Parameter	T_4	T_4-T_1	H_3-T_1
z_Bi(0 )-Si(1) (Ang.)	-	2.578	2.576
Delta z_Bi(0 )	+0.732	-	-
Delta r_Bi(0 )	-	+0.003	+0.003
Delta z_Si(1 )	-0.027	-0.004	-0.005
Delta r_Si(1 )	-0.107	-0.042	-0.034
Delta z_Si(2a)	-0.282	-0.103	-0.005
Delta r_Si(2a)	-	-	+0.029
Delta z_Si(2b)	+0.116	+0.046	-
Delta z_Si(3a)	-0.272	-0.082	-0.005
Delta r_Si(3a)	-	-	+0.006
Delta z_Si(3b)	+0.102	+0.036	-
Total Energy (eV)	1.039	0.044	0.059
Length Term	0.009	0.004	0.002
Angle Term	1.031	0.040	0.057
d_Bi(0 )-Si(1 ) (Ang.)	2.613	2.625	2.625
d_Bi(0 )-Bi(0 )	-	2.905	2.905
d_Si(1 )-Si(2a)	2.350	2.346	2.348
d_Si(1 )-Si(2b)	2.360	2.354	-

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Last Update: 6/21/96