Phasendiagramme von (NH<sub>4</sub>, M)X und(ND<sub>4</sub>, M)X mit M = Tl, Rb oder Cs und X=Cl oder Br / Phase Diagrams of (NH<sub>4</sub>, M)X and (ND<sub>4</sub>, M)X with M = Tl, Rb or Cs and X = Cl or Br
Abstrak
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.
Penulis (1)
Peter Brauer
Akses Cepat
- Tahun Terbit
- 1979
- Bahasa
- en
- Total Sitasi
- 1×
- Sumber Database
- CrossRef
- DOI
- 10.1515/zna-1979-0711
- Akses
- Open Access ✓