z-logo
open-access-imgOpen Access
THE CRYSTAL STRUCTURE OF MnGa AND THE DEGREE OF ORDER
Author(s) -
Lu Xue-Shan,
Jingkui Liang,
Yang Zhong-Ruo
Publication year - 1979
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.28.54
Subject(s) - tetragonal crystal system , gallium , crystallography , crystal structure , materials science , atom (system on chip) , solid solution , manganese , degree (music) , phase (matter) , stoichiometry , lattice (music) , chemistry , physics , organic chemistry , computer science , acoustics , embedded system , metallurgy
The crystal structure of the γ3 phase in the Mn-Ga system has been determined by the Debye-Scherrer method, and thence the degree of order in the atomic arrangement in this phase region has been estimated as a function of the gallium content.The structure of the γ3 phase belongs to the tetragonal system, the space group being D4h1-P4/mmm. The ideal stoichiometric composition is MnGa, and each unit cell contains one formula weight, the manganese and gallium atom occupying (000) and 1/2 1/2 1/2) positions respectively. It is a distorted form of the B structure, and if it is rotated π/4 about the c-axis, the transformed unit cell can be shown to be of the type LI0, isomorphous with CuAu-I. At room temperature, the lattice spaeings of the original cell at 42.9 at.% Ga are α=2.7475? and c=3.6756?.This phase may be considered as a substitutional solid solution of γ-Mn, stabilized at room temperature due to the partial substitution of manganese atoms by gallium atoms as a tetragonal face-centred ordered structure. In this entire phase region, the degree of order increases with the gallium content.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here