...; 2 – R 1 = 0.030; 3 – R 1 = 0.035. Compounds 1 and 2 are structural analogues of two different arsenate minerals: 1 is the Sr analogue of talmessite, Ca 2 Mg(AsO 4 ) 2 · 2H 2 O, and 2 is the Sr analogue of prosperite, Ca 2 Zn 4 (AsO 4 ) 4 · H 2 O. Compound 1 is the first synthetic compound...

... associated with zincroselite ( Keller & Innes, 1986 ). The type specimen of gaitite is associated with conichalcite, austinite, adamite and prosperite ( Sturman & Dunn, 1980 ). Its empirical chemical formula is Ca 2 (Zn 0.86 Mg 0.14 )[AsO 4 ] 2 ·2H 2 O. The small fragment of gaitite used...

..., prosperite, gaitite, o’danielite, and johillerite. In addition, remnants of stranskiite, largely replaced by warikahnite, and olivenite are observed in specimens from this locality as well as an overprint of claudetite, austinite, leiteite and ludlockite. The formation conditions of these minerals are most...

... with koritnigite, prosperite, and Cu-bearing adamite. It has only been reported from this locality. Johillerite is also found in the Tsumeb mine, Namibia ( Keller et al . 1982 ), in radiating masses together with Cu-rich adamite and conichalcite in oxidized copper ore. Keller & Hess (1988) described the two...

... in geigerite, showing the octahedra in the intersheet space which connect the sheets into an open framework. (c) sarkinite, (d) jamesite, (e) prosperite, (f) villyaellenite, showing three octahedral pentamers cross-linked by arsenate tetrahedra. ...