The sphere of Silicon 28 is formed from a *pure crystal* of isotope 28 having *no* voids or impurities contained within. This state of purity has, no doubt, been verified by x-ray examination, although I have no direct proof of this ideal verification at the moment.
Eugene Mechtly ________________________________ From: Kilopascal [kilopas...@cox.net] Sent: Saturday, June 08, 2013 2:15 PM To: Berenger; Steinberg Ezra; Darfus Jason; augustine; Maenen Han; Williamson Tim; Potts Bill; Pollard Derek; Payne Mike; Kocz Remek; MacDonald Carleton; Bushnell Robert H; Moore Patrick; Chernack Phil; Stone Ron; Winn Andrew; Ressel Howard; Jakuba Stanislav; Frysinger Jim; Altounji John; Schlessinger Edward; Planicka Michael; Frewen-lord John; Bushnell Helen; i...@metricrules.org; Fletcher Anthony; Anderman Linda; O'dell Derry; Vliestra Martin; Burns Eric; Rodriguez Zach; Moon Marion; lee Jack; Trusten Paul; Davis Stephen; Steele John; Mechtly Gene; Hilger Don Subject: Re: World's Roundest Object! - YouTube Is this method foolproof? Even a perfect sphere is going to have holes in it. They may be assuming that every space in the bounds of the sphere contains a silicon atom, when in fact it may be empty space. So in essence they will assume the mass of the missing silicon atoms as if they are there, thus producing a unforeseen error in the actual kilogram definition. How is this possibility accounted for? From: mechtly, eugene a<mailto:mech...@illinois.edu> Sent: Saturday, 2013-06-08 14:41 To: Kilopascal<mailto:kilopas...@cox.net> ; U.S. Metric Association<mailto:usma@colostate.edu> Cc: mechtly, eugene a<mailto:mech...@illinois.edu> Subject: RE: World's Roundest Object! - YouTube The sphere of silicon 28 is only an intermediate step to "calculating" the number of atoms inside the sphere of precisely measured diameter, and precisely calculated volume. The precise number of atoms inside this volume would then *correct* (refine) the numerical value of Avagadro's Number which would then lead to a more direct redefinition of the kilogram. The redefinition would then *become* independent of the artifact itself which, of no further use, might be placed in a museum to gather dust. A decision on the choice of the silicon sphere *or* the watt-balance is forecast for the next meeting of the CGPM in 2014. There seems to be a preference by the experts at this moment for the watt-balance. Uncertainties in replication of experimental results is still delaying a clear and unambiguous choice. There is *no prospect* that both will be chosen to establish "two standards" simultaneously for a redefinition of the kilogram. ________________________________ From: Kilopascal [kilopas...@cox.net] Sent: Saturday, June 08, 2013 10:58 AM To: U.S. Metric Association Subject: Re: World's Roundest Object! - YouTube Do we know to what extent the scientific community has reached that they can make a decision as to the redefinition of the kilogram. Can it be possible to have two standards, such as the silicon ball and the watt balance? The silicon ball is actually still a physical artifact that can change with time just like the cylinder. The watt balance is more in line with a non-physical device, but with the watt-balance, the coulomb and the volt become basic natural constants and the kilogram is derived. From: mechtly, eugene a<mailto:mech...@illinois.edu> Sent: Friday, 2013-06-07 13:33 To: Kilopascal<mailto:kilopas...@cox.net> ; U.S. Metric Association<mailto:usma@colostate.edu> Cc: mechtly, eugene a<mailto:mech...@illinois.edu> Subject: RE: World's Roundest Object! - YouTube If you want to learn more about the silicon-28 sphere as a contendor for the redefinition of the kilogram search for CSIRO, the Australian Commonwealth Scientific and Industrial Research Organization. From: Kilopascal [kilopas...@cox.net] Sent: Thursday, June 06, 2013 10:06 PM To: U.S. Metric Association Subject: World's Roundest Object! - YouTube Very interesting video on the kilogram. http://www.youtube.com/watch?v=ZMByI4s-D-Y No virus found in this message. Checked by AVG - www.avg.com<http://www.avg.com> Version: 2013.0.3343 / Virus Database: 3199/6390 - Release Date: 06/06/13 No virus found in this message. Checked by AVG - www.avg.com<http://www.avg.com> Version: 2013.0.3343 / Virus Database: 3199/6394 - Release Date: 06/08/13
