TY - JOUR
T1 - Characterization of Beryllium-Boron-Bearing Materials by Parallel Electron Energy-Loss Spectroscopy (PEELS)
AU - Garvie, Laurence
AU - Buseck, P R
AU - Rez, Peter
N1 - Funding Information:
We thank David Wright of the Materials Facility, Center for Solid State Science at Arizona State University for help with the Be boride syntheses and Dr. Wörle for the LiBC. This work was supported by grants from the National Science Foundation NSF EAR-9418206 (to PRB and LAJG) and DMR 903-6253 (to PR). The PEELS used for this research was performed at the Center for High Resolution Electron Microscopy at Arizona State University, established with support from the National Science Foundation (DMR-89-13384).
PY - 1997/11/1
Y1 - 1997/11/1
N2 - The stoichiometry of a set of commercial and laboratory-synthesized Be-B-bearing materials was determined by parallel electron energy-loss spectroscopy (PEELS). The Be and B K edges are well separated in energy, allowing easy determination of the elemental ratios. PEELS analyses of materials with reported compositions of "Be2B" and "Be2B3" provided stoichiometries near Be2.8B and Be4B5, respectively. We confirmed an earlier report of Be0.6(±0.1)B5.9(±0.7)C, a material with theα-rhombohedral B structure. We also synthesized and characterized Be0.5(±0.1)B4.9(±0.3)N, a new ternary material with theα-rhombohedral B structure with refined hexagonal cell parameters ofah=5.487(5) Å andch=12.486(14) Å. By comparison of the features at the core-loss edges of Be0.5(±0.1)B4.9(±0.3)N, we conclude that most N forms N2pairs between the icosahedra and Be substitutes for B within the icosahedra.
AB - The stoichiometry of a set of commercial and laboratory-synthesized Be-B-bearing materials was determined by parallel electron energy-loss spectroscopy (PEELS). The Be and B K edges are well separated in energy, allowing easy determination of the elemental ratios. PEELS analyses of materials with reported compositions of "Be2B" and "Be2B3" provided stoichiometries near Be2.8B and Be4B5, respectively. We confirmed an earlier report of Be0.6(±0.1)B5.9(±0.7)C, a material with theα-rhombohedral B structure. We also synthesized and characterized Be0.5(±0.1)B4.9(±0.3)N, a new ternary material with theα-rhombohedral B structure with refined hexagonal cell parameters ofah=5.487(5) Å andch=12.486(14) Å. By comparison of the features at the core-loss edges of Be0.5(±0.1)B4.9(±0.3)N, we conclude that most N forms N2pairs between the icosahedra and Be substitutes for B within the icosahedra.
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U2 - 10.1006/jssc.1997.7581
DO - 10.1006/jssc.1997.7581
M3 - Article
AN - SCOPUS:0011385742
SN - 0022-4596
VL - 133
SP - 347
EP - 355
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 2
ER -