RE: Regarding Oxygen occupancy

2014-06-09 Thread Julian R Tolchard
Rajesh, Physically speaking, an occupancy of one is generally defined to be a fully occupied site. So an occupancy greater than one makes no physical sense. Perovskites *are* sometimes described as oxygen excess though, but when it says oxygen excess it really means cation deficient. It is

RE: Re[4]: Polarization factor por Ge (111) monochromator

2014-04-07 Thread Julian R Tolchard
. [whitfiel...@ornl.gov] Sent: 07 April 2014 21:31 To: Artem Babaryk Cc: Julian R Tolchard; rietveld_l@ill.fr Subject: RE: Re[4]: Polarization factor por Ge (111) monochromator If you want some REALLY ancient history try this one... http://www.mail-archive.com/rietveld_l%40ill.fr/msg01654.html The email

RE: Polarization factor por Ge (111) monochromator

2014-04-06 Thread Julian R Tolchard
Whilst we are on the topic - is the polarization factor from a Göbel mirror calculated the same way as for a mono? From: rietveld_l-requ...@ill.fr [rietveld_l-requ...@ill.fr] on behalf of Artem Babaryk [baba...@bigmir.net] Sent: 06 April 2014 20:56 To:

RE: Zero background holders

2014-03-31 Thread Julian R Tolchard
We get the crystals from MTI (http://www.mtixtl.com/dest-topx-rayinstruments.aspx) and glue them in to holders ourselves. Alignment isn't perfect that way, but it's good enough for students :) Or you could ask your instrument supplier. jools From: rietveld_l-requ...@ill.fr