Trisodium pentaborate
| Identifiers | |
|---|---|
| Properties | |
| B5H2Na3O10 | |
| Molar mass | 285.03 g·mol−1 |
| Appearance | Transparent crystal |
| Soluble | |
| Structure | |
| Orthorhombic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Trisodium pentaborate is a salt that can form as a monohydrate with formula Na3B5O8(OH)2·H2O, which contains the anion dihydroxydopentaborate [B5O8(OH)2]3−.[1]
Its formula may be incorrectly given as Na3B5O8·2H2O, or as 3Na2O5B2O3·4H2O. It may also be called simply sodium pentaborate,[1] but this name is more properly reserved for the compound with elemental formula Na2O·5B2O3·nH2O.
Structure[edit]
Trisodium pentaborate monohydrate crystallizes as thin plates in the orthorhombic crystal system, with symmetry group Pbca and cell parameters a = 880.4 pm, b = 1837.1 pm, c = 1092.4 pm, formulas per cell Z = 8.[1]
References[edit]
- ^ a b c Silvio Menchetti and Cesare Sabelli (1977): "The crystal structure of synthetic sodium pentaborate monohydrate". Acta Crystallographica Section B, volume B33, pages 3730-3733. doi:10.1107/S0567740877011959
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