1. A mapping of the electron localization function for the silica polymorphs: evidence for domains of electron pairs and sites of potential electrophilic attack

   • G. V. Gibbs
   • D. F. Cox
   • M. Lim

   ORIGINAL PAPER Pages: 307 - 318

2. Influence of cation distribution on the optical absorption spectra of Fe³⁺-bearing spinel s.s.–hercynite crystals: evidence for electron transitions in ^VIFe²⁺–^VIFe³⁺ clusters

   • U. Hålenius
   • H. Skogby
   • G. B. Andreozzi

   ORIGINAL PAPER Pages: 319 - 330

3. Non-convergent ordering and displacive phase transition in pigeonite: in situ HT XRD study

   • F. Cámara
   • M. A. Carpenter
   • V. Tazzoli

   ORIGINAL PAPER Pages: 331 - 340

4. Computer simulation of defect structure in sillimanite and mullites

   • L. Wondraczek
   • G. Heide
   • R. A. Jackson

   ORIGINAL PAPER Pages: 341 - 345

5. Low-temperature studies on the two-dimensional modulations in åkermanite-type crystals: Ca₂MgSi₂O₇ and Ca₂ZnSi₂O₇

   • B. Bagautdinov
   • K. Hagiya
   • K. Iishi

   ORIGINAL PAPER Pages: 346 - 350

6. Dehydration dynamics of Ba-phillipsite: an in situ synchrotron powder diffraction study

   • A. Sani
   • G. Cruciani
   • A. F.

   ORIGINAL PAPER Pages: 351 - 361

7. Single-crystal electronic absorption spectroscopy of synthetic chromium-, cobalt-, and vanadium-bearing pyropes at different temperatures and pressures

   • M. N. Taran
   • K. Langer
   • C. A. Geiger

   ORIGINAL PAPER Pages: 362 - 368

8. A comparison of procrystal and ab initio model representations of the electron-density distributions of minerals

   • R. T. Downs
   • G. V. Gibbs
   • K. M. Rosso

   ORIGINAL PAPER Pages: 369 - 385