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SME Georgia Section Meeting - Gary Tomaino - Krumb Lecturer - 25 August 2016

  • 1.  SME Georgia Section Meeting - Gary Tomaino - Krumb Lecturer - 25 August 2016

    Posted 08-05-2016 04:52 PM

    Dear Mining Industry Professionals,

    Please make plans to attend the SME Georgia Section meeting scheduled for Thursday, August 25, 2016 at 6:00 PM in Milledgeville at Georgia College & State University.  Our guest speaker is Gary P. Tomaino with Minerals Technologies, Inc.  Dr. Tomaino is an SME Henry Krumb Lecturer.  His topic is “Discriminating Opaline Phases from Cristobalite and Tridymite in Clays” (Please see the abstract below and the attached meeting notice).  This meeting will be of interest to mineralogists, crystallographers, mine planners, EHS professionals and anyone with concerns about crystalline silica (respirable quartz) in your mines, facilities and in your products..   

    Dr. Sal Romero, Senior Geotechnical Engineer with Golder Associates will also give an environmental update.  If you have questions that you would like to see addressed please let me know.

    Sponsor for this meeting is Golder Associates.  The reception begins at 6:00 PM.

    We will wrap up the evening with a prize drawing.

    I hope to see you there!

    Tom Hilderbrand

    SME Georgia Section Chair

    "Discriminating Opaline Phases from Cristobalite and Trdymite in Clays

    Abstract: This talk centers on continued characterizations and evaluations to discriminate an opaline phase from that of regulated cristobalite and tridymite phases and when these opaline phases are within clay matrices. Present regulations consider crystalline silica (quartz, cristobalite, tridymite) as “known human carcinogen”. Opal-A, a silica hydrate, has a radial distribution pattern resembling the X-ray diffraction pattern of cristsobalite where analysts and regulators misinterpret opal-A as cristobalite. Additional misinterpretations arise with the opaline states, opal-CT and opal-C. Historically, Jones and Signet proposed that opal-CT and opal-C had progressively greater crystallinity attributed to cristobalite and tridymite. However, these historical and continued present day categorizations of this given crystalline state may have overstated the inherent crystallinity of these opaline structures. To confirm a crystalline state of cristobalite or tridymite versus that of opal-A, opal-CT, and opal-C, a combination of known NIST reference materials (1878a quartz and 1879a cristobalite) are used as internal standards to observe alpha to beta and beta to alpha transition states using Thermal-XRD and TGA-DSC.

    About the Speaker: Gary Tomaino has 36 years in natural and synthetic minerals and materials characterizations, degrees in geology, chemistry, and biology, patents in synthesis of silicates making and composition thereof, publications in mineral characterizations, and responsibilities of problem solving in all aspects of Minerals Technologies Inc. business segments including pure and applied R&D, Technical Service, Sales/Marketing, Technology Group, QA/QC, mine plan development, mineralogy and regulatory analyses (crystalline silica, asbestos) for raw, in-process, and finished goods. Analytical expertise in: XRD, Thermal-XRD, and simultaneous Thermal Analysis (TGA-DTA, TGA-DSC), sample preparations/selective dissolutions, sampling and sub-sampling, milling/ grinding, and the utilization of data evaluations from PLM, SEM, FESEM or TEM analyses in the determination for asbestos..

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    Thomas Hilderbrand
    Manager Process Engineering
    Thiele Kaolin Co
    Sandersville GA United States
    (478) 552-3951 EXT 1237
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    Thomas Hilderbrand
    Manager Process Engineering
    Thiele Kaolin Co
    Sandersville GA United States
    (478) 552-3951 EXT 1237
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