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The critical temperature ($T_{C}$) and the energy gap ($2\Delta(T)$) for thesuperconductor SiH$_4$(H$_2$)$_2$ at 250 GPa have been calculated. The widerange of the Coulomb pseudopotential's values has been considered:$\mu^{\star}\in<0.1,0.3>$. It has been stated that $T_{C}$ decreases togetherwith the increase of $\mu^{\star}$ from 129.83 K to 81.40 K. Thelow-temperature energy gap ($T\sim 0$ K) decreases together with the increaseof the Coulomb pseudopotential from 50.96 meV to 30.12 meV. The high values of$2\Delta(0)$ mean that the dimensionless ratio $R_{\Delta}\equiv2\Delta(0)/k_{B}T_{C}$ significantly exceeds the value predicted by theclassical BCS theory. In the considered case: $R_{\Delta}\in<4.55,4.29>$. Dueto the unusual dependence of the critical temperature and the energy gap on$\mu^{\star}$, the analytical expressions for $T_{C}(\mu^{\star})$ and$\Delta(\mu^{\star})$ have been given.

On the critical temperature and the energy gap in dense SiH4(H2)2 at 250 GPa