Names | |
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Other names
barium diborate, barium boron oxide, barium metaborate
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Identifiers | |
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3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.033.824 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
BaB2O4 or Ba(BO2)2 | |
Molar mass | 222.95 |
Appearance | white powder or colorless crystals |
Odor | odorless |
Density | 3.85 g/cm3[1] |
Melting point | 1,095 °C (2,003 °F; 1,368 K)[2] |
Solubility in hydrochloric acid | soluble |
Refractive index (nD)
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ne = 1.5534, no = 1.6776 |
Structure | |
Rhombohedral, hR126[3] | |
R3c, No. 161 | |
a = 1.2529 nm, c = 1.274 nm
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Hazards | |
GHS labelling: | |
Warning | |
H302 | |
P264, P270, P301+P312, P330, P501 | |
Flash point | Non-flammable |
Safety data sheet (SDS) | MSDS |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Barium borate is an inorganic compound, a borate of barium with a chemical formula BaB2O4 or Ba(BO2)2. It is available as a hydrate or dehydrated form, as white powder or colorless crystals. The crystals exist in the high-temperature α phase and low-temperature β phase, abbreviated as BBO; both phases are birefringent, and BBO is a common nonlinear optical material.
Barium borate was discovered and developed by Chen Chuangtian and others of the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences.