Details of GSAS fit for ZnO 674b data jun/11bmb_4715

# Run no. =               4715 
# No. steps =             34500 
# Scan time =             MAY 31, 2014 23:52
# Sample name =     	  NIST SRM 674b (ZnO)
# Composition =           Zinc Oxide
# Sample Comment =        0.8 mm dia Kapton
# Temp (K) =              295.0 
# 2theta step (deg) =     0.001 
# Time per step (sec) =   0.1 
# 100/Ring Current[0] =   1.025  
# Monitor I0 [0] =        89933.5  
# Monitor I1 [0] =        73484.6  
# Gonio._radius [mm] =    1000.0 
# Calibration file =      11bmb_4699_2thcorr.calib
# 2Theta correction subtracted 
# Calibrated wavelength = 0.413671 
# Normalization factor  = 8.1812 

GSAS Fit Summary of 11-BM ZnO 674b Data 
# by Matthew Suchomel at APS/ANL, 2014

Using GSAS/EXPGUI
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lattice a =       3.24999 (refined)
 SRM lattice a  = 3.24989 A
 Delta lattice a from SRM = 0.0001 A

lattice c =       5.20684 (refined)
 SRM lattice c  = 5.20653 A
 Delta lattice c from SRM = 0.0003 A

Lambda =  0.413671 A   (FIXED)

Zn X,Y,Z = 0.333300  0.666700  0.000881  (refined)
Zn Uiso = 0.005
O X,Y, Z, = 0.333300  0.666700  0.381619  (refined)
O Uiso = 0.004

background = 6-term Shifted Chebyschev (type #1)
GSAS Profile type 4
GU = 1.35  (refined) 
GV = -0.36 (refined) 
GW = 0.092 (refined) 
LX = 0.86 (refined; gives ~ 275 nm particle, vs SRN value of 201 nm) 
S1 = 3.252E-02 (refined)
S2 = 0         (refined)
S3 = 1.552E-02 (refined)
SH/L = 0.0011 (FIXED)

2th zero (deg) =  0.00013 (refined)
Absorption (mR/L) = 0.0 (FIXED)

Rwp % = 8.4%
chi**2 = 1.56