RE: FW: [sdpd] More than 100 SDPD papers in 2002, in fact...

["Peter Zavalij" <zavalij...@binghamton.edu>]

I believe you could get more entries if you provide some kind of fill-in
form with minimum information that is needed.
About Rietveld refinement of an isostructural compound it can be challenge
not less than solving structure using LeBail extracted intensity,
e.g. pattern has to be indexed first and /or composition determined (usually
not crystallographically) in order to establish isopontial compound.
ICDD database is not free (moreover it is expensive) but on the other hand
one can get paid for submitting patterns...

Peter Zavalij
  -----Original Message-----
  From: armellebail <alb...@cristal.org> [mailto:alb...@cristal.org]
  Sent: Wednesday, February 12, 2003 2:24 PM
  To: sdpd...@yahoogroups.com
  Subject: Re: FW: [sdpd] More than 100 SDPD papers in 2002, in fact...


  > Well, it is not as bad as it seems, it is much worse.

  Not as worse as ICDD a few years ago, with 60000
  entries instead of 300000 ;-).

  Moreover, the www.cristal.org staff is quite small
  (one manager) and is really a "not for profit
  organization". I would welcome any gift of
  180000 entries from CSD and 50000 from ICSD.

  The problem is that it is not really apparent in
  these databases if a powder structure is the result of
  a Rietveld refinement starting from an isostructural
  compound or if it is a true SDPD. The ICDD old version
  even did not provided the information if the crystal
  structure was determined or not.

  When crystallographers will be tired to buy all
  these fragmented databases, maybe they will do
  something. A role for IUCr ? If not, a role for whom ?

  At least the SDPD-Database is free access. Not an
  excuse for incompleteness, though.

  Best,

  Armel



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