Phasendiagramme von (NH4, M)X und(ND4, M)X mit M = Tl, Rb oder Cs und X=Cl oder Br / Phase Diagrams of (NH4, M)X and (ND4, M)X with M = Tl, Rb or Cs and X = Cl or Br
1979 ◽
Vol 34
(7)
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pp. 862-866
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Keyword(s):
Phase transitions in (NH4, M)Cl with M=Tl, Rb or Cs and (ND4, Tl)Cl as well as (NH4, M)Br and (ND4, M)Br are measured using birefringence or differential thermal analysis. The phase diagrams of the mixed systems with M=Tl having decreasing lattice constant with increasing amount of Tl are similar to the well known T(P) diagrams. Therefore the diagrams of the systems with M=Rb or Cs having increasing lattice constants correspond to T(P) diagrams in the range of fictitious negative pressure P. Substitution of D for H produces an effect similar to reducing the lattice constant. The extraordinary large negative isotope effect of II-III transitions and the appearance of the birefringent phase III in the chlorides are now understood.
1992 ◽
Vol 47
(11)
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pp. 1127-1134
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2019 ◽
Vol 33
(28)
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pp. 1950339
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2011 ◽
Vol 66
(10-11)
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pp. 661-667
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New phase transitions in ceramic SrSnO3: Raman scattering analysis and differential thermal analysis
2008 ◽
Vol 20
(5)
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pp. 055210
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Keyword(s):
1981 ◽
Vol 36
(3)
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pp. 222-225
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1987 ◽
Vol 62
(4)
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pp. 313-317
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2010 ◽
Vol 101
(1)
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pp. 339-347
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1987 ◽
Vol 60
(2)
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pp. 463-466
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2010 ◽
Vol 12
(8)
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pp. 1347-1351
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