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What is sin[itex]_{2}[/itex][itex]\theta[/itex]min in regards to XRD

  1. Jun 4, 2013 #1
    Hi i have 2[itex]\theta[/itex] and have found sin[itex]_{2}[/itex][itex]\theta[/itex] from that but what does sin[itex]_{2}[/itex][itex]\theta[/itex]min refer to?

    i attached the graph i'm trying to fill out, the information i have is; the peak list with 2[itex]\theta[/itex] the height of the peak in counts, FWHM Left, d-spacing and the relative intensities of the peaks

    anyone know what is meant by sin[itex]_{2}[/itex][itex]\theta[/itex]min

    Attached Files:

  2. jcsd
  3. Jun 5, 2013 #2


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    First, you are writing it wrong. It is NOT "[itex]sin_2\theta_{min}[/itex]", it is [itex](sin^2(\theta))_{min}[/itex]. The important thing is that the "min" is not on the [itex]\theta[/itex], it is on the entire function.

    That is, it means the minimum value of [itex]sin^2(\theta)[/itex] over all possible values of [itex]\theta[/itex].
    Last edited by a moderator: Jun 5, 2013
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