SPI Supplies 15 Rare Earth Phosphate Standard 25mm diameter x 6mm high

SPI Supplies 15 Rare Earth Phosphate Standard 25mm diameter x 6mm high
SPI Supplies 15 Rare Earth Phosphate Standard 25mm diameter x 6mm high
SPI Supplies 15 Rare Earth Phosphate Standard 25mm diameter x 6mm high - - alt view 1
$2,949.53
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Item02759-AB

This mount contains 30 well characterized glass materials, some nearly one- of-a-kind samples and others almost impossible to find anywhere. From NIST (formerly NBS) come 7 "oxide" glasses (NBS SRM 30) and 2 mineral glsses (NBS SRM 470). There are three of the famous (some might say "infamous") "Corning / Cal.Tech" silicate glass standards V, W, and X. There are also 16 of the NIH (U. S. National Institutes of Health) "low Z" glasses made by C.E.Fiori (NIH) and D .B. Blackburn (NIST) for biological x-ray microanalysis, including a lithium borate glass containing 2 mol% of Na2SO4. There is also a natural tektite glass and a fluorescent mineral calibration standard, willemite. This one block contains a powerful set of analytical standards. Unfortunately 2 items - #5 and #6 - were lost during repolishing of this mount in 2001. 

The 31 standard items are mounted on one 25mm diameter, 8mm thick epoxy resin mount ringed by brass. At the present time, this is the only format this particular product can be purchased. 

Item IDNameFormula Item IDNameFormula
1 Low Z Glass K-1685 Lithium borate   18 Tektite Glass  
2 SRM-470 Glass K-412     19 Low Z Glass 2 Mol% Na2SO4 Lithium borate
3 SRM-470 Glass K-411     20 Low Z Glass K-1626 Lithium borate
4 Willemite (Zn,Mn)2SiO4   21 Low Z Glass K-1635 Lithium borate
5 Empty     22 Low Z Glass K-1638 Lithium borate
6 Empty     23 Low Z Glass K-1615 Lithium borate
7 Glass K-495 (SRM 30) Li-B-Al B   24 Low Z Glass K-1590 Lithium borate
8 Glass K-453 (SRM 30) Ge-Pb B   25 Low Z Glass K-1668 Lithium borate
9 Glass K-497 (SRM 30) Mg-Al-P D   26 Low Z Glass K-1597 Lithium borate
10 Glass K-493 (SRM 30) Si-Pb D   27 Low Z Glass K-1658 Lithium borate
11 Glass K-490 (SRM 30) Li-B-Al D   28 Low Z Glass K-1589 Lithium borate
12 Glass K-496 (SRM 30) Mg-Al-P B   29 Low Z Glass K-1672 Lithium borate
13 Glass K-458 (SRM 30) Si-Zn-Ba B   30 Low Z Glass K-1628 Lithium borate
14 Glass K-456 (SRM 30) Si-Pb B   31 Low Z Glass K-1616 Lithium borate
15 Silicate Glass X     32 Low Z Glass K-1591 Lithium borate
16 Silicate Glass W     33 Low Z Glass K-1617 Lithium borate
17 Silicate Glass V          
B = Base elements in glass D = Contains doped elements in addition to base

 

We are sometimes asked how it could be that we have these impossible to find standard items that no one else seems to be able to find. And the answer is very simple: We were fortunate enough to squirrel away small stocks of most of these items but our supply for some of them is very limited and in this instance "very limited" means like we are down to our last one or two. So quite clearly, any and all of these items are subject to availability and substitution at any time. Should you have any doubts about what you would be getting just let us know and we can confirm precisely what you would be receiving. We will do our best to keep our webpage current so that it does reflect composition of the product if ordered when being viewed.