Abstract
A tetrahedral MgYNi4 phase is prepared by melting method, and then formation mechanism associated with three-dimensional (3D) morphology is proposed. The tetrahedral MgYNi4 crystal is enclosed by four closed-packed {111} planes, arising from the 4-fold rotoinversion symmetry of MgYNi4 structure. The secondary arms grow along <110> directions between four primary trunks. The {111} lamellas grow from secondary arms to face center and shape up a tetrahedral skeleton with hollows. As {111} lamellas grow, the skeleton can be filled up and the perfect tetrahedral MgYNi4 is formed.
Original language | English |
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Pages (from-to) | 193-196 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 145 |
DOIs | |
State | Published - 15 Apr 2015 |
Keywords
- Crystal growth
- Electron probe microanalysis (EPMA)
- Hydrogen storage
- Solidification
- Tetrahedron