Retention of Xenon in Quartz and Earth's Missing Xenon

See allHide authors and affiliations

Science  18 Nov 2005:
Vol. 310, Issue 5751, pp. 1174-1177
DOI: 10.1126/science.1119070

You are currently viewing the figures only.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

  1. Fig. 1.

    X-ray diffraction spectra. Asterisks denote Pt3Si peaks; Cr, cristobalite; Qz, quartz; Cs, coesite; C, graphite (heater); BN, boron nitride; arb., arbitrary. The dashed curve indicates the Xe liquid signal as observed in a magnesiowüstite + Xe experiment, added for comparison with the diffuse signal observed above 1100 K.

  2. Fig. 2.

    Phase diagram of silica for P and T conditions of in situ x-ray diffraction experiments. Gray lines represent the experimental path for each sample. CX1 and CX4, cristobalite and Xe; SGX1 and SGX2, glass and Xe. The time values indicate how long the samples were above the normal quartz-coesite transition. crist., cristobalite; trid., tridymite.

  3. Fig. 3.

    Scanning electron microprobe image of a 10 GPa and 2273 K run. (A) Pt-Si areas are bright and 1 to 10 μm wide. Xe-filled bubbles are bright, submicrometer to micrometer sized, and located inside coesite crystals. (Inset) Zoom on a Pt-Si–free zone. (B) Energy dispersive x-ray analysis spectra.