1. Referee acknowledgement

   Acknowledgments Pages: 487 - 487

2. Polarized electronic absorption spectra of Co²⁺ ions in the kieserite-type compounds CoSO₄ · H₂O and CoSeO₄ · H₂O

   • M. Wildner

   Original Paper Pages: 489 - 496

3. Lattice dynamics of pyrite FeS₂ — polarizable-ion model

   • H. D. Lutz
   • J. Zwinscher

   Original Paper Pages: 497 - 502

4. Cation distributions in olivines and orthopyroxenes an interlaboratory study

   • A. Kirfel

   Original Paper Pages: 503 - 519

5. Elasticity of superhydrous B

   • Rosemary E. Gerald Pacalo
   • Donald J. Weidner

   Original Paper Pages: 520 - 525

6. Dynamics of Na in sodium aluminosilicate glasses and liquids

   • A. M. George
   • J. F. Stebbins

   Original Paper Pages: 526 - 534

7. Structural properties of reduced Upton montmorillonite

   • W. P. Gates
   • J. W. Stucki
   • R. J. Kirkpatrick

   Original Paper Pages: 535 - 541