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Atomic Density versus Average Coordination Number in Ge–In–Se Glasses
Author(s) -
Saffarini G.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199906)213:2<261::aid-pssb261>3.0.co;2-#
Subject(s) - coordination number , maxima , maxima and minima , atomic number , crystallography , line (geometry) , germanium , materials science , chemistry , physics , atomic physics , mathematics , geometry , silicon , ion , metallurgy , art , mathematical analysis , organic chemistry , performance art , art history
The variation of the atomic density ϱ with the average coordination number Z for glasses belonging to the Ge x In 6 Se 94— x and Ge x In 12 Se 88— x families of the Ge–In–Se system is investigated. The ϱ — Z dependence displays broad maxima at Z values of 2.42 and 2.58 for families with 6 and 12 at% In, respectively. These maxima are ascribed to changes from a floppy to a rigid type network and from a two‐dimensional layered structure to a three‐dimensional network, respectively. The minima exhibited in the ϱ — Z dependence at Z = 2.63 for the In 6 family and at Z = 2.71 for the In 12 family, corresponding to the tie‐line compositions, are attributed to chemical ordering effects.