Citation: Dal Bo, Fabrice; Hatert, Fr\'ed\'eric (2012). Fe~6.67~(PO~4~)~5.35~(HPO~4~)~0.65~ and Fe~6.23~(PO~4~)~4.45~(HPO~4~)~1.55~: two new mixed-valence iron phosphates. Acta Crystallographica Section C, 68, pp. i83-i85.
Formula: Fe6.23 H1.55 O24 P6
Chemical name:Heptairon tetraphosphate bis(hydrogen phosphate)