I am finding slightly similar-looking pictures of twinned pyrite crystals and therefore hoping they are not fool's gold ;-)
Best wishes, Jon.C. Sent from ProtonMail mobile -------- Original Message -------- On 16 Feb 2021, 21:00, Gerlind Sulzenbacher wrote: > Dear Dale, > > A warm thank you for pointing out what I had overseen. > > And a big thanks to all the others who commented so far, > > cheers, > Gerlind > > On 16/02/2021 21:19, Dale Tronrud wrote: >> >> >> On 2/16/2021 11:47 AM, Gerlind Sulzenbacher wrote: >>> Dear all, >>> >>> I wonder whether any of you have ever encountered such strange crystals. >>> >>> In the images you can download via the link below, crystal1 looks >>> hollow, crystal2 looks like a cubic crystal embedded within a >>> hexagonal arragement. >> >> I don't know the cause of the overall appearance that your cubic >> crystals are embedded within larger cubic objects. I do know that the >> projection of a cube, down its three-fold axis, to a plane will create >> a hexagon. I think that is the case in your second photo. The >> six-fold symmetry is actually the result of a special view of the same >> cubes you are seeing elsewhere. >> >> Dale Tronrud >> >>> >>> https://filesender.renater.fr/?s=download&token=71d70da4-5ea2-4cf3-ae5f-5d89545574ce >>> >>> >>> May be all this is just an optical Fata Morgana. >>> >>> We are waiting for our next synchrotron beam time to see whether, and >>> what kind of diffraction they could provide. >>> >>> In the meanwhile, I leave you with the beauty and may be somebody >>> want's to comment. >>> >>> with best wishes, >>> >>> Gerlind >>> > > -- > Gerlind Sulzenbacher > Architecture et Fonction des Macromolécules Biologiques > UMR7257 CNRS, Aix-Marseille Université > Case 932 > 163 Avenue de Luminy > 13288 Marseille cedex 9 > France > Tel +33 491 82 55 66 > Fax +33 491 26 67 20 > E-mail: [email protected] > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 > > This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing > list hosted by www.jiscmail.ac.uk, terms & conditions are available at > https://www.jiscmail.ac.uk/policyandsecurity/ ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/
