Date: Fri, 12 Jan 2001 09:48:49 -0600 (CST) From: Yvonne Leduc Subject: Re: low temp. measurements To: standa.danis@atlas.cz Cc: s.t.xtal_l@ill.fr Dear Mr. Danis, Cryoguard has a product that irreversibly changes colour at 4 low temperatures between -40C to -120C. You can read more on their website at: www.cryoguard.com What kind of material is in the product, I don't know, and it's probably a secret. Yvonne Leduc Univ of Saskatchewan Canada >Dear coleagues, > > I need help. I would like to check the temperature sensor in a >low temperature chamber. Do you know any materials (metals or >inorganics compound) with known low temp. behavior - temperature >dependence of lattice constants or transitions at low T? > >Best Regards, > >Mr.S.Danis >Physical and chemistry laboratory >Glazura >Roudnice nad Labem >Czech Republic |
Date: Fri, 12 Jan 2001 17:21:29 +0100 To: standa.danis@atlas.cz From: Sax Mason [mason@ill.fr] Subject: Re: low temp. measurements Cc: s.t.xtal_l@ill.fr Dear S Danis some known single crystal phase transitions (some magnetic...) are U(iii) phosphide 22K & 125K TbVO4 33K MnF2 67.47 FeF2 78.38 KMnF3 81.88,91 & 187 KH2PO4 122.4K Some I have tested at ILL & I have literature references For neutron single crystal - my interest - problem may be to get suitable sample. For X-rays or powder, presumably easier. Sax Mason |