Bureau of Mines / Minerals yearbook: Metals and minerals 1977
Year 1977, Volume 1 (1977)
Beryllium, pp. 183-186 PDF (360.8 KB)
186 MINERALS YEARBOOK, 1977 Table 4.—Beryl: World production, by country (Short tons) Country' 1975 1976 1977" Ailgoine Argentina Brazile 35 303 ' ~77O (2) 123 500 —— e110 470 Madagascar 17 19 e15 Mozambique r9 e10 e10 Portugal Rhodesia, Southerne Rwanda r23 70 20 70 "TO 70 e50 South Africa, Republic of Ugandae u.s.s.R.e United States r3 60 1,760 W 60 1,820 W e~ 50 1,870 W Zambiae Total 220 r3,~ 2,675 2,656 eEstimate "Preliminary. rRevised. W Withheld to avoid disclosing individual company confidential data. ' In addition to the countries listed, Bolivia and the Territory of South-West Africa (Namibia) may also have produced beryl, but available information is inadequate to formulate reliableestimates of output levels. 2Revised tozero. TECHNOLOGY Studies relating to the formation of beryllium deposits in western Utah have been reviewed to develop favorable indicators of the presence of epithermal beryllium and associated deposits.2 A method was devised for manufacturing a thin-walled beryllium metal structure. The process required beryllium powder that was mixed with a minor quantity of silicon powder. The mix was plasma-sprayed on to a substrate, removed, exposed to a wet atmosphere to pick up moisture, placed in a sizing die with a coefficient of expansion similar to that of beryllium, out-gassed in a vacuum at high temperature, and fmally sintered in an inert atmosphere.3 A method to measure beryllium concen trations in particulate matter using chelation gas chromatography was developed. This technique was used to observe beryllium levels in suspended particulate matter in ambient air conditions over rural, suburban, and industrial environments. A description of experimental data and techniques was presented.~ ' Physical scientist, Division of Nonferrous Metals. 2Lindsey, D. A. Epithermal Beryllium Deposits in Water-Laid Tuft; Western Utah. Econ. Geol, v. 7Z 1977, pp. 219-232. 3Hovis, V. M. Jr., and W. G. Northcutt, Jr. (assiçied to the US. Energy Research and Development Admuiistration). Method for Fabricating Beryffium Structures. US. Pat. 4,011,076, Mar. 8, 1977. 4Ross, W. D., J. L Pyle, and R. E. Sievers. Analysis for Beryllium in Ambient Air Particulates by Gas Chromatography. Environmental Sd. & TechnoL. v. 11, No.5, May 1977, pp. 467-471.
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