1,339 Matching Results

Search Results

Advanced search parameters have been applied.

The Crystal Cavities of the New Jersey Zeolite Region

Description: From abstract: The crystal cavities present in the mineral complex of the New Jersey traprock region have long excited the interest of mineralogists. In 1914 Fenner made the first detailed and comprehensive study of these cavities and suggested that babingtonite was the original mineral. Soon after this anhydrite was found occupying parts of some of the cavities at one of the quarries. At this time, too, Wherry concluded that glauberite was the original mineral of some of the cavities because of his studies of similar crystal cavities in Triassic shale at different places.
Date: 1932
Creator: Schaller, Waldemar T.
Partner: UNT Libraries Government Documents Department

Molar Volumes and Densities of Minerals

Description: The following report presents tables critically chosen for the "best values" for the density and molar volume of selected mineral compounds. The intent to the selection was not to be inclusive, but to present data for chemically and physically well-defined phases for which the molar volume and/or density was known to the order of 0.2 percent.
Date: July 1962
Creator: Robie, Richard A. & Bethke, Philip M.
Partner: UNT Libraries Government Documents Department

A Nomogram for Obtaining Percent Composition by Weight From Mineral-Grain Counts

Description: Report describing a nomogram for calculating percent composition from mineral-grain counts. From abstract: "A nomogram for calculating percent composition from mineral-grain counts reduces several of the more tedious arithmetical operations to two mechanical ones."
Date: October 1952
Creator: Berman, Robert
Partner: UNT Libraries Government Documents Department

Studies of Uranium Minerals: The Status of Billietite and Becquerelite

Description: Report describing studies regarding billietite and becquerelite. Tables with optics of the materials, chemical analyses results, cell constants and specific gravities, and interplanar spacings of the materials are included as well as crystallographic forms of billietite
Date: February 1953
Creator: Frondel, Judith W. & Cuttitta, Frank
Partner: UNT Libraries Government Documents Department

Some Natural Variations in the Relative Abundance of Copper Isotopes

Description: Abstract: "The relative isotopic abundance of copper has been measured in a number of minerals. Suites of samples from Michigan and the Colorado Plateau have been examined to determine if local variations due to isotopic exchange or diffusion could be found. The relative isotopic abundance of copper in specimens from a number of other places was also determined. The variations noted were small but in most cases were felt to be significant because they were larger than the experimental error (0.1 percent in the ratio). A total spread of +3 to -8 parts per mil compared to the standard was found in the specimens tested."
Date: August 1957
Creator: Walker, Edward C.; Cuttitta, Frank & Senftle, Frank E.
Partner: UNT Libraries Government Documents Department

A Multiple Cone Splitter for Rapid Sampling in the Laboratory

Description: Report explaining a multiple cone sample splitter, which, in one operation, obtains representative sample fractions of 5-50 percent and increases time efficiency compared to conventional methods of sample splitting. Information regarding the machine's description, operation, and accuracy are given as well as a summary.
Date: October 1953
Creator: Kellagher, Richard
Partner: UNT Libraries Government Documents Department

Map of the Colorado Plateau Showing Deposits and Groups of Deposits that Produced 1,000 Tones or More of Uranium-Vanadium Ore Through December 31, 1953

Description: The following document provides a mineralogical and geological map of the Colorado Plateau providing deposits and groups of deposits that have been found to produce 1,000 tons or more of uranium-vanadium within December 31, 1953.
Date: 1955
Creator: Chew, Randall T., (3d.)
Partner: UNT Libraries Government Documents Department


Description: A study was made of the effect of the addition of V aad Si on the properties of Th; corrosion of stainless steel in uranyl sulfate; corrosion, brazing, and welding of stainless steel; properties of Ti; method of combining deuterium and O for return to the reactor; spot welding of fuel elements; fabrication of reactor fuel elements; mechanical testing of U, Th, and stainless steel; surface rearrangements on a single crystal of Cu in contact with a saturated solution of Cu in Bi; development of cermets for reactor components; fabrication of Th-U fuel elements and Al-U alloy componerts. (J.E.D.)
Date: April 1, 1953
Creator: Bridges, W.H. ed.
Partner: UNT Libraries Government Documents Department

FUNDAMENTALS OF SINTERING--II. Second Annual Progress Report, June 30, 1956 to June 30, 1957

Description: Rates of spheroidization and densification of gold and of nickel wire compacts were measured as a function of time, temperature, and wire size. The necks joining the sintered particles were found to grow proportionally to the one- fifth root of time. The value of the coefficient of self-difiusion calculated from the sintering rate is of the sane order of magnitude as that obtained by ordinary tracer techniques but with a somewhat higher activation energy. These results are entirely consistent with those predicted by the Kuczyrski diffusional theory of sintering, as is the effect of wire size on sintering rate. The experiments did not reveal a clear effect of grain boundaries on sintering rates. This may be due to a relatively slow densification of the nickel wire compacts at even 0.98 of the absolute melting point, which obscured the effect of grain growth on sintering rate. (auth)
Date: February 15, 1958
Creator: Pranatis, A.L.; Castleman, L.S. & Seigle, L.
Partner: UNT Libraries Government Documents Department


Description: The first group of Pu--Al MTR fuel elements fubricated were rejected for excessive dimensions and blistering. The fuel element constitution and fubrication was reviewed, and a new Pu--Al ratio and revised rolling techniques were suggested. (D.E.B.)
Date: August 1, 1956
Creator: Beaver, R.J.
Partner: UNT Libraries Government Documents Department


Description: >Progress is reported in the extrusion of Cu-clad Zr billets into tubing, welding of Zr strip into tubing using a roder resistance welding tube mill, piercing of Zr billets into a base tube, the casting and fabrication of U-- Nb alloys, the rolling of Zircaloy sheet, the roll-cladding of Zircaloy to U--Nb alloys, the fabrication of plate type reactor fuel elements of U--Hb alloys roll bonded with Zircaloy, fabrication of a complete U/sup 235/--Zr fuel slug for the EBR, the fabrication of U-- Zr alloy rod into EBR fuel blanket slugs, the thermal cycling of U-- Zr rods following heat treatment, the fubrication of enriched U reactor fuses, the preparation and dimensional stability of U single crystals, twinning in U crystals, diffusion in Cu- U couples, the fabrication of U billets from electrolytic crystals, the preparation of U-- Zr and Hb--U alloys, effects of radiation on U, the effects of radiation on U-- Zr alloys, the corrosion of Al, Zr, and Nb-U alloys, and the effects of heat treatments on Hb-- U alloys. (C.H.)
Date: September 30, 1953
Partner: UNT Libraries Government Documents Department

Uranium in Peru

Description: Introduction: From the inception of the effort to utilize atomic energy PerĂº has been of interest as a possible source of radioactive raw materials because of its great variety and abundance of metals. Because of this and a desire at that time to develop additional supplies of uranium, a cooperative program to search for uranium deposits was initiated in 1953 by the Junta and the USAEC.
Date: January 1, 1962
Creator: Gabelman, John W. & Beard, Raymond R.
Partner: UNT Libraries Government Documents Department

Limnological and Geochemical Survey of Williams Lake Hubbard County, Minnesota

Description: Purpose and scope: The purpose of this report is to describe and make preliminary interpretations of: (1) Limnological characteristics of Williams Lake, based on physical, chemical, and biological data collected in 6 days in 6 different months in 1979; (2) chemical quality of ground water near the lake, based on samples collected during the summer of 1979; and (3) mineralogy of the lake sediment cores obtained in February 1978. The period of study extended from March, when the lake was covered by ice, through the period of open water, to December, when it was again covered by ice.
Date: September 1981
Creator: LaBaugh, J. W.; Groschen, G. E. & Winter, T. C.
Partner: UNT Libraries Government Documents Department