in petrofabric analyses, a correlation between crystallographic boule orientation and processing results is shown for synthetic corundum made in America by the well-known Verneuil process. For best processing results, the growth axis...
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Polarizing adapters for the Wolfe goniometer

C. W. Wolfe
Published: 01 February 1959
American Mineralogist (1959) 44 (1-2): 182–184.
...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...
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The nature of Ti-rich inclusions responsible for asterism in Verneuil-grown corundums

Cecilia Viti, Marco Ferrari
Published: 01 November 2006
European Journal of Mineralogy (2006) 18 (6): 823–834.
DOI: https://doi.org/10.1127/0935-1221/2006/0018-0823
... to what observed in synthetic samples (Fig. 3f ). Rarely, acicular inclusions may also occur within the sapphire host; in this case, their aspect ratio is completely similar to that observed in Verneuil samples. S1 is a boule slice, ~ 1.5 cm in diameter, cut perpendicular to 3-fold axis...
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Enhancement of solid-state reaction rates by non-hydrostatic stress effects on polycrystalline diffusion kinetics

Lukas M. Keller, Lutz C. Götze, Erik Rybacki, Georg Dresen, Rainer Abart
Published: 01 October 2010
American Mineralogist (2010) 95 (10): 1399–1407.
DOI: https://doi.org/10.2138/am.2010.3372
... on the kinetics of spinel formation. The crystallographic orientations of MgO and sapphire boules with respect to the reaction interface are given along with the results (Fig. 2 ). Experiments were performed under constant argon flow. Further details concerning temperature, stress, and strain monitoring as well...
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NATROLEMOYNITE, A NEW HYDRATED SODIUM ZIRCONOSILICATE FROM MONT SAINT-HILAIRE, QUEBEC: DESCRIPTION AND STRUCTURE DETERMINATION

Andrew M. McDonald, George Y. Chao
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1295–1306.
DOI: https://doi.org/10.2113/gscanmin.39.5.1295
.... The optical orientation is X = b , Z ∧ a = 41° (measured in the obtuse angleβ). The average result of nineteen electron-microprobe analyses gave Na 2 O 7.47, K 2 O 1.29, CaO 0.37, MnO 0.12, Al 2 O 3 0.04, SiO 2 54.51, TiO 2 0.38, ZrO 2 21.97, Nb 2 O 5 1.01 and H 2 O (calc.) 14.72, total 101.88 wt...
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An experimental study of OH solubility in rutile at 500–900 °C, 0.5–2 GPa, and a range of oxygen fugacities

Clinton V. Colasanti, Elizabeth A. Johnson, Craig E. Manning
Published: 01 August 2011
American Mineralogist (2011) 96 (8-9): 1291–1299.
DOI: https://doi.org/10.2138/am.2011.3708
... to analytically determined OH concentrations, in parts per million H 2 O by weight. The starting material in this study was taken from a pure, synthetic, rutile boule (Morion Co., Brighton, Massachusetts). The rutile was cut into rectangular pieces that were at least 0.75 mm by 0.5 mm and 2 mm long...
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Hydrogen incorporation in olivine from 2–12 GPa

Jed L. Mosenfelder, Natalia I. Deligne, Paul D. Asimow, George R. Rossman
Published: 01 February 2006
American Mineralogist (2006) 91 (2-3): 285–294.
DOI: https://doi.org/10.2138/am.2006.1943
... pure forsterite with minor amounts of excess MgO. For experiment ww331, we used two oriented forsterite crystals cut from a single crystal synthesized by H. Takei using the Czochralski method ( Takei and Kobayashi 1974 ). These crystals are from the same boule used by Zhao et al. (2004...
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Structure, Aggregation and Characterization of Nanoparticles

Glenn A. Waychunas
Published: 01 January 2001
Reviews in Mineralogy and Geochemistry (2001) 44 (1): 105–166.
DOI: https://doi.org/10.2138/rmg.2001.44.04
... in both technological and environmental nanomaterial formation. Finally, rather different aggregation topologies can be produced by crystallographically oriented aggregation processes, such as the incorporation of particular defects, the introduction of polytypes, and the nucleation of metastable phases...
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Analysis of hydrogen in olivine by SIMS: Evaluation of standards and protocol

Jed L. Mosenfelder, Marion Le Voyer, George R. Rossman, Yunbin Guan, David R. Bell, Paul D. Asimow, John M. Eiler
Published: 01 November 2011
American Mineralogist (2011) 96 (11-12): 1725–1741.
DOI: https://doi.org/10.2138/am.2011.3810
... for calculating detection limits. GRR1017 is an end-member forsterite synthesized by Shankland (1967) using the flame fusion method. We obtained polarized IR spectra on an oriented boule with path lengths of 11.96 and 12.16 mm in the [010] and [001] directions, respectively. The sample was almost...
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Abstracts from the 14th International Platinum Symposium and the Wager & Brown Workshop Technical Session

Published: 28 December 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (6): 1175–1576.
DOI: https://doi.org/10.3749/AB00031
... to growth faces, and crystallographic orientations of adjacent minerals that are consistent with epitaxial nucleation [3]. Grain accumulations may exhibit outcrop-scale sedimentary features such as channel erosion and fill, together with preferred shape orientation (foliations and lineations), modal...
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Origin of Au-Rich Carbonate-Hosted Replacement Deposits of the Kassandra Mining District, Northern Greece: Evidence for Late Oligocene, Structurally Controlled, and Zoned Hydrothermal Systems

Chris R. Siron, John F.H. Thompson, Tim Baker, Robert Darling, Gregory Dipple
Journal: Economic Geology
Published: 01 November 2019
Economic Geology (2019) 114 (7): 1389–1414.
DOI: https://doi.org/10.5382/econgeo.4664
... to the southeast, subparallel to the orientation of F2 fold hinges and a locally developed L2 intersection lineation. The locations of the sulfide lenses, however, are largely controlled by strands of the ductile-brittle Kassandra fault and subhorizontal ductile shear zones that occur in the intervening area...
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