A new boron nitride polymorph,
P2
13 BN (space group:
P2
13), is investigated by first-principles calculations, including its structural properties, stability, elastic properties, anisotropy and electronic properties. It is found that the new boron nitride polymorph
P2
13 BN is mechanically, dynamically and thermodynamically stable. The bulk modulus (
B), shear modulus (
G) and Young's modulus of
P2
13 BN are 91 GPa, 41 GPa and 107 GPa, respectively, all of which are larger than that of Y carbon and TY carbon. By comparing with
c-BN, the Young's modulus, shear modulus and Poisson's ratio of
P2
13 BN show tiny anisotropy in the (001), (010), (100) and (111) planes. At the same time, in contrast with most boron nitride polymorphs,
P2
13 BN is a semiconductor material with a smaller band gap of 1.826 eV. The Debye temperature and the anisotropic sound velocities of
P2
13 BN are also investigated in this work.
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