Interstitial Compounds of Boron

The crystal structure of tridecaboron diphosphide

“…This work confirms the suggestion by Matkovich (1961b) that B13P ~ is an interstitial compound consisting of B12 icosahedra with linear ]3P2 units as the interstitialites.…”

“…A comparison of the X-ray diffraction data in Table 1 and that reported by Matkovich (1961a) shows good agreement for the d values of the stronger lines. The weaker lines reported by Matkovich are not detectable in this work.…”

“…The difference in hkl assignments in the two papers is due to the fact that this work is based on a rhombohedral unit cell while the previous work was based on a related hexagonal cell. Matkovich (1962) has shown that an increase of the a axis to 6.01 /~ and a decrease of the c axis to 11.72 A in the hexagonal dimension of his unit cell lead to better agreement between the two papers as shown in Table 2.…”

Superconducting Gamma/Neutron Spectrometer Task 1 Completion Report Evaluation of Candidate Neutron-Sensitive Materials

“…One particularly intriguing example is B 12 S, a boron-carbide-like material that exhibits high chemical and thermal stability and becomes superconducting below 0.39 K. 22 B 12 S does not appear to be commercially available, but may be prepared through a procedure described by Matkovich. 23 The hexaborides of Y and several of the lanthanides have superconducting transition temperatures and boron contents well within our limits, and some are commercially available; the T c of YB 6 is 7.1 K and, for example, the T c of LaB 6 is 5.7 K. 24 Other higher borides of interest include AlB 12 …”

Heats of Formation of Metallic Borides by Fluorine Bomb Calorimetry

“…2 1 5 (c), a-ALB 1 2 (c) and y-AB1 2 (c) were calculated from the heats of combustion of boron, graphite, B 4 C(c), AB2.21 5 (c), C-ABI 2 (c) and y-AB1I 2 (c) in fluorine at high pressures. The heat measurements were made in a bomb calorimeter.…”