Abstract
The origin of the crystal field and its variation with temperature in severalα-alums have been studied bynmr of27Al andepr of Cr3+ at high hydrostatic pressures and low temperatures. The results lead to an explanation of the anomalous temperature variation of the axial crystal field at the trivalent ion site. The mechanism of the phase transition in ammonium alum is also explained. A correlation between the axial crystal field as determined bynmr (e 2 qQ/h) and that determined byepr (D) has been obtained.
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Abdeen A N, Will G, Schafer W, Krfel A, Bargouth M O, Recker K and Weiss A 1981Z. Krist. 157 147
Bacon G E and Gardner W E 1958Proc. R. Soc. (London) A246 78
Becquerel J and Opechowski W 1932Physica 6 1039
Blum H 1967Phys. Rev. 161 213
Bridgman P W 1952The physics of high pressures Chap. 2 (London: G Bell and Sons)
Burns G 1960J. Chem. Phys. 32 1585
Burns G 1961Phys. Rev. 123 1634
Chicault R and Buisson 1977J. Phys. 38 795
Cromer D T, Kay M I and Larson A C 1966Acta Crystallogr. 21 383
Cromer D T, Kay M I and Larson A C 1967Acta Crystallogr. 22 182
Cromer D T and Kay M I 1967Acta Crystallogr. 22 800
Danilov A G and Manoogian A 1972aPhys. Rev. B6 4097
Danilov A G and Manoogian A 1972bPhys. Rev. B6 4103
Danilov A G, Vial J C and Manoogian A 1973Phys. Rev. B8 3124
Eysel H H and Schumacher G 1977Chem. Phys. Lett. 47 168
Haussuhl S 1961Z. Krist. 116 371
Kay M I and Cromer D T 1970Acta Crystallogr. B26 1349
Klein H, Scherz U, Schulz M, Sefyomo H and Weznewski K 1977Z. Phys. B28 149
Klug H P and Alexander L 1942J. Am. Chem. Soc. 64 1819
Kruczynski Z and Pietrzak J 1982Phys. Status Solidi A71 Kz31
Landolt Bornstein Table Vol III/1 1966
Ledsham A H C and Steeple H 1968aActa Crystallogr. B24 320
Ledsham A H C and Steeple H 1968bActa Crystallogr. B24 1287
Ledsham A H C and Steeple H 1969Acta Crystallogr. B25 398
Ledsham A H C, Steeple H and Hyhes W 1970Acta Crystallogr. B26 1240
Lipson H and Beeuers C A 1935Proc. R. Soc. (London) A148 677
Lipson H 1935aNature (London) 135 912
Lipson H 1935bProc. R. Soc. (London) A151 347
Larson A C and Cromer D T 1967Acta Crystallogr. 22 793
Manoogian A and Leclere A 1976aJ. Chem. Phys. 63 4450
Manoogian A and Leclere A 1976bJ. Chem. Phys. 64 4604
McGarvey B R 1964aJ. Chem. Phys. 40 809
McGarvey B R 1964bJ. Chem. Phys. 41 3743
O’Reilly D E and Tsang T 1967Phys. Rev. 157 417
Owens F J 1977aPhys. Status Solidi B79 623
Owens F J 1977bChem. Phys. Lett. 46 380
Rimai L, Deutsch T and Silverman B T 1964Phys. Rev. 133 A1123
Segleken W G and Torrey H C 1973Phys. Rev. 38 1255
Sinha S and Srinivasan R 1982Chem. Phys. Lett. 88 115
Sinha S and Srinivasan R 1983Rev. Sci. Instrum. 54 1492
Svare I and Holt R M 1979Solid State Commun. 29 851
Vaidya S N and Kennedy G C 1970J. Phys. Chem. Solids 31 2329
Van Vleck J H 1939J. Chem. Phys. 7 61
Walsh W M Jr 1959Phys. Rev. 114 1485
Weiden N and Weiss A 1974Ber. Bunsenges Phys. Chem. 78 1031
Weiden N and Weiss A 1975Ber. Bunsenges Phys. Chem. 79 557
Weiden N and Weiss A 1979J. Mag. Res. 20 279
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Sinha, S., Srinivasan, R. The crystal fields inα-alums—A high pressure magnetic resonance study. Pramana - J Phys 22, 345–364 (1984). https://doi.org/10.1007/BF02846385
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DOI: https://doi.org/10.1007/BF02846385