M.A. Cooper, F.C. Hawthorne, W.W. Pinch, J.D. Grice (1999) Andyrobertsite and calcioandyrobertsite: two new minerals from the Tsumeb mine, Tsumeb, Namibia. Mineral. Record, 30, 181–186.

The minerals form a lamellar intergrowth that is crystallographically continuous. Electron microprobe analyses for andyrobertsite and calcioandyrobertsite gave, respectively, K2O 4.00, 4.05, CaO 1.36, 3.52, MnO 0.64, 0.86, CdO 6.48, 1.26, ZnO 0.19, 0.04, CuO 31.72, 32.86, As2O5 47.58, 49.56, H2O (calc.) 4.44, 4.61, sum 96.41, 96.75 wt%, corresponding to K1.03(Cd0.61Ca0.30Mn0.11)Σ1.02(Cu4.85Zn0.03)Σ4.88(AsO4...

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