Beryllium

“ This is now treated for some days with a hot concentrated solution of ammonium carbonate, which precipitates the iron and aluminium but keeps the beryllium in solution. The iron and aluminium precipitates are filtered off, and the filtrate boiled, when a basic beryllium hydroxide containing a little ferric oxide is precipitated. To remove the iron, the precipitate is again dissolved in ammonium carbonate and steam is blown through the liquid, when beryllium oxide is precipitated. ”

“ Prepare a calibration graph of fluorescence intensity vs. beryllium concentration (ng/mL) in the stock standard. NOTE:
To test a range of 0.05 μg to 4 μg of beryllium on the sampling media, beryllium stock standard solutions are made up using beryllium spectrometric standards diluted with the ammonium bifluoride dissolution solution. A recommended series of stock standard solutions is (800, 200, 40, 10, and 0) ng/mL. As with the samples, the stock standards are prepared for analysis by adding 0.1 mL of beryllium stock standard into 1.9 mL of detection solution (20-fold dilution) . ”

“ The aquamarine and golden beryl too belong to this same species. Beryl is a silicate of aluminum and beryllium. That is, it is a compound in which oxide of silicon is united with the oxides of aluminum and of beryllium. There are thus four chemical elements combined in the one substance and it is hence more complicated in its composition than any of the gems that we have yet considered. It is worthy of note that aluminum occurs in the majority of precious stones, the only species so far considered that lack it being diamond, and the quartz gems. ”

“ The working range of the method is 0.005 μg/m3 to 6 μg/m3 for an air sample of 1,000 L. The analysis is for total beryllium and is not compound specific. INTERFERENCES: Minor interference from iron can result if iron concentrations are high. Samples high in iron demonstrate a yellow or gold coloration. This interference can be minimized by allowing the solution to sit for at least four hours, during which time the solution clears, and then filtering the sample extract before use. ”

“ Beryl, to use the name by which the species is known to science, is essentially a silicate of aluminium and beryllium corresponding to the formula, Be3Al2 (SiO3) 6. The beryllia is often partially replaced by small amounts of the alkaline earths, caesia, potash, soda, and lithia, varying from about 11⁄2 per cent. in beryl from Mesa Grande to nearly 5 in that from Pala and Madagascar, and over 6, of which 3·6 is caesia, in beryl from Hebron, Maine; also, as usual, chromic and ferric oxides take the place of a little alumina; from 1 to 2 per cent. of water has been found in emerald. ”

“ Well, ordinary polished silver is a mighty poor radiator. Homely example: Try waiting for your coffee to cool if it's in a polished silver pot. Then try it in a tungsten-beryllium pot. No matter how you polish that tungsten-beryllium, the stuff WILL radiate heat. That's why an IP ship is always so blamed cold. You know the passenger ships use [79] polished aluminum outer walls. The big help is, that the tungsten-beryllium will throw off the energy pretty fast, and in a big ship, with a whale of a lot of matter to heat, the Strangers will simply give up the idea. ”

“ No—just luck—and the fact that they're light, strong as steel almost, and can be manufactured in forms much more quickly. Only the outer hull is tungsten-beryllium. The advantage in this will be that nearly all the energy will be absorbed outside, and we'll radiate pretty fast, particularly as that tungsten-beryllium has a high radiation-factor in the long heat range. ”

“ Professor Reuter's oily voice boomed out. "I regret to say that although this metal responds to the spectroscopic tests for beryllium, it will not do for our purpose. It is, in fact, an isotope of beryllium, a metal which resembles it spectroscopically but not physically. The weight is wrong; the metal is much too heavy and will not do for making armor for space ships."
"But—but—" babbled Adam. ”

“ And boron is such a one; its atomic weight is 11, and its compounds are expressed by BX3. Lithium and beryllium are metals; carbon has no metallic properties; boron appears in a free state in several forms which are intermediate between the metals and non-metals. Lithium gives an energetic caustic oxide, beryllium forms a very feeble base; hence one would expect to find that the oxide of boron, B2O3, has still more feeble basic properties and some acid properties, all the more as CO2 and N2O5, which follow after B2O3 in their composition and in the periodic system, are acid oxides. ”

“ In examining a large number of minerals for helium, Strutt [136] found that some samples of beryl, a beryllium aluminium silicate, contain a relatively very large amount of helium, but only traces of thorium, and was altogether [103] inactive. The absence of any active constituent renders untenable the ordinary explanations of the presence of such a surprising quantity of helium. Boltwood has put forward a suggestion which in the present state of our knowledge must be regarded as a provisional explanation. ”

“ Validation of a standardized portable fluoresence method for determining trace beryllium in workplace air and wipe samples. J Environ Monit 2006 (8) : 619- 624. [2]
Ashley K, Agrawal A, Cronin J, Tonazzi J, McCleskey TM, Burrell AK, Ehler DS [2007] . Ultra-trace determination pf beryllium in occupational hygiene samples by ammonium bifluoride extraction and fluorescence detection using hydroxybenzoquinoline sulfonate. Analytica Chimica Acta 584 (2007) : 281-286. ”

“ The funnels generally, but not always, radiate from a central globe. We give beryllium (glucinum) as the simplest example (2 on Plate III) , and to this group belong calcium and strontium. The tetrahedron is the form of chromium and molybdenum, but not that of the head of their group, oxygen, which is, like hydrogen, sui generis. These two groups are marked in orthodox chemistry as respectively positive and negative, and are closely allied. Another pair of groups show the same tetrahedral form: magnesium, zinc and cadmium, positive; sulphur, selenium and tellurium, negative. ”

“ Caltech, where people think the troubles of the world began. The peeling eucalyptus trees and the long shadows on the long sidewalk. Way back in the dear, dead beryllium days—"
"I haven't the faintest idea what you mean!"
"Dr. Einstein," I said, "walking around under his hair. Thinking so hard he never noticed the earthquake. It was the spring of nineteen-thirty-three. Perhaps I should explain that, in those days, when they wanted to split an atom, they generally used beryllium. A common element—half as heavy as aluminum and twice as strong—but difficult to recover. Poor Dr. E! ”

“ Rotator may also be substituted by a shaker or an agitator as long as the dissolution solution wets the wipe well. Sonication has also been shown to be effective. For dissolution of refractory materials such as high-fired beryllium oxide, agitation of the dissolution solution with the media must be replaced by heating to 80 °C for 30 minutes. Any standard dissolution process is particle-size dependent. ”

“ Beryllium offers us four similar funnels and a central globe, and the proto-elements consist of these five bodies, set free. The funnel, released from pressure, assumes a spherical form, with its four ovoids spinning within it, and the central globe remains a sphere, containing a whirling cross. On the meta level, the ovoids are set free, and two from each funnel are seen to be positive, two negative—sixteen bodies in all, plus the cross, in which the resultant force-lines are changed, preparatory to its breaking into two duads on the hyper level. ”

“ The sulphate is obtained by dissolving the oxide in sulphuric acid; if the solution be not acid, it separates in pyramidal crystals of composition BeSO4·4H2O, while from an acid solution of this salt, crystals of composition BeSO4·7H2O are obtained. Double sulphates of beryllium and the alkali metals are known, e.g. BeSO4·K2SO4·3H2O as are also many basic sulphates. The nitrate Be (NO3) 2·3H2O is prepared by adding barium nitrate to beryllium sulphate solution; it crystallizes with difficulty and is very deliquescent. It readily yields basic salts. ”

“ Nevertheless, the writer still suspected some of the rare earths. [163]
Sestini [164] had found that if certain plants were nourished with a solution of a beryllium salt, in the ash of these plants could be shown the presence of beryllium. ”

“ Nuclear-grade beryllium oxide.
Refractory bricks of nuclear-grade beryllium oxide. Other refractory products of nuclear-grade beryllium oxide.
Artificial graphite in the form of blocks or bars in which the boron content is less than or equal to one part per million and in which the total microscopic thermal neutron absorption cross-section is less than or equal to 5 millibarns.
Artificially separated stable isotopes.
Electromagnetic ion separators, including mass spectrographs and mass spectrometers.
Reactor simulators (special analog computers) . ”

“ If alternative ratios of dissolution solution and detection solution are used for sample preparation, then a similar ratio for calibration is required. 10.
Analyze a stock standard, a reagent blank, and a media blank at least once every 20 samples. Ensure that the concentration range of the stock standards spans the beryllium levels found in the samples. 11. ”

“ The R and R and RCS section surfaces are made up of unbeaded shingles of beryllium. The shingles protect the re-entry module structure from excessive heat and provide additional rigidity for the cabin. The shingles are black on the outer surface to control thermal radiation. The inner surface of the beryllium shingles are coated with gold to provide a low emissivity surface.
ADAPTER The adapter functions to mate the spacecraft to the launch vehicle, to provide for mounting equipment and retrograde rockets , and to serve as a radiator for the spacecraft coolant system. ”

“ In chrysoberyl, however, the beryllium exists as an aluminate, having the formula BeAl2O4, or BeO·Al2O3. The analysis of a specimen of Brazilian chrysoberyl gave alumina 78·10, beryllia 17·94, and ferric oxide 4·88%. The typical yellow colour of the stone inclines in many cases to pale green, occasionally passing into shades of dark green and brown. The iron usually present in the mineral seems responsible for the green colour. Chrysoberyl is often mistaken by its colour for chrysolite (q.v.) ”

“ We left the ship at about five in the morning, and spent most of the day climbing up to the spot where we had detected the beryllium. We couldn't get a sample; the main deposit is located several feet beneath the surface of the mountaintop, and the mountain is too rough and rocky to climb without special equipment. ”

“ As in the first group lithium is followed by sodium, giving a more basic oxide, so in the second group beryllium is followed by magnesium, and so also in the third group there is, besides the lightest element, boron, whose basic character is scarcely defined, aluminium, Al = 27, whose oxide, alumina, has somewhat distinct basic properties, which, although not so powerful as in magnesium oxide, are more distinct than in boric anhydride. Among the elements of the third group, aluminium is the most widely distributed in nature ”

“ The Isolation of Elements.—In the year 1818 about 53 elements were recognized, and since that time about 30 more have been discovered, but the elements already known comprised the more common ones, and nearly all of those which have been commercially important. A few of them, including beryllium, aluminium, silicon, magnesium, and fluorine, were then known only in their compounds, as they had not yet been isolated in the free condition.
Berzelius in 1823 prepared silicon, a non-metallic element resembling carbon in many respects. ”

“ Wear appropriate personal protection during sampling activities and analysis. It is essential that suitable gloves, eye protection, laboratory coat, etc., be used when working with the chemicals. Perform sample preparation and analysis in a clean, well-ventilated area that is well removed from any possible beryllium contamination. Any area affected by the dissolution or detection solutions must be immediately washed with plenty of water. Ammonium bifluoride will etch glass, so it is essential that all ammonium bifluoride solutions be contained in plastic labware. ”

“ Kendall turned over a small rheostat control—and abruptly the eighteen-inch diameter spot on the tungsten-beryllium plate began contracting; it contracted till it was a blazing, sparkling spot of molten incandescence less than an inch across!
"That's the advantage of focus. At this distance of a few hundred feet with a small beam I can do that. With a twenty-foot beam, I can get a two-foot spot at a distance of nearly ten miles! That means that the receiving end will have the pleasure of handling one hundred times the energy concentration. That would punch a hole through most anything. ”

“ Read absorbance of samples, A; average media blanks, A b; average sulfate reagent blanks, A r; and working standards, A s. Using the working standard, C s (μg/mL) , analyzed adjacent to the sample of interest, calculate concentration, C (μg/m 3) , of Be in the air volume sampled, V (L) :
EVALUATION OF METHOD: This method was evaluated using NTIS Standard Reference Material No. 2675 for Be over the range of 0.1 to 0.4 μg Be/filter (equivalent to one-half to two times the OSHA PEL) . Beryllium recovery was 98.2% with a measurement precision, Sr, of 0.008 [2] . ”