Boron arsenide

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Crystal structure
Crystal structure of B12As2
__ B 3+      __ As 3−
Crystal system

cubic

Lattice parameters

0.4777 nm

General
Surname Boron arsenide
other names
  • Dodecabordiarsenide
  • Boron arsenide (ambiguous)
Ratio formula B 12 As 2
External identifiers / databases
CAS number 12005-70-8
Wikidata Q15718766
properties
Molar mass 279.58 g mol −1
safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Boron arsenide is a chemical compound of boron from the group of arsenides . The ambiguous name boron arsenide is often used in the literature .

Extraction and presentation

Boron arsenide can be obtained by pyrolytic decomposition of diborane and arsine above 920 ° C.

properties

Boron subarsenide consists of boron icosahedra with interposed As 2 groups, has a band gap of 3.47  eV and is grown from a substrate on silicon carbide .

At room temperature , borosubarsenide has a very high thermal conductivity λ of over 2 kW / (m · K), which roughly corresponds to the thermal conductivity of diamond .

Individual evidence

  1. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  2. ↑ JL Boone, TP Vandoren: Boron arsenide thin film solar cell development . In: NASA STI / Recon Technical Report N . tape 81 , September 1980, p. 14445 , bibcode : 1980STIN ... 8114445B .
  3. ^ Semiconductor Research . University of Bristol, Applied Spectroscopy Group. Archived from the original on February 1, 2014. Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved September 20, 2013. @1@ 2Template: Webachiv / IABot / spectra.phy.bris.ac.uk
  4. ^ L. Lindsay, DA Broido, TL Reinecke: First-Principles Determination of Ultrahigh Thermal Conductivity of Boron Arsenide: A Competitor for Diamond? In: Physical Review Letters . tape 111 , no. 2 , 2013, p. 025901 , doi : 10.1103 / PhysRevLett.111.025901 .