Gallagher S.A., McCarthy G.J. J. Inorg. Nucl. Chem. 1981, 43:1773.
Richerson D.W., Hummel F.A. J. Am. Ceram. Soc. 1972, 55:269.
Voldan J. Silikaty (Prague) 1981, 25:165.
.
Figusch V. Silikaty 1981, 25:73.
Ihara M., Kamei F. Yogyo-Kyokai-Shi 1980, 88:32.
Shannon R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica Section A 32:751.
Tarte P., Cahay R., Rulmont A., Werding G. Spectrochim. Acta 1985, 41 A:1215.
Martin R.F., Lagache M. Can. Mineral. 1975, 13:275.
Kume S., Koizumi M. Am. Mineral. 1965, 50:587.
Bayer G. Naturwiss. 1973, 60:102.
Galli E., Gottardi G., Mazzzi F. Miner. Petrogr. Acta 1978, 22:185.