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Libby amphibole tremolite

WebThe form of asbestos in Libby’s contaminated vermiculite has been characterized as belonging to the amphibole (double-chain silicate) mineral group, including both regulated (tremolite) and unregulated (primarily winchite and richterite) fibers (Meeker et al., 2003). These various fibers within Libby amphibole asbestos differ in their ... WebMicroprobe characterization of the material from Libby, MT, indicates the mineral has an average percent composition of 56.8 SiO 2, 1.9 FeO, ... Actinolite is an Al-poor amphibole; it contains mainly tremolite. Actinolite is green in hand specimen and colourless to pale green under the microscope. Plagioclase is pure albite and contains no Ca.

Case‐fatality study of workers and residents with …

WebLibby, Montana by the author (MEG) in October 1999. The UI tremolite sample was selected to represent a non-fibrous amphibole and to obtain data on cleav-age fragments. The NIST tremolite was selected for a comparison to the Libby amphiboles. In general, tremolite samples were selected because the amphib-oles from Libby had been … WebWylie A G, Verkouteren J R (2000) Amphibole asbestos from Libby, Montana: Aspects of nomenclature, American Mineralogist, 85, 1540-1542 Zaitsev A N, Chakhmouradian A R (2002) Calcite – amphibole – clinopyroxene rock from the Afrikanda Complex, Kola Peninsula, Russia: mineralogy and a possible link to carbonatites. II. ghost of the coast https://concasimmobiliare.com

Vermiculite and Libby - Lincoln County Asbestos Resource Program

Web01. nov 2024. · Fibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4 ± 0.7. C57BL/6 mice were exposed by oropharyngeal aspiration to fiber suspensions at a very low dose of 3 μg/mouse. WebThe composition of the Libby amphiboles indicated the presence of both regulated (tremolite) and unregulated (primarily winchite and richterite) fibers , with the majority of the samples displaying morphologies between prismatic crystals and asbestiform fibers. These various fibers within Libby amphibole amphibole differ in their relative... WebAbstract. The physical properties of different types of asbestos may strongly affect health outcomes in exposed individuals. This study was designed to provide understanding of the comparative toxicity of naturally occurring asbestos (NOA) fibers including Libby amphibole (LA), Sumas Mountain chrysotile (SM), El Dorado tremolite (ED), and Ontario … frontline inchicore

The Composition of Amphiboles from the Rainy Creek Complex

Category:Tremolite mineral Britannica

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Libby amphibole tremolite

Types of Asbestos That Can Cause Asbestos Diseases ACC

WebPowder and Valiant Shower to Shower Talc Products for Amphibole (Tremolite) Asbestos Expert Report. Several aspects are of note. First, the frequencies are low but uniform over a wide range of widths. ... Like Italian fluoro-edenite and Libby winchite-richterite asbestos, the first mode is at 0.33 and the second is at about 0.6 μm. WebHowever, the vermiculite ore taken from a mining operation in Libby, Montana, was contaminated with asbestos amphibole minerals, including tremolite and actinolite. ...

Libby amphibole tremolite

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Web06. maj 2024. · The Environmental Protection Translation (EPA) is proposing reporting and recordkeeping requirements with absorption under the Poisons Substances Control Act (TSCA). EPA proposes to require certain persons that manufactured (including imported) or processed asbestos and asbestos-containing articles... Webamphibole. The asbestiform amphibole at Libby has been referred to under a variety of names, including tremolite, actinolite, soda tremolite, richterite, and winchite. The current nomenclature used in the popular press and by the residents of Libby is tremo-lite, or tremolite/actinolite. Deer et al. (1963) give an analysis

http://www.minsocam.org/MSA/AmMin/TOC/Abstracts/2000_Abstracts/Oct00_abstracts/Wylie_p1540_00.pdf WebPhysical properties. Long prismatic, acicular, or fibrous crystal habit, Mohs hardness between 5 and 6, and two directions of cleavage intersecting at approximately 56° and 124° generally suffice to identify amphiboles in hand specimens. The specific gravity values of amphiboles range from about 2.9 to 3.6. Amphiboles yield water when heated in a closed …

WebLibby Amphibole asbestos is in the tremolite subgroup and historically has been reported as a sodium-rich tremolite (Larsen, 1942; Boettcher, 1966; Leake, 1978). However, a more exact analysis of Libby Amphibole asbestos, characterizing the cation composition of individual fibers to better define the amphiboles present, indicates winchite and ... WebBackground: Fibrous tremolite is a widespread amphibole asbestiform mineral, airborne fibres of which constitute an environmental hazard in Libby, Montana, northern …

WebAlthough many studies showed adverse effects following exposure to Libby amphibole (LA; a mixture of winchite, richterite, and tremolite), little is known regarding the relative …

WebName: Tremolite RRUFF ID: R060311 Ideal Chemistry: Ca 2 (Mg 5.0-4.5 Fe 2+ 0.0-0.5)Si 8 O 22 (OH) 2 Locality: Khyber Pass area, Khyber Agency, North-West Frontier Province, Pakistan Source: Herb Obodda 005 Owner: RRUFF Description: Colorless fragment Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical … ghost of the doll fashion star filliesWebTremolite Asbestos. By now many people are familiar with the story of the W.R. Grace vermiculite mine in Libby, Montana. Grace owned and operated the mine from 1960 to 1993, mining an ore that is heated, crushed and then used for insulation products. The vermiculite in the Libby mine is contaminated with tremolite asbestos. frontline indianaWebBackground: Fibrous tremolite is a widespread amphibole asbestiform mineral, airborne fibres of which constitute an environmental hazard in Libby, Montana, northern California, and elsewhere. Aims: To determine excess risk from lung cancer, mesothelioma, and all-cause mortality in a cohort of men exposed to tremolite, but no other form of asbestos. ghost of the doll sea weesWeb17. mar 2024. · Between 1925 and 1990, vermiculite was mined near Libby, Montana. This mine accounted for more than 50% of vermiculite production worldwide. However, the mine was contaminated with tremolite asbestos and asbestos-like fibers. Concerns for workers and residents in Libby arose and the EPA became involved with cleanup in the area. ghost of the darkWeb01. okt 2008. · Libby, Montana is the site of a large vermiculite deposit that was mined between 1920 and 1990 to extract vermiculite for commercial applications such as … ghost of the doll ukWebFibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4 ± 0.7. C57BL/6 mice ... frontline incorporatedWebseveral specific minerals of interest, including Libby amphibole, edenite, ferroactinolite, anthophyllite, tremolite, winchite, richterite, and erionite (U.S. EPA, 2006). Asbestos is a generic commercial term describing several silicate minerals where crystalline growth produces very long, thin, flexible, separable fibers. ghost of the doll keypers