¿Sure about the cell parameter? I was used to
Hubbard et al (1975) 543.0880(35) pm or Siegert & Becker (1984) 543.101988(48) pm which already differ by 4 esd, ¿but now we would have >19 esd? Miguel On 3 Jul 2005 at 3:52, L. Cranswick wrote: > > Is there an "official" table of NIST 640c Silicon cell axes (with ESD) > for when NIST 640c is not exactly measured at 22.5 °C (say anywhere > between 5°C to 40°C) > > Using the certificate reference via: > https://srmors.nist.gov/view_cert.cfm?srm=640C > The certified lattice parameter for a temperature of 22.5 °C is > 0.54311946 nm ± 0.00000092 nm > > The NIST certificate mentions the thermal expansion coefficient which > was applied to the measured peaks. > > For those who like their XRD calibrations and/or wavelengths backed up > all the way with a bit of NIST Onion Paper, it would be nice to have > such a table (or the range in which the stated thermal expansion > coefficient in the certificate (and certificate ESD) is valid). > > (Some labs have different air-conditioning temperatures / or lack of > room temperature control). > > Lachlan > > > -- > ----------------------- > Lachlan M. D. Cranswick > Contact outside working hours / > Coordonnees en dehors des heures de travail: > E-mail / courriel: [EMAIL PROTECTED] Home Tel: (613) 584-4226 > Mobile/Cell: 613 401 3433 WWW: http://lachlan.bluehaze.com.au/ > P.O. Box 2057, Deep River, Ontario, Canada, K0J 1P0 > > (please use clear titles in any Email - otherwise messages might > accidentally get put in the SPAM list due to large amount of junk > Email being received. If you don't get an expected reply to any > messages, please try again.) > > (Essayez d'utiliser des titres explicites - sans quoi vos messages > pourraient aboutir dans un dossier de rebuts, du fait de la quantite > tres importante de pourriels recue. Si vous n'obtenez pas la reponse > attendue, merci de bien vouloir renvoyer un message.) > > -- Miguel Gregorkiewitz Dip Scienze della Terra, Università via Laterino 8, I-53100 Siena, Europe fon +39'0577'233810 fax 233938 email [EMAIL PROTECTED]
