STRUCTURE OF YB12 AND SCB12.
Abstract
Preparation of single crystals of YB12 and ScB12 was carried out and the structure of both compounds was examined. ScB12 was found to be tetragonal with a - 5.22A and c - 7.35A, space group I4/mmm. YB12 was found to be cubic in agreement with earlier reports. A detailed x-ray structure analysis was carried out to determine whether the form of the B12 grouping was cubo-octahedral or icosahedral. The cubo-octahedral grouping of the boron atoms is confirmed which is in agreement with that proposed by earlier writers based on steric considerations. The only variable parameter in the structure is found to be x - 0.1679, the B-B distance was determined to be 1.78A and Y-B distance is 2.79A. A new method for isolating metastable single crystals using a plasma is described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0608444
Entities
People
- J. Economy
- R. B. Barrett
- R. F. Giese Jr.
- V. I. Matkovich