Zur Kenntnis von Ag6(SO4)(SiO4)

About Ag₆(SO₄)(SiO₄) Hitherto unknown Ag₆(SO₄)(SiO₄) has been prepared at 400–500°C under an oxygen pressure more than 1000 atm. By single crystal X-ray work the structure of tetragonal Ag₆(SO₄)(SiO₄) has been elucidated: a = 7.060, c = 17.660 Å; D?14₁/amd; Z = 4. The crystal structure shows a new type in which the tetrahedrally sulfat- and silicat groups are definite distinguishable. As well the both crystallographic silver positions show a different crystal-chemical character.