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Davey, R. J., Maginn, S. J., ... |
Stabilization of a metastable crystalline phase by twinning in: Nature . - London [u.a.] : Nature Publising Group, ISSN 1476-4687, Vol. 366, No. 6452 (1993), p. 248-250 Zugang: zum Volltext ähnliche Vorschläge |
1993 | |||||||||||||
POLYMORPHISM of crystal structures—alternative crystalstructures resulting from variations in ionic and molecularpacking1 and conformation2—is important ina number of fields in solid-state chemistry, includingbiomineralization3 (in the mineral phases of calciumcarbonate3, for example), polymer science(polypropylene4, for example), explosives (ammonium nitrate,lead azide5), nonlinear optical materials6,ceramics and catalysis (zeolites and metal oxides7). In thepharmaceutical and fine-chemicals industries, polymorphism is central to bothproduction process design and product activity8. Here we showthat crystal twinning can stabilize a crystal polymorph that is otherwise notthe most stable form. We use electron microscopy, X-ray diffraction and Ramanspectroscopy to show that the apparently indefinite persistence of a metastablepolymorph of terephthalic acid can be explained on this basis. If twinning canbe engineered, it may therefore provide a means for stabilizing crystal phaseswith useful physical properties.
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Hornbogen, Erhard |
Structure and thermal stability of vapour-deposited Fe-Cu alloys in: Journal of materials science , ISSN 1573-4803, Vol. 13 (3. 1978), p. 666-670 Zugang: zum Volltext ähnliche Vorschläge |
1978 |
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Mertinat, M.., Herr, U.., ... |
Phase formation and thermal stability of mechanical alloyed iron–tantalum In: Journal of Applied Physics. - [S.l.], ISSN 1089-7550, Vol. 85, No. 7 (1999), p. 3512-3518 Zugang: zum Volltext ähnliche Vorschläge |
1999 |
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Gupta, T. K., Bechtold, J. H., ... |
Stabilization of tetragonal phase in polycrystalline zirconia in: Journal of materials science , ISSN 1573-4803, Vol. 12 (12. 1977), p. 2421-2426 Zugang: zum Volltext ähnliche Vorschläge |
1977 |
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Rybnikář, František. |
Character of crystallization nuclei in isotactic polypropyleneCorrected proofs received March 8, 1982 in: Journal of Applied Polymer Science, in: Journal of Applied Polymer Science . - New York, NY [u.a.] : Wiley, ISSN 0021-8995, ZDB-ID 1491105-x Vol. 27 (5. 1982), p. 1479-1486 Zugang: zum Volltext ähnliche Vorschläge |
1982 |
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Hwang, Cherngye., Geiss, Roy H.., ... |
Imaging of the grain-to-grain epitaxy in NiFe/FeMn thin-film couples In: Journal of Applied Physics. - [S.l.], ISSN 1089-7550, Vol. 64, No. 10 (1988), p. 6115-6117 Zugang: zum Volltext ähnliche Vorschläge |
1988 |