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Copper(II) borate

Copper(II) borate is an inorganic compound with the formula Cu3(BO3)2. It consists of copper atoms in their cupric oxidation state and orthoborate groups. In the 19th century it was proposed to be used as a green pigment to replace the very toxic paris green.[3] It has been studied for it photocatalytic properties.[2]

Copper(II) borate
Names
IUPAC name
Copper(II) borate
Other names
Cupric orthoborate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.049.438 Edit this at Wikidata
EC Number
  • 254-401-2
UNII
  • InChI=1S/2BO3.3Cu/c2*2-1(3)4;;;/q2*-3;3*+2
    Key: CQDTUBLRLRFEJX-UHFFFAOYSA-N
  • B([O-])([O-])[O-].B([O-])([O-])[O-].[Cu+2].[Cu+2].[Cu+2]
Properties
B2Cu3O6
Molar mass 308.25 g·mol−1
Appearance Dark green solid[1]
Density 4.54[1]
Insoluble
Structure
Triclinic[2]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312, H315, H320, H332
P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P332+P313
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
0
Related compounds
Other cations
 Sodium orthoborate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Preparation

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Copper(II) borate can be prepared by heating a stoichiometric mixture of copper(II) oxide and diboron trioxide to 900 °C.[2][1]

3CuO + B2O3 → Cu3(BO3)2

References

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  1. ^ a b c Liu, Jikai; Wen, Shuhao; Zou, Xiaoxin; Zuo, Fan; Beran, Gregory J. O.; Feng, Pingyun (2013). "Visible-light-responsive copper(II) borate photocatalysts with intrinsic midgap states for water splitting". J. Mater. Chem. A. 1 (5): 1553–1556. doi:10.1039/C2TA00522K. ISSN 2050-7488.
  2. ^ a b c Fukaya, Atsuko; Watanabe, Isao; Nagamine, Kanetada (October 2001). "Long-Range Order in a Copper Borate Cu3B2O6". Journal of the Physical Society of Japan. 70 (10): 2868–2871. Bibcode:2001JPSJ...70.2868F. doi:10.1143/JPSJ.70.2868. ISSN 0031-9015.
  3. ^ Elsner, L. (1849). Die chemisch - technischen MITTHEILUNGEN der Jahre 1846–1848. Berlin: Julius Springer. p. 82.
 

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