Research Article
Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite
Table 1
Chemical analytical results of pinnoite (MgB2O4·3H2O) and inderite (Mg2B6O11·15H2O)a.
| Component content | Purity | (MgO) | (B2O3) | (H2O) | n (MgO: B2O3: H2O) |
| Pinnoite (MgB2O4·3H2O) | Theoretical | 1.0000 | 0.2459 | 0.4247 | 0.3274 | 1.00: 1.00: 3.00 | Experimental | 0.9920 | 0.2447 | 0.4243 | 0.3300 | 1.00: 1.00: 3.01 |
| Inderite (Mg2B6O11·15H2O) | Theoretical | 1.0000 | 0.1440 | 0.3732 | 0.4828 | 2.00:3.00:15.00 | Experimental | 0.9990 | 0.1439 | 0.3734 | 0.4827 | 2.00:3.00:15.02 |
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aStandard uncertainties u are u(MgO) = 0.0051, u(B2O3) = 0.0005, and u(H2O) = 0.0079 in mass fraction.
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