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

^aStandard uncertainties u are u(MgO) = 0.0051, u(B₂O₃) = 0.0005, and u(H₂O) = 0.0079 in mass fraction.