Table 1 Comparison between the theoretically predicted and the experimental values of B50C2 lattice parameters and electrical properties. The structure in the first column was proven to be dynamically unstable.

From: First-Principles Predictions and Synthesis of B50C2 by Chemical Vapor Deposition

Lattice Parameters

B50C2 (Theory-present work; structure from ref. 11) Conductor

B50C2 (Theory- present work) Insulator

B50C2 (Experiment – present work) Insulator ρ ~MΩ-cm

B50C1.9 α-tetragonal (ref. 2)

a

8.652 Å

8.724 Å

8.787 Å

8.753 Å

b

8.776 Å

8.784 Å

8.739 Å

8.753 Å

c

5.076 Å

5.013 Å

5.007 Å

5.093 Å

α

90°

89.77°

89.83°

90°

β

90°

89.70°

89.81°

90°

γ

90°

89.68°

89.64°

90°

  1. The second and third columns show good agreement between theory and experiment.