You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.3 KiB
R
38 lines
1.3 KiB
R
thth2d <- function(thth, wavelength = 1.540562) {
|
|
# This function applies Bragg's law to calculate d-spacings from thth (n = 1)
|
|
# Wavelengths:
|
|
# Ag-Ka1 wavelength=0.5594075
|
|
# Ag-Ka2 wavelength=0.563798
|
|
# Ag-Kb1 wavelength=0.497069
|
|
# Ag-Kb2 wavelength=0.497685
|
|
# Co-Ka1 wavelength=1.788965
|
|
# Co-Ka2 wavelength=1.792850
|
|
# Co-Kb1 wavelength=1.620790
|
|
# Cr-Ka1 wavelength=2.289700
|
|
# Cr-Ka2 wavelength=2.293606
|
|
# Cr-Kb1 wavelength=2.084870
|
|
# Cu-Ka1 wavelength=1.540562
|
|
# Cu-Ka2 wavelength=1.544398
|
|
# Cu-Kb1 wavelength=1.392218
|
|
# Fe-Ka1 wavelength=1.936042
|
|
# Fe-Ka2 wavelength=1.939980
|
|
# Fe-Kb1 wavelength=1.756610
|
|
# Ge-Ka1 wavelength=1.254054
|
|
# Ge-Ka2 wavelength=1.258011
|
|
# Ge-Kb1 wavelength=1.057300
|
|
# Ge-Kb2 wavelength=1.057830
|
|
# Mo-Ka1 wavelength=0.709300
|
|
# Mo-Ka2 wavelength=0.713590
|
|
# Mo-Kb1 wavelength=0.632288
|
|
# Mo-Kb2 wavelength=0.632860
|
|
# Ni-Ka1 wavelength=1.657910
|
|
# Ni-Ka2 wavelength=1.661747
|
|
# Ni-Kb1 wavelength=1.500135
|
|
# Zn-Ka1 wavelength=1.435155
|
|
# Zn-Ka2 wavelength=1.439000
|
|
# Zn-Kb1 wavelength=1.295250
|
|
# Usage:
|
|
# thth : vector with thth values in degrees
|
|
# wavelength : radiation wavelength in Angstrom
|
|
return (wavelength / (2 * sin(as.radians(thth))))
|
|
} |