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Extra resources for Si Silicon: System Si-N. Binary and Ternary Silicon Nitrides. Silicon-Nitrogen-Hydrogen Compounds. N-Substituted Silicon-Nitrogen Compounds
SiaN? (Si3 N)n. The substance has been prepared by heating amounts of up to 10 to 20 g CaSi 2 intimately mixed with twice the theoretical amount of NH4Br to 550°C (1 to 2 h) until the sublimation of unreacted NH4Br ceases. The reaction proceeds according to 3CaSi 2+ 6NH4Br-+2Ix(SiaN)n+3CaBr2+4NHa+6H2. The reaction begins at the sublimation temperature of NH 4Br and proceeds quickly; the reaction mixture swells up, the metallic character disappears, and a brown powder is formed. The following reaction steps are assumed: 6NH4Br -+ 6NHa + 6HBr; 3CaSi 2 + 6HBr -+ 3CaBr2 + 6/x(SiH)n; 6/x(SiH)n + 2NHa -+ 6H 2 + 2Ix(SiaN)n.
95  No. 211376).  Akebono Brake Kogyo K. K. (Japan. Kokai Tokkyo Koho 81-160424 [1980/81] from C. A. 96  No. 218945). , Ltd. (Japan. A. 97  No. 153792).  Saks, N. S. S. Appl. A. 99  No. 31861).  Hemment, P. L. F. (Proc. SPIE Intern. Soc. Opt. Eng. No. A. 102  No. 213457).  Jain, F. ; Rosato, J. ; Kalonia, K. ; Agarwala, V. S. (Polym. Mater. Sci. Eng. A. 106  No. 222862).  Yamamura, A. (Japan. A. 106  No. 161018). 2 Si 2 N, Si 2 N+ Disilicon Nitride Si 2 N.
So. -(Go- He)fT (in J. mol- 1. K-1) and W - He (in kJ/mol) are : Tin K ........ Cop ........... So ........... -(Go-He)fT ... HO-He ....... 82 The internal partition function is also tabulated . The function -(Go-H2sS)fT was expanded in a power series and the JANAF data  were used to evaluate the coefficients . *) The values of  have been converted to kJ/mol or J. mol- 1. 1 MPa in . Gmelin Handbook Si Suppl. Vol. B 4 SiN 21 Spectroscopic data from  were used to give polynomial expansions of log 0 (0 = partition function) for the temperature range T =1 000 to 5000 K  and polynomial expansions for log 0 and log Kp (SiN::;=:Si + N) for the temperature range T =1000 to 9000 K .