Citation: Stock, N.; Stucky, G.D.; Cheetham, A.K. (2002). Synthesis and characterization of the synthetic minerals villyaellenite and sarkinite, Mn5 (As O4)2 (H As O4)2 * 4(H2 O) and Mn2 (As O4) (O H). Zeitschrift fuer Anorganische und Allgemeine Chemie, 628, pp. 357-362.