US6013204-A  Aurivillus, B., Acta Chem. Scand A37, 399-407 (1983).;  Boon, J.W., Recl. Trav. Chim. Pays-Bas 63:32 (1944).;  Borkowski, K., et al., J. Mater. Res. Bull. 22:381-387 (1987).;  Bronger, W., et al., Z Anorg Allg Chem 622: (6) 1003-1005 Jun. (1996).;  CRC Handbook of Chemistry and Physics. 7th ed.; Lide D.R., ED.; CRC Press: Boca Raton, Fl. pp. 12-62 (1990).;  Chaikin, P.I., et al., Rev. Sci. Instrum. 46:218-220 (1975).;  Champness, C.H., Chiang, P.T., Parekh, P. Can. J. Phys. 43:653-659 (1965).;  Champness, C.H., Chiang, P.T., Parekh, P. Can. J. Phys. 45:3611-3626 (1967).;  Chizhevskaya, S.N., et al., Inorg. Mater. 31:1083-1095 (1995).;  Choi, K.-S., et al., Inorg. Chem. 36:3804-3805 (1997).;  Chung, D.-Y., et al., J. Am. Chem. Soc., In Press.;  Chung, D.-Y., et al., Mat. Res. Soc. Symp. Proc. 478: 333-344 (1997).;  Chung. D.-Y., et al., Mat. Res. Soc. Symp. Proc. 453:15-22 (1997).;  Cordier, G., et al., A New Layer Selenido-bismutate (III) Rev Chim Miner 22: (5) 676-683 (1985).;  Cordier, G., et al., Rev. Chim Miner. 22:676-683 (1985).;  Cordier, G., et al., Rev. Chim. Miner. 18:218-223 (1981).;  Cordier, G., et al., Rev. Chim. Miner. 19:179-186 (1982).;  Cordier. G., et al., Rev. chim. Miner. 22:631-638 (1985).;  Dorrscheidt, W., et al., Z. Naturforsch. 36B 410-414 (1981).;  Eisenmann, B., et al., Naturforsch. 44b, 249-256 (1989).;  Eisenmann, G., et al., Z Kristallogr 197 (3-4) 257-258 (1991).;  Encyclopedia of Materials Science and Engineering, Thermo-electri Semiconductors; MIT Press; Cambridge, MA; Pergamon Press: Oxford, p. 4968 (1986).;  Feher, F., Handbuck der Praparativen Anorganischen Chemie: Brauer, G., Ed.; Ferdinand Enke: Stuttgart, Germany p. 280-281 (1954).;  Gattow, G., et al., Anorg. Allg. Chem. 279:324-327 (1955).;  Gildart, L., et al., J. Phys. Chem. Solids 28:246 (1961).;  Glemser, O., et al., Anorg. Allg. Chem 279: 321-323 (1955).;  Horak, H., et al., J. Phys. Chem. Solids 47: 805- 809 (1986).;  Jeon, H.-H., Ha, H.-P, Hyun, D.-B., Shim, J.-D., J. Phys. Chem. Solids 4:579-585 (1991).;  Kanatzidis, M. G., et al., Chem. Mater, 8:1465-1474 (1996).;  Kanatzidis, M.G., et al., Mater. Res. Soc. Symp. Proc. 410:37-43 (1996).;  Kanischeva, A. S., et al., Kokl. Adad. Nauk. SSSR (Kryst.) 252:96-99 (1980).;  Kittel, C., Introduction to Solid State Physics, 6th ed.; John Wiley & Sons, Inc.: New York p. 150 (1986).;  Klemm, W., et al., Anorg. Allg. Chem. 241:281-304 (1939).;  Kotum, G., Reflectance Spectroscopy; Springer-Verlag: New York, (1969).;  Lostak, P., et al., Phys Status Solidi 76:k71-k75 (1983).;  Lyding, J.W., et al., IEEE Trans. Instrum. Meas. 37:76-80 (1988).;  MaCarthy T.J., et al., J. Am. Chem. Soc. 117:1294-1301 (1995).;  McCarthy T.J., et al., Inorg. Chem. 33:1205-1211 (1994).;  McCarthy, T.J., et al., Chem. Mater. 5 331-340 (1993).;  McCarthy, T.J., et al., Chem. Mater. 5:331-340 (1993).;  Nayak, B.B., et al., J. Mater. Sci., 21:46 (1986).;  Scherrer, H., et al., CRC Handbook of Thermolectrics; Rowe, D.M., Ed.; CRC Press: Boca Raton. FL pp. 211-237 (1995).;  Schmitz, D., et al., Naturforsch, 29b:438-439 (1974).;  Sheldrick, W.S., et al., Naturforsch 45B 1643-1646 (1990).;  Sheldrick, W.S., et al., Z. Anorg, Allg. Chem. 557, 98-104 (1988).;  Sheldrick, W.S., et al., Z. Anorg. Allg. Chem. 536:114-118 (1986).;  Sheldrick, W.S., et al., Z. anorg. Allg. Chem., 561: 149-156 (1988).;  Slack, G.A., In CRC Handbook of Thermoelectrics; Rowe D.M., ED.; CRC Press: Boca Raton, FL pp. 407-440 (1995).;  Smith, R.A., Semiconductors, 2nd ed.; Cambridge University Press; New York (1978).;  Tandon, S.P., et al., Phys, S.P., et al., Phys. Status Solidi 38:363-367 (1970).;  Testardi, L.R., Bierly, H.N. Jr., Donahoe, F.J., J. Phys. Chem. Solids 23:1209 (1962).;  Volk, K., et al., Naturforsch. 35b, 136-140 (1980).;  Voroshilov, Y. V., et al., Inorg. Mater. 8:777-778 (1972).;  Voroshilov, Y.V., et al., Inorganic Materials 8 677-678 (1972).;  Wendlandt, W.W., et al., Relfectance Spectroscopy; Inter-science Publishers: New York (1966).;  Yim, W. M., J. Electrochem. Soc. 115:556-560 (1966).;  Yim, W.M., et al., J. Mater Sci. 1:52-56 (1966).;  Zalar, S.M., Adv. Energy Conv. 2:105-112 (1962).