For grain mounts, XRD and microprobe standards, identification of unknown minerals
Check Digit Verification of cas no
The CAS Registry Mumber 1302-59-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,0 and 2 respectively; the second part has 2 digits, 5 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1302-59: (6*1)+(5*3)+(4*0)+(3*2)+(2*5)+(1*9)=46 46 % 10 = 6 So 1302-59-6 is a valid CAS Registry Number.
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Alfa Aesar
(44522) Topaz, naturally occurring mineral, grains, approximately 0.0 6-0.19in
A first study on the radioluminescence (RL) response of topaz synthesized is reported. Using three alternative and different compact reactants separately, i. e., aluminum oxide, aluminum hydroxide and kaolinite, synthesis tests by chemical vapor deposition (CVD) were conducted varying systematic...detailed
Eastern Brazilian Pegmatite Province includes many topaz-bearing pegmatitic bodies. Residual melts from the Fe–K-rich alkaline Medina granite (ca. 500 Ma) formed the Serrinha pegmatite—a system of branched thin pegmatite veins hosted by pink facies of the parent granite. The colourless topaz f...detailed
The colourless natural topaz stones were surface modified to beautiful yellow and green colour after heat treatment with lead oxide (PbO) and chromium oxide (CrO3), respectively. The surface of topaz shows a uniform colouration over the whole structure, which is confirmed by the UV–vis spectros...detailed
The Qiguling topaz rhyolite is present as a dike within the Qitianling biotite granite batholith of the Nanling Range of southern China. Here, the rhyolitic dike, 4.5 m wide and 500 m long, contains enclaves of topaz granite. These rhyolites contain up to 72 wt.% SiO2, have alumina saturation in...detailed
The aim of this work is to design fast neutron irradiation channels for topaz irradiation at Egypt Second Research Reactor (ETRR-2) by shielding the aluminum boxes, used for topaz irradiation, with B4C (boron carbide) or manufacturing the irradiation boxes from aluminum contains boron. This in t...detailed