 Molar magnetic susceptibility

The product ${\chi }_{\mathrm{mol}}=V_m{\chi }_v$ of volume magnetic susceptibility and molar volume. In SI it has units ${\mathrm{m}}^3\mathrm{mo}{\mathrm{l}}^{-1}$. For one localized magnetic ion per formula unit, its Curie–Weiss law is ${\chi }_{\mathrm{mol}}=C_{\mathrm{mol}}/(T-\Theta )$, with $C_{\mathrm{mol}}={\mu }_0{N}_A{\mu }_{\mathrm{eff}}^2/(3k_B)$. Normalization per mole of formula units and per mole of magnetic ions differ when there is more than one such ion per formula unit.