tetrasilver tetraoxide is therefore formulated as AgIAgIIIO2 or Ag2O·Ag2O3. It has previously been called silver peroxide, which is incorrect since it does not contain the peroxide ion, O22−.
Tetrasilver tetraoxide is formulated as AgIAgIIIO2 or Ag2O·Ag2O3.  It was formerly known as silver peroxide, but this name is inaccurate since it doesn't include the peroxide ion (O2−).