Investigations on SYNROC mineralogy. Progress report Metadata

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  • Main Title Investigations on SYNROC mineralogy. Progress report


  • Author: Ringwood, A.E.
    Creator Type: Personal


  • Name: Lawrence Livermore National Laboratory
    Place of Publication: [Livermore,] California


  • Creation: 1982-01-21


  • English


  • Content Description: Progress reports are presented for the following projects: (1) factors influencing the leaching performance of hollandiate; (2) incorporation of uranium and rare earths into zirconolite; (3) reconnaissance studies of the stability relations of Ca-Ti-Al phases in SYNROC C formulations; (4) immobilization of highly aluminous sludges; (5) SYNROC D formulations produced by sintering in air; (6) crystallization behavior of interstitial glass in SYNROC D formulations. Some of the highlights are: (1) leaching performance of all hollandites irrespective of preparation technique, can be improved by hot-pressing under specific controlled redox conditions, below Ni-NiO; (2) there is no satisfactory crystal-chemical reason why the leaching performance of Ti/sup 3 +/-bearing hollandite should be superior to that of Al/sup 3 +/ hollandite; (3) experiments have shown that the zirconolite lattice can accept up to 30% rare earths (Sm/sub 2/O/sub 3/) before becoming destabilized in favor of pyrochlore or a related f.c.c. structure; (4) SYNROC zirconolites will therefore be well below their saturation limits in rare earths and trivalent actinides; (5) experiments have established that the Ca-Ti-Al phase (CTA) is compatible with perovskite, hollandite and zirconolite; (6) magnetoplumbite-type phases coexists with hollandite, perovskite, zirconolite and Fe-bearing pseudobrookite, but do not coexist with the CTA phase CaTi/sub 3/Al/sub 8/O/sub 19/; (7) experiments demonstrated that it is not possible to convert highly aluminous sludges to a waste form comprising zirconolite, perovskite, spinel and nepheline plus corundum, by adding appropriate minimum amounts of the inert SYNROC additives (CaO, TiO/sub 2/, ZrO/sub 2/, SiO/sub 2/); (8) sintering of SYNROC D in air at temperatures just above the solidus (1200 to 1250/sup 0/C) produced a dense compact ceramic, but the optimum SYNROC-D mineralogy was not produced. (ATT)
  • Physical Description: Pages: 97


  • Keyword: Research Programs
  • Keyword: Synthetic Materials
  • Keyword: Titanium Compounds
  • Keyword: Rocks
  • STI Subject Categories: 36 Materials Science
  • Keyword: Oxides
  • Keyword: Glass
  • Keyword: Zirconolite
  • Keyword: Waste Processing
  • Keyword: Minerals
  • Keyword: Data
  • Keyword: Chalcogenides
  • Keyword: Zirconium Compounds
  • Keyword: Transition Element Compounds
  • Keyword: Separation Processes
  • Keyword: Synthetic Rocks
  • Keyword: Phase Studies
  • Keyword: Materials
  • STI Subject Categories: 360602 -- Other Materials-- Structure & Phase Studies
  • STI Subject Categories: 360604 -- Materials-- Corrosion, Erosion, & Degradation
  • STI Subject Categories: 12 Management Of Radioactive And Non-Radioactive Wastes From Nuclear Facilities
  • Keyword: Calcium Compounds
  • Keyword: Processing
  • Keyword: Aluminium Oxides
  • Keyword: Mineralogy
  • Keyword: Perovskites
  • Keyword: Alkaline Earth Metal Compounds
  • Keyword: Dissolution
  • Keyword: Barium Oxides
  • Keyword: Barium Compounds
  • Keyword: Experimental Data
  • Keyword: Aluminium Compounds
  • Keyword: Numerical Data
  • Keyword: Titanium Oxides
  • Keyword: Oxygen Compounds
  • Keyword: Leaching
  • Keyword: Management
  • Keyword: Perovskite
  • Keyword: Hollandite
  • Keyword: Information
  • Keyword: Calcium Oxides
  • Keyword: Radioactive Waste Processing
  • Keyword: Waste Management
  • Keyword: Oxide Minerals
  • Keyword: Synroc Process
  • STI Subject Categories: 360601 -- Other Materials-- Preparation & Manufacture
  • Keyword: Synthesis
  • Keyword: Zirconium Oxides 052001* -- Nuclear Fuels-- Waste Processing


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


  • Other: DE82011072
  • Report No.: UCRL-15436
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/5516706
  • Office of Scientific & Technical Information Report Number: 5516706
  • Archival Resource Key: ark:/67531/metadc1091870


  • Display Note: NTIS, PC A05/MF A01.