A New Intermetallic Tetrahedrally Close-Packed Structure with Juxtaposed Pentagonal Antiprisms Determined by High-Resolution Electron Microscopy
نویسندگان
چکیده
A new intermetallic tetrahedrally close-packed phase, called the C phase, was found coexisting with the C14 Laves phase by means of high-resolution electron microscopy and selected-area electron diffraction. Its space group and lattice parameters are: B2/m, a = 17.8, b =7.7 , c =4 .7 ~ , ~/= 99° and Z =50 (e.s.d.'s of lattice parameters ca 0.05 A). Its atomic coordinates and orientation relationships with the C14 Laves phase have also been determined.
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