11BM Calibration Sample: Lattice & Atomic Position Values

Calibration of the wavelength at 11-BM is performed using a mixture of NIST standard reference materials (SRMs). As of 2011, the calibration sample is a mixture of ~ 70 wt% Si (SRM 640c) and ~ 30 wt% Al2O3 (SRM 676).

Lattice & Atomic Position Values are as follows:

Si (SRM 640c)

lattice 
a = 

atom    x      y       z
 Si 

Wt. Frac.:    0.29019

a x y z Si 0.125000 0.125000 0.125000

Wt. Frac.:    0.70981  

a b c 4.759728 4.759728 12.993473

x y z Al 0.000000 0.000000 0.352011 O 0.306702 0.000000 0.250000