Subtask 1.1 - Characterization of Erionite

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Zeolites are an economical mineral used in several applications, primarily as molecular sieves because of their crystalline structure. Southwestern North Dakota has several localities of volcanic ash deposits (tuffs) that have undergone physical and chemical changes forming some zeolites in the process. Of particular interest is the zeolite mineral erionite, but not because of its economic potential. Erionite is highly carcinogenic and was found to be responsible for extremely high mortality rates in two Turkish villages in close proximity to erionite rock and dust. Erionite has traditionally been identified using x-ray diffraction (XRD) methods. The presence of swelling clays can ... continued below

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Eylands, Kurt; Azenkeng, Alexander; Mibeck, Blaise & Raymond, Laura November 30, 2009.

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Description

Zeolites are an economical mineral used in several applications, primarily as molecular sieves because of their crystalline structure. Southwestern North Dakota has several localities of volcanic ash deposits (tuffs) that have undergone physical and chemical changes forming some zeolites in the process. Of particular interest is the zeolite mineral erionite, but not because of its economic potential. Erionite is highly carcinogenic and was found to be responsible for extremely high mortality rates in two Turkish villages in close proximity to erionite rock and dust. Erionite has traditionally been identified using x-ray diffraction (XRD) methods. The presence of swelling clays can interfere with the identification of erionite by XRD giving false positive results. Scanning electron microscopy (SEM) was used to identify the distinctive needlelike form of erionite. In some cases, erionite was identified using SEM techniques where erionite was present, but in quantities that are lower than the lower detection limits. Conversely, erionite was identified by XRD in some instances where the erionite was somewhat masked in a clay matrix. Both XRD and SEM methods should be used to properly identify erionite. Erionite was identified in sandstones and siltstones from buttes in Dunn, Stark, and Slope Counties of North Dakota, but no definitive correlation was noted between these occurrences and health effects that may be attributed to erionite.

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  • Report No.: None
  • Grant Number: FC26-08NT43291
  • DOI: 10.2172/971247 | External Link
  • Office of Scientific & Technical Information Report Number: 971247
  • Archival Resource Key: ark:/67531/metadc933606

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  • November 30, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Feb. 17, 2017, 5:43 p.m.

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Eylands, Kurt; Azenkeng, Alexander; Mibeck, Blaise & Raymond, Laura. Subtask 1.1 - Characterization of Erionite, report, November 30, 2009; [Grand Forks, North Dakota]. (digital.library.unt.edu/ark:/67531/metadc933606/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.