# Changeset 4421 for trunk/GSASIIlattice.py

Ignore:
Timestamp:
May 16, 2020 8:55:12 AM (18 months ago)
Message:

add R.B. extractor; misc doc updates; plt bug after strip Hs; grid bug: uncompleted edits; mac horz. line fix

File:
1 edited

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Unmodified
 r4415 The "*A* tensor" terms are defined as :math:A = (\\begin{matrix} G_{11} & G_{22} & G_{33} & 2G_{12} & 2G_{13} & 2G_{23}\\end{matrix}) and *A* can be used in this fashion: :math:d^* = \sqrt {A_1 h^2 + A_2 k^2 + A_3 l^2 + A_4 hk + A_5 hl + A_6 kl}, where :math:d^* = \sqrt {A_0 h^2 + A_1 k^2 + A_2 l^2 + A_3 hk + A_4 hl + A_5 kl}, where *d* is the d-spacing, and :math:d^* is the reciprocal lattice spacing, :math:Q = 2 \\pi d^* = 2 \\pi / d :math:Q = 2 \\pi d^* = 2 \\pi / d. Note that GSAS-II variables p::Ai (i=0,1,...5) and p is a phase number are used for the *Ai* values. See :func:A2cell, :func:cell2A for interconversion between A and unit cell parameters; :func:cell2Gmat :func:Gmat2cell for G and cell parameters. When the hydrostatic/elastic strain coefficients (*Dij*, :math:D_{ij}) are used, they are added to the *A* tensor terms (Ai, :math:A_{i}) so that A is redefined :math:A = (\\begin{matrix} A_{0} + D_{11} & A_{1} + D_{22} & A_{2} + D_{33} & A_{3} + 2D_{12} & A_{4} + 2D_{13} & A_{5} + 2D_{23}\\end{matrix}). See :func:cellDijFill. Note that GSAS-II variables p:h:Dij (i,j=1,2,3) and p is a phase number and h a histogram number are used for the *Dij* values. ''' ########### SVN repository information ###################