Do exsolutions influence the kinetics of the order-disorder reaction in orthopyroxene?

Phase Transitions

Volumn 69, Issue 1, 1999, Pages 35-46

  Zema, Michele ^a   Domeneghetti, M Chiara ^b   Tazzoli, Vittorio ^c  

^a Centro Grandi Strumenti   (Italy)

^b CNR   (Italy)

^c Dipartimento di Scienze della Terra   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

ANNEALING; CRYSTAL STRUCTURE; ION EXCHANGE; IRON; MAGNESIUM; NUMERICAL METHODS; ORDER DISORDER TRANSITIONS; RATE CONSTANTS; REACTION KINETICS; SINGLE CRYSTALS; SOLUTIONS; X RAY DIFFRACTION ANALYSIS;

EXSOLUTIONS; EXSOLVED AUGITE; JOHNSTOWN DIOGENITE; MUELLER EQUATION; ORTHOPYROXENE; X RAY SINGLE CRYSTAL DIFFRACTION;

AROMATIC COMPOUNDS;

EID: 0343962272     PISSN: 01411594     EISSN: None     Source Type: Journal    
DOI: 10.1080/01411599908208006     Document Type: Article

References (22)

1. Anovitz, L.M., E.J. Essene and W.R. Dunham (1988) order-disorder experiments on orthopyroxenes: implications for the orthopyroxene geospeedometer. American Mineralogist, 73, 1060-1073.
2. Besancon, J.R. (1981) Rate of cation disordering in orthopyroxenes. American Mineralogist, 66, 965-973.
3. Blessing, R.H., P. Coppens and P. Becker (1974) Computer analysis of step-scanned X-ray data. Journal of Applied Crystallography, 7, 488-492.
4. Cannillo, E., G. Germani and F. Mazzi (1983) New crystallographic software for Philips PW 1100 single crystal diffractometer. CNR Centro di Studio per la Cristallografia, Internal Report 2.
5. Domeneghetti, M.C., G.M. Molin, M. Stimpfl and M. Tribaudino (1995) Orthopyroxene from the Serra de Magé meteorite: structure refinement and estimation of C2/c pyroxene contributions to apparent Pbca diffraction violations. American Mineralogist, 80, 923-929.
6. Domeneghetti, M.C., V. Tazzoli, T. Boffa Ballaran and G.M. Molin (1996) Orthopyroxene from the Serra de Magé meteorite: a structure refinement procedure for a Pbca phase coexisting with a C2/c exsolved phase. American Mineralogist, 81, 842-846.
7. Ganguly, J. (1982) Mg-Fe order-disorder in ferromagnesian silicates II. In S.K. Saxena (Ed.) Thermodynamics: Kinetics and Geological Applications (Advances Physical Geochemistry 2), Springer, Berlin, pp. 58-99.
8. 2+-Mg interdiffusion in orthopyroxene: Retrieval from data on intracrystalline exchange reaction. American Mineralogist, 79, 930-937.
9. Ganguly, J., H. Yang and S. Ghose (1994) Thermal history of mesosiderites: quantitative constraints from compositional zoning and Fe-Mg ordering in orthopyroxenes. Geochimica et Cosmochimica Acta, 58, 2711-2723.
10. James, F. and M. Ross (1975) MINUIT, a system for function minimisation and analysis of the parameter errors and correlations. CERN/DD, Int. Rep. 75/20 Comput. Phys., 10, 343-347.
11. Lehmann, M.S. and F.K. Larsen (1974) A method for location of the peaks in step-scan measured Bragg reflections. Acta Crystallographica, A 30, 580-584.
12. Molin, G.M., M.C. Domeneghetti, G. Salviulo, M. Stimpfl and M. Tribaudino (1994) Antarctic FRO90011 lodranite: cooling history from pyroxene crystal chemistry and microstructure. Earth and Planetary Science Letters, 128, 479-487.
13. Mori, H. and H. Takeda (1981) Thermal and deformational histories of diogenites as inferred from their microtextures of orthopyroxene. Earth and Planetary Science Letters, 53, 266-274.
14. Mueller, R.F. (1969) Kinetics and thermodynamics of intracrystalline distribution. Mineralogical Society American Special Paper, 2, 83-93.
15. North, A.C.T., D.C. Phillips and F.S. Mathews (1968) A semi-empirical method of absorption correction. Acta Crystallographica, A 24, 351-359.
16. 2+-Mg distribution in aluminous orthopyroxenes. Phys. Chem. Minerals, 15, 140-147.
17. 2+-Mg order-disorder in orthopyroxene. Some kinetic results. Phys. Chem. Minerals, 16, 421-427.
18. Sheldrick, G.M. (1993) SHELXL-93, A program for crystal structure refinement, University of Goettingen, Germany.
19. Skogby, H. (1992) Order-disorder kinetics in orthopyroxenes of ophiolite origin. Contrib. Mineral. Petrol., 109, 471-478.
20. Sykes-Nord, J.A. and G.M. Molin (1993) Mg-Fe order-disorder reaction in Fe-rich orthopyroxene: structural variation and kinetics. American Mineralogist, 78, 921-931.
21. 2+-Mg ordering in orthopyroxene. Earth and Planetary Science Letters, 144, 359-367.
22. 2+-Mg ordering in orthopyroxene by single-crystal X-ray diffraction. Meteoritics & Planetary Science, 32, 855-862.