Table 3.11: The bond lengths and the Keating energies for the relaxed T_4-model surfaces of Ge{111}rt3*rt3-30-X, as determined by a Keating analysis.

Table 3.11: The bond lengths and the Keating energies for the relaxed T_4-model surfaces of Ge{111}rt3*rt3-30-X, as determined by a Keating analysis.
The tetrahedral covalent radii for C, B, Si, Ge, Al, Ga, Sn, In, and Pb are 0.77, 0.88, 1.18, 1.22, 1.26, 1.26, 1.40, 1.44, and 1.46 Ang., respectively.

Parameter R_X=0.98 (Ang.) 1.08 1.18 1.28 1.38 1.48

d_X (0 )-Ge(2a) (Ang.) 1.87 2.05 2.22 2.35 2.51 2.67

d_X (0 )-Ge(1 ) 2.24 2.33 2.42 2.51 2.60 2.70

d_Ge(1 )-Ge(2a) 2.42 2.43 2.44 2.44 2.44 2.45

d_Ge(1 )-Ge(2b) 2.48 2.48 2.47 2.47 2.46 2.46

d_Ge(2a)-Ge(3a) 2.43 2.43 2.43 2.43 2.44 2.44

d_Ge(2b)-Ge(3b) 2.47 2.47 2.47 2.47 2.47 2.46

d_Ge(3a)-Ge(4 ) 2.44 2.44 2.44 2.44 2.45 2.45

d_Ge(3b)-Ge(4 ) 2.46 2.46 2.45 2.45 2.45 2.45

Total Energy (eV) 1.200 1.144 1.117 1.119 1.147 1.205

Bond Term 0.065 0.044 0.026 0.018 0.012 0.010

Angle Term 1.134 1.100 1.091 1.100 1.135 1.195

Parameter	R_X=0.98 (Ang.)	1.08	1.18	1.28	1.38	1.48


d_X (0 )-Ge(2a) (Ang.)	1.87	2.05	2.22	2.35	2.51	2.67
d_X (0 )-Ge(1 )	2.24	2.33	2.42	2.51	2.60	2.70
d_Ge(1 )-Ge(2a)	2.42	2.43	2.44	2.44	2.44	2.45
d_Ge(1 )-Ge(2b)	2.48	2.48	2.47	2.47	2.46	2.46
d_Ge(2a)-Ge(3a)	2.43	2.43	2.43	2.43	2.44	2.44
d_Ge(2b)-Ge(3b)	2.47	2.47	2.47	2.47	2.47	2.46
d_Ge(3a)-Ge(4 )	2.44	2.44	2.44	2.44	2.45	2.45
d_Ge(3b)-Ge(4 )	2.46	2.46	2.45	2.45	2.45	2.45


Total Energy (eV)	1.200	1.144	1.117	1.119	1.147	1.205
Bond Term	0.065	0.044	0.026	0.018	0.012	0.010
Angle Term	1.134	1.100	1.091	1.100	1.135	1.195

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Last Update: 6/21/96