8.038.023.0753.0708.013.065a [Å]8.00c [Å]3.0607.993.0557.983.050(a)7.970 1 2 3 4 5P [GPa](b)3.0450 1 2 3 4 5P [GPa]0.3855c/a0.38400.38250.3810Rysunek V.4.3.3. <strong>Zale</strong>żność parametrusieci a (a) i c (b) oraz stosunek c/a (c) dlaβ-Ge 3 N 4 od ciśnienia.Symbole: wartości w zakresie ciśnieńod 0.1 MPa do 5 GPa (■), „guide toeye” (▬).(c)0.37950 1 2 3 4 5P [GPa]345172342171V [Å 3 ]339336333V [Å 3 ]170169168(a)0 1 2 3 4 5 6P [GPa](b)1670 1 2 3 4 5P [GPa]Rysunek V.4.3.4. Zmiana objętości komórki elementarnej α-Ge 3 N 4 (a) i β-Ge 3 N 4 (b) z ciśnieniem.Symbole: wartości w zakresie ciśnień od 0.1 MPa do 5GPa (●), krzywe dopasowane za pomocąrównania stanu Bircha-Murnaghana (▬), punkty eksperymentalne z ref. [37] (■).82
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