Non-ideality and defectivity of the åkermanite-gehlenite solid solution: An X-ray diffraction and TEM study

American Mineralogist

Volumn 92, Issue 10, 2007, Pages 1685-1694

  Gemmi, Mauro ^a   Merlini, Marco ^a   Cruciani, Giuseppe ^b   Artioli, Gilberto ^a  

^a UNIVERSITY OF MILAN   (Italy)

^b UNIVERSITY OF FERRARA   (Italy)

Author keywords

Electron microscopy; Melilite; Solid solution; X ray diffraction

Indexed keywords

ALUMINUM METALLOGRAPHY; CRYSTAL ATOMIC STRUCTURE; DEFECTS; ELECTRON MICROSCOPES; ELECTRON MICROSCOPY; SILICON WAFERS; SINGLE CRYSTALS; VOLUMETRIC ANALYSIS; X RAY DIFFRACTION;

ANOMALOUS BEHAVIOR; COMPOSITIONAL RANGE; DIFFUSE SCATTERING; ELECTRON MICROSCOPY IMAGES; INCOMMENSURATE MODULATION; MELILITE; NON-STOICHIOMETRIC; STRUCTURE ANALYSIS;

SOLID SOLUTIONS;

ALUMINUM; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; MELILITE; SILICON; SOLID SOLUTION; TRANSMISSION ELECTRON MICROSCOPY; TWINNING; X-RAY DIFFRACTION;

EID: 35448974553     PISSN: 0003004X     EISSN: None     Source Type: Journal    
DOI: 10.2138/am.2007.2380     Document Type: Article

References (36)

1. 2. American Mineralogist, 75, 847-858.
2. Bindi, L., Bonazzi, P., and Fitton, J.G. (2001) Crystal chemistry of strontian melilite from nephelinite lava of Mt. Etinde, Cameroon. European Journal of Mineralogy, 13, 121-125.
3. Bindi, L., Rees, R.H., and Bonazzi, P. (2003) Twinning in natural melilite simulating a fivefold superstructure. Acta Crystallographica, B59, 156-158.
4. Blessing, R.H. (1995) An empirical correction for absorption anisotropy. Acta Crystallographica, A51, 33-38.
5. 7 (åkermanite) melilites. Geochimica and Cosmochimica Acta, 45, 1609-1617.
6. Dapiaggi, M., Gemmi, M., Proverbio, M., and Artioli, G. (2002) Evidence of a superstructure in selected members of synthetic åkermanite gebelenite solid solution. Proceedings of XXXII Congress of Associazione Italiana di Cristallografia. 24th-27th September 2002, Bressanone, Italy.
7. Deer, W.A., Howie, R.A., and Zussman, J. (1992) An introduction to the Rock-Forming Minerals, 2nd ed. Longman, London.
8. 7: structural evidence for the B/Si ordered distribution. American Mineralogist, 85, 1512-1515.
9. Hammersley, A.P., Svensson, S.O., Hanfland, M., Fitch, A.N., and Häusermann, D. (1996) Two-dimensional detector software: From real detector to idealized image or two-theta scan. High Pressure Research, 14, 235-248.
10. Hemingway, B.S., Evans, H.T. Jr., Nord, G.L. Jr., Haselton, H.T. Jr., Robie, R.A., McGee, J.J. (1986) Akermanite: phase transitions in heat capacity and thermal expansion, and revised thermodynamic data. Canadian Mineralogist, 24, 425-434.
11. 7. Neues Jahrbuch fr Mineralogie (Abhandlungen), H1, 1-10.
12. 7. Neues Jahrbuch fr Mineralogie (Abhandlungen), 143, 210-222.
13. 7 in incommensurate and normal phases and observation of diffuse streaks at high temperature. Physics and Chemistry of Minerals, 28, 150-166.
14. Larson, A.C. and Von Dreele, R.B. (1988) Laur. 86-748, Los Alamos National Laboratory, Los Alamos, New Mexico.
15. Loewenstein, W. (1954) The distribution of aluminum in the tetrahedra of silicates and aluminates. American Mineralogist, 39, 92-96
16. 7. Zeitschrift für Kristallographie, 130, 427-437.
17. 7. Zeitschrift für Kristallographie, 131, 314-321.
18. 7. Canadian Mineralogist, 10, 822-837.
19. Merlini, M., Gemmi, M., and Artioli, A. (2005) Thermal expansion and phase transitions in åkermanite and gehlenite. Physics and Chemistry of Minerals, 32, 189-196.
20. Nespolo, M. and Ferraris, G. (2004) Applied geminography-symmetry analysis of twinned crystals and definition of twinning by reticular polyholohedry. Acta Crystallographica, A60, 89-95.
21. Osborn, E.F. and Shairer, J.F. (1941) The ternary system pseudowollastonite-åkermanite-gehlenite. American Journal of Science 239, 715-763.
22. Oxford (2003) Xcalibur CCD System, CrysAlis Software System, Version 1.171, Oxford Diffraction Ltd.
23. 7. Crystallography Reports, 40, 593-597.
24. 7, a new beryllium mineral and its relation to the melilite group. Scientia Sinica, 11, 977-988.
25. Petricek, V. and Dusek, M. (2000) JANA2000. Institute of Physics, Praha, Czech Republic.
26. Röthlisberger, F., Seifert, F., and Czank, M. (1990) Chemical control of the commensurate-incommensurate phase transition in synthetic melilites. European Journal of Mineralogy, 2, 585-594.
27. Seifert, F., Czank, M., Simons, B., and Schmahl, W. (1987) A commensurate-incommensurate phase transition in iron bearing åkermanites. Physics and Chemistry of Minerals, 14, 26-35.
28. Smith, J.V. (1953) Reexamination if the crystal structure of melilite. American Mineralogist, 38, 643-661.
29. Swainson, I.P., Dove, M.T., Schmahl, W., and Putnis, A. (1992) Neutron powder diffraction study of the åkermanite-gehlenite solid solution series. Physics and Chemistry of Minerals, 19, 185-195.
30. 1.9. Zeitschrift für Kristallographie, 215, 346-351.
31. Taylor, H.F.W. (1997) Cement chemistry. Thomas Telford Publishing, London.
32. 3 Acta Crystallographica, B34, 1422-1428.
33. 7 melilite crystalline solutions. Fortschritte der Mineralogie, 52, 119-131.
34. 7. Zeitschrift für Kristallographie, 74, 131-138.
35. Wood, J.A. (1988) Chondritic Meteorites and the Solar Nebula. Annual Review of Earth and Planetary Sciences, 16, 53-72.
36. Yoder, H.S. (1973) Melilite stability and paragenesis. Fortschritte der Mineralogie, 50, 140-173.