(VYACHESLAVITE U4+(PO4)(OH).NH2O - A NEW URANIUM PHOSPHATE. ArticleBelova I.N., Gorshkov A.I., Ivanova O.A., Sivtsov A.V., Lizorkina L.I., Boronikhin V.A.Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva. Vol. 113. 1984. P.. 360-365