Uncle Al
Nov28-04, 06:02 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Our quartz grower exploded his autoclave We are now four months out\nof schedule.\n\nhttp://www.mazepath.com/uncleal/qz.pdf\nOptically right-handed quartz vs. fused silica is currently running\n\n1) Does anybody know of any quartz growers who do optically\nleft-handed, space group P3(1)21, quartz? We need a z-plate at least\nan inch thick on each side outside the seed plate. We need to cut\nfour inch-diameter 2-cm high z-sector cylinders, height parallel to\ncrystallographic c-axis. Bigger is better.\n\n2) Does anybody know of any natural crystal sources of sufficient\nquality? Inclusions, haze, color, twinning (Brazil, Dauphine,\nJapanese, etc.)... in the active volume are unacceptable. Minas\nGerais, Brazil producers don\'t seem to have websites. Arkansas\nproduction is heavily Brazil twinned. The National Defense Stockpile\nis a nightmare unless somebody knows somebody.\n\nPost a reply or e-mail inside the top of the pdf, above\n\nOptical handedness is defined in the opposite direction to geometric\nhandedness. Optically left-handed quartz is geometrically\nright-handed, space group P3(2)21. The sense of helicity is the same\nin both cases. All commercial cultured quartz production is optically\nright-handed, space group P3(2)21, for electronics.\n\nThe procedure for orienting and determining handedness is described\nquite nicely in "Procedures in Experimental Physics" by John Strong,\net. al., 1938 (reprint 1986).\n\n<http://www.amazon.com/exec/obidos/tg/detail/-/0137235771/104-5595925-8279142?v=glance>\n\nAlso, Henry E. Paul from "Book Three of \'Amateur Telescope Making\'"\n(1953 edition by Scientific American) on "Building a Birefringent\nPolarizing Monochromator for Solar Prominences." Starting on page 376\nit describes acquiring, testing (and building the test equipment),\nproperly aligning, and polishing optical quartz.\n\nFinally, optical handedness is defined in the opposite direction to\ngeometric handedness. That is why optically left-handed quartz is\ngeomtrically righthanded, space group P3(2)21. The sense of helicity\nis in fact identical in both cases. We specifically need untwinned\nsingle crystal optically left-handed space group P3(1)21 quartz.\n\nThank you!\n\n--\nUncle Al\nhttp://www.mazepath.com/uncleal/\n(Toxic URL! Unsafe for children and most mammals)\nhttp://www.mazepath.com/uncleal/qz.pdf\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>Our quartz grower exploded his autoclave We are now four months out
of schedule.
http://www.mazepath.com/uncleal/qz.pdf
Optically right-handed quartz vs. fused silica is currently running
1) Does anybody know of any quartz growers who do optically
left-handed, space group P3(1)21, quartz? We need a z-plate at least
an inch thick on each side outside the seed plate. We need to cut
four inch-diameter 2-cm high z-sector cylinders, height parallel to
crystallographic c-axis. Bigger is better.
2) Does anybody know of any natural crystal sources of sufficient
quality? Inclusions, haze, color, twinning (Brazil, Dauphine,
Japanese, etc.)... in the active volume are unacceptable. Minas
Gerais, Brazil producers don't seem to have websites. Arkansas
production is heavily Brazil twinned. The National Defense Stockpile
is a nightmare unless somebody knows somebody.
Post a reply or e-mail inside the top of the pdf, above
Optical handedness is defined in the opposite direction to geometric
handedness. Optically left-handed quartz is geometrically
right-handed, space group P3(2)21. The sense of helicity is the same
in both cases. All commercial cultured quartz production is optically
right-handed, space group P3(2)21, for electronics.
The procedure for orienting and determining handedness is described
quite nicely in "Procedures in Experimental Physics" by John Strong,
et. al., 1938 (reprint 1986).
<http://www.amazon.com/exec/obidos/tg/detail/-/0137235771/104-5595925-8279142?v=glance>
Also, Henry E. Paul from "Book Three of 'Amateur Telescope Making'"
(1953 edition by Scientific American) on "Building a Birefringent
Polarizing Monochromator for Solar Prominences." Starting on page 376
it describes acquiring, testing (and building the test equipment),
properly aligning, and polishing optical quartz.
Finally, optical handedness is defined in the opposite direction to
geometric handedness. That is why optically left-handed quartz is
geomtrically righthanded, space group P3(2)21. The sense of helicity
is in fact identical in both cases. We specifically need untwinned
single crystal optically left-handed space group P3(1)21 quartz.
Thank you!
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
of schedule.
http://www.mazepath.com/uncleal/qz.pdf
Optically right-handed quartz vs. fused silica is currently running
1) Does anybody know of any quartz growers who do optically
left-handed, space group P3(1)21, quartz? We need a z-plate at least
an inch thick on each side outside the seed plate. We need to cut
four inch-diameter 2-cm high z-sector cylinders, height parallel to
crystallographic c-axis. Bigger is better.
2) Does anybody know of any natural crystal sources of sufficient
quality? Inclusions, haze, color, twinning (Brazil, Dauphine,
Japanese, etc.)... in the active volume are unacceptable. Minas
Gerais, Brazil producers don't seem to have websites. Arkansas
production is heavily Brazil twinned. The National Defense Stockpile
is a nightmare unless somebody knows somebody.
Post a reply or e-mail inside the top of the pdf, above
Optical handedness is defined in the opposite direction to geometric
handedness. Optically left-handed quartz is geometrically
right-handed, space group P3(2)21. The sense of helicity is the same
in both cases. All commercial cultured quartz production is optically
right-handed, space group P3(2)21, for electronics.
The procedure for orienting and determining handedness is described
quite nicely in "Procedures in Experimental Physics" by John Strong,
et. al., 1938 (reprint 1986).
<http://www.amazon.com/exec/obidos/tg/detail/-/0137235771/104-5595925-8279142?v=glance>
Also, Henry E. Paul from "Book Three of 'Amateur Telescope Making'"
(1953 edition by Scientific American) on "Building a Birefringent
Polarizing Monochromator for Solar Prominences." Starting on page 376
it describes acquiring, testing (and building the test equipment),
properly aligning, and polishing optical quartz.
Finally, optical handedness is defined in the opposite direction to
geometric handedness. That is why optically left-handed quartz is
geomtrically righthanded, space group P3(2)21. The sense of helicity
is in fact identical in both cases. We specifically need untwinned
single crystal optically left-handed space group P3(1)21 quartz.
Thank you!
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf