There was in 2000 a discussion, already, which never has been cleared up. http://www.mail-archive.com/[email protected]/msg01203.html
Cheers Michael ======================================== Dr. Michael Nippus Huber Diffraktionstechnik GmbH & Co. KG Sommerstrasse 4 D-83253 Rimsting / Chiemsee, Germany mailto:[EMAIL PROTECTED] http://www.xhuber.com Tel: +49(0)8051 68780 Fax: +49(0)8051 687810 ======================================== > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Monday, July 04, 2005 8:57 AM > To: [email protected] > Subject: Re: RIET: NIST Si 640c cell axis as a function of temperature? > > > ¿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] > > > >
