1. The thermodynamics of substances at very high pressures and temperatures and some mineral reactions in the earth's mantle

   • I. A. Ostrovsky

   OriginalPaper Pages: 105 - 118

2. Contrasting properties and behaviour of antiphase domains in pyroxenes

   • Michael A. Carpenter

   OriginalPaper Pages: 119 - 131

3. Fission track annealing characteristics and dating of vermiculite

   • O. P. Sharma
   • K. D. Bal
   • K. K. Nagpaul

   OriginalPaper Pages: 133 - 139

4. Deformation twinning in calcite, dolomite, and other rhombohedral carbonates

   • D. J. Barber
   • H. -R. Wenk

   OriginalPaper Pages: 141 - 165

5. Phase transformations in ABO ₄ type compounds under high pressure

   • Osamu Fukunaga
   • Shinobu Yamaoka

   OriginalPaper Pages: 167 - 177

6. Crystal structure refinement and electron density distribution in diaspore

   • Roderick J. Hill

   OriginalPaper Pages: 179 - 200

7. Meeting announcement: Clay mineral conference

   Announcement Pages: i - i

8. Erratum

   Erratum Pages: ii - ii