Hydrated Dodecatungstatosilicate Complex with Protonated 1,2-Phenylenediamine (C<Subscript>6</Subscript>H<Subscript>9</Subscript>N<Subscript>2</Subscript>)<Subscript>3</Subscript>(H<Subscript>3</Subscript>O)SiW<Subscript>12</Subscript>O<Subscript>40</Subscript> · 8H<Subscript>2</Subscript>O: Synthesis and Crystal Structure | AMiner