Barium borate

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
Names
Other names
barium diborate, barium boron oxide, barium metaborate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.824
EC Number
  • 237-222-4
UNII
  • InChI=1S/2BO2.Ba/c2*2-1-3;/q2*-1;+2 Y
    Key: QBLDFAIABQKINO-UHFFFAOYSA-N Y
  • InChI=1/2BO2.Ba/c2*2-1-3;/q2*-1;+2
    Key: QBLDFAIABQKINO-UHFFFAOYAX
  • [Ba+2].[O-]B=O.[O-]B=O
Properties
BaB2O4 or Ba(BO2)2
Molar mass 222.95
Appearance white powder or colorless crystals
Odor odorless
Density 3.85 g/cm3
Melting point 1,095 °C (2,003 °F; 1,368 K)
Solubility in hydrochloric acid soluble
ne = 1.5534, no = 1.6776
Structure
Rhombohedral, hR126
R3c, No. 161
a = 1.2529 nm, c = 1.274 nm
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).
N verify (what is YN ?)
Infobox references

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.

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