>I would like to see (or do) the single crystal experiment in
>order to definitively characterize the "tube tails". I suspect that the
>answer to the Armel's question is both.
Both ( ? J"org Bergmann does not seem to believe in Kalpha3)
and much more...
Some years ago I put a big muscovite single crystal in the diffracting
plane of an old Philips. Observed at a normal scale, you only see
the basic 00l lines. But if you zoom a bit, you really see much more :
Cu Kbeta (1.3922 A), W-Lalpha2 (1.4765 A), W-Lbeta1 (1.2817A).
A lot of peaks appear very close to the basic lines.
That muscovite-oriented single crystal pattern is available in PowBase :
http://sdpd.univ-lemans.fr/powbase/ ,
pattern 77. It probably shows also big tube tails and maybe (?)
Kalpha3.
Best,
Armel Le Bail - Universite du Maine, Laboratoire des Fluorures,
CNRS ESA 6010, Av. O. Messiaen, 72085 Le Mans Cedex 9, France
http://www.cristal.org/