Blasse, 1964, Philips Res. Rep.
Waldron, 1955, Phys. Rev., 99, 1727, 10.1103/PhysRev.99.1727
Tarte, 1963, Spectrochim. Acta., 19, 49, 10.1016/0371-1951(63)80093-4
Preudhomme, 1964, Spectrochim. Acta, 20, 275, 10.1016/0371-1951(64)80023-0
Tarte, 1963, Acta Cryst., 16, 227, 10.1107/S0365110X63000530
Tarte, 1963, Acta Cryst., 16, 228, 10.1107/S0365110X63000542
Hafner, 1961, Z. Krist., 115, 321, 10.1524/zkri.1961.115.5-6.321
Hafner, 1961, Z. Krist., 115, 331, 10.1524/zkri.1961.115.5-6.331
Verwey, 1947, J. Chem. Phys., 15, 174, 10.1063/1.1746464
Datta, 1961, Nature, 191, 169, 10.1038/191169a0
Bhagavantam, 1939, Proc. Indian Acad. Sci., 9A, 224
Hunt, 1964, Phys. Rev., 134, A688, 10.1103/PhysRev.134.A688
Barker, 1964, Phys. Rev., 135A, 742, 10.1103/PhysRev.135.A742
Mitsuishi, 1958, J. Phys. Soc. Japan, 13, 1236, 10.1143/JPSJ.13.1236
Busey, 1964, J. Chem. Phys., 41, 215, 10.1063/1.1725625
Winston, 1949, J. Chem. Phys., 17, 607, 10.1063/1.1747346
Hornig, 1948, J. Chem. Phys., 16, 1063, 10.1063/1.1746726
Mitra, 1961, Z. Krist., 116, 149, 10.1524/zkri.1961.116.1-2.149
Haas, 1965, J. Phys. Chem. Solids, 26, 1225, 10.1016/0022-3697(65)90101-0
Datta, 1963, J. Am. Ceram. Soc., 46, 388, 10.1111/j.1151-2916.1963.tb11757.x