Abstract
We discuss the principal axes systems of monoclinic and triclinic crystals regarding their elastic properties. Explicit formulas are presented for the orientation of these coordinate systems for monoclinic crystals. In this context, theoretical results from literature on the elastic properties of monoclinic (space group C2/m) gallia and alumina are critically discussed.
Highlights
Explicit formulas are presented for the orientation of these coordinate systems for monoclinic crystals
For β-Ga2O3 two sets of elastic constants have been determined e xperimentally[18,23]. We find it helpful to derive here analytical formulas for the orientation of the principal axes system of elastic deformation (PA-D) and PA-R coordinate systems
The spherical angles θ and φ define the rotational transformation of vectors r in the crystal system into vectors r′ in another Cartesian coordinate system
Summary
OPEN The principal axes systems for the elastic properties of monoclinic gallia Marius Grundmann We discuss the principal axes systems of monoclinic and triclinic crystals regarding their elastic properties. Explicit formulas are presented for the orientation of these coordinate systems for monoclinic crystals.
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