Dear all,
I too have posed style similar questions to Arnt Kern at Bruker.
He pointed me to amongst other sources Wikipedia for a general
background in this topic.
However Im still keen to get a better understanding of
use/parameterisation within Topas and I too welcome any contributions to
this subject.
Dr Tim Hyde
Principal Scientist
Johnson Matthey Technology Centre
Blounts Court
Sonning Common
Reading RG4 9NH
Tel: +44 (0) 118 924 2152
Fax: +44 (0) 118 924 2254
email [EMAIL PROTECTED]
>>> <[EMAIL PROTECTED]> 19/04/08 00:40 >>>
Dear all,
Now i am using the Topas Academic software to do the refinement of my
sample which has stronger preferred orientations in some directions.
In the program, i use the general spherical harmonics function to
correlate the effect, as shown as below,
'Preferred Orientation using Spherical Harmonics
PO_Spherical_Harmonics(sh, 6 load sh_Cij_prm {
k00 !sh_c00 1.0000
k41 sh_c41 0.36706`
k61 sh_c61 -0.30246`
} )
And I see the literature, texture index J is used to evaluate the
extent of PO by the equation shown in attachment ( I don't how to put
the equation here).
But I am not sure what the l means and it’s not easy to find the
detailed calculation in the literature. So I am wondering could
someone of you give me some advice of the meaning of parameters m, n,
l and in my case. Is the l is equal to 4 and 6?
Thank you very much for all your help and time.
Xiujun Li
Master Student
Advanced Materials and Processing Laboratory
Chemical and Materials Engineering
University of Alberta
Edmonton, Alberta, Canada T6G 2G6
Phone: 1-780-492-0701
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