X-ray diffraction studies using diamond coated rhenium gasket to megabar pressures

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X-ray diffraction studies at megabar pressures are limited by the sample thickness between the diamond anvils. High strength gaskets are desirable to improve the quality of x-ray diffraction data. We present a technique which employs a microwave plasma chemical vapor deposited diamond layer on one side of a rhenium gasket. As a test case, we show energy dispersive x-ray diffraction data on rare earth metal neodymium to 153 GPa using a synchrotron source. The increased sample thickness results in an unambiguous crystal structure determination of a monoclinic phase in neodymium above 75 GPa. [chemical vapor deposition, diamond, rhenium gasket, x-ray ... continued below

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185 Kilobytes pages

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Akella, J; Catledge, S A; Chesnut, G N; Prokop, H; Vohra, Y K & Weir, S T September 30, 1999.

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Description

X-ray diffraction studies at megabar pressures are limited by the sample thickness between the diamond anvils. High strength gaskets are desirable to improve the quality of x-ray diffraction data. We present a technique which employs a microwave plasma chemical vapor deposited diamond layer on one side of a rhenium gasket. As a test case, we show energy dispersive x-ray diffraction data on rare earth metal neodymium to 153 GPa using a synchrotron source. The increased sample thickness results in an unambiguous crystal structure determination of a monoclinic phase in neodymium above 75 GPa. [chemical vapor deposition, diamond, rhenium gasket, x-ray diffraction, neodymium]

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185 Kilobytes pages

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  • International Conference on High Pressure Science and Technology, Honolulu, HI (US), 07/25/1999--07/30/1999

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  • Report No.: UCRL-JC-133812
  • Report No.: DP0102012
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 12222
  • Archival Resource Key: ark:/67531/metadc621536

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  • September 30, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:12 p.m.

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Akella, J; Catledge, S A; Chesnut, G N; Prokop, H; Vohra, Y K & Weir, S T. X-ray diffraction studies using diamond coated rhenium gasket to megabar pressures, article, September 30, 1999; California. (digital.library.unt.edu/ark:/67531/metadc621536/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.