CRYSTALLOGRAPHY OF SOME HIGH-PRESSURE FORMS OF C6H6 CS2 BR2 CCL4 AND KNO3

From single crystal x-ray diffraction at high pressure and room temperature unit-cell and space-group data were obtained for the following materials: C6H6, I-orthorhombic, a=7.17, 6=9.28, c=6.65, Pbca, CSi-orthorhombic, a=6.16, 6=5.38, c=8.53, Cmca, Bri-orthorhombic, a=8.54, b=6.75, c=8.63, Cmca, CCl4, I-rhombohedral, a=14.27, α=90°, CCl4, II-monoclinic, a=22.10, b=11.05, c=25.0, β=114°, Cc or C2/c, CCl4, III-orthorhombic, a=11.16, 6=14.32, c=5.74, C222, KNO3, m-rhombohedral, a=4.31, a=78°54′, KNO3, IV(?)-orthorhombic, o=5.58, 6=7.52, c=6.58, P2i6 or Pmnb. All unit-cell dimensions are given in angstroms with estimated uncertainties of ±2 in the last decimal place given and uncertainties of ±0.5 deg in angles.