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SOLID STATE STUDIES OF THE NOBLE (RARE) GASES AND THEIR SOLID SOLUTIONS
AIR FORCE OFFICE OF SCIENTIFIC RESEARCH ARLINGTON VA
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A spectrogoniometer cryostat has been designed and constructed for studying frozen gases by the x-ray counter diffractometer technique. The instrument is described in detail and its performance is report d. Solid xenon has been studied in the temperature range below 75 K. In particular, lattice parameters and volume expansion coefficients are reported for emperature belo 20 K , IT RTO THE LOWER LI IT OF PUBLISHED CRY LLOGRAPHIC INV IGATIO OF O value of 6.1317 0.0005 Angstroms u i i obtai d for the l ttice p rame r of xenon xtrapolated from 5.5 to 0 K. Incidental observ tio s on krypton, gold, carbo dioxide, and carbon suboxide are reported. A UTHOR
APPROVED FOR PUBLIC RELEASE