Libby amphibole tremolite

Author: mwgj

August undefined, 2024

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... Web22. mar 2024. · Amphibole asbestos has needle-shaped fibers. Studies suggest it takes much less exposure to amphibole asbestos to cause cancer, compared to serpentine asbestos. Amosite and crocidolite are the most commercially valuable types of amphibole asbestos, while anthophyllite, tremolite and actinolite are considered noncommercial forms.

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WebPurpose of review: The vermiculite ore formerly mined in Libby, Montana, contains asbestiform amphibole fibers of winchite, richterite, and tremolite asbestos. Because of … WebTremolite is a member of the amphibole group of silicate minerals with composition: Ca 2 (Mg 5.0-4.5 Fe 2+ 0.0-0.5)Si 8 O 22 (OH) 2.Tremolite forms by metamorphism of sediments rich in dolomite and … baneca

Fate of Libby Amphibole Fibers When Burning Contaminated …

WebThe amphiboles from the Vermiculite Mountain vermiculite deposit, primarily winchite and richterite, are related to tremolite and in the past have been referred to as sodium-rich … Web01. okt 2000. · Changing amphibole nomenclature, uncertainties in Fe +2 /Fe +3, and natural compositional variability result in samples of the asbestiform amphibole from … WebTesting Status of Libby Amphibole 2007 09075; Testing Status of Libby Amphibole 2007 09075 . CASRN: LA2007 Related: Tremolite, Edenite, Richterite, and Winchite Short-Term Toxicity. 7 months (Inhalation) (C09075) On Test . Rats: Harlan Sprague-Dawley; Dose: 0, 0.1, 0.3, 1, 3, 10 mg/m3; n=35 males/exposure concentration or n=50 females/exposure ... bane breaks batman back

Exposure to airborne amphibole structures and health risks: Libby …

Amphibole - Wikipedia

Web27. dec 2024. · Tremolite was the only regulated asbestos fiber found in the raw vermiculite ore, 2 but in 2003, Meeker et al. determined that the Libby amphibole (LA) was composed of toxic nonregulated amphibole fibers, including winchite (84%), and richterite (11%), in addition to tremolite (6%). 3 Several occupations in the Libby area have been … Webexposed to Libby amphibole should be monitored for this outcome. L ibby, Montana was the site of a vermiculite mining and process-ing operation from the 1920s to 1990. ... have been collectively called tremolite by the community, popular press, and in some scientiﬁc literature1 but Libby vermiculite also contains actinolite2 and unregulated ... bane bu sianeWeb15. feb 2012. · The amphiboles from the Vermiculite Mountain vermiculite deposit, primarily winchite and richterite, are related to tremolite and in the past have been referred to as … aruba tan and spa

"WebOther articles where tremolite is discussed: amphibole: Chemical composition: Complete substitution extends from tremolite [Ca2Mg5Si8O22(OH)2] to ferro-actinolite [Ca2Fe5Si8O22(OH)2]. Actinolite is the intermediate member of the tremolite-ferro-actinolite series. The compositional range from about 0.9 Mg7Si8O22(OH)2 to about Fe2 " - Libby amphibole tremolite

Libby amphibole tremolite

Amphibole - Physical properties Britannica

Web21. dec 2024. · Osha believes that as a whole the animal experiments conducted confirm that for clearly differentiated dust populations, qualitative differences in ... WebBackground: 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.

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http://www.minsocam.org/MSA/AmMin/TOC/Abstracts/2000_Abstracts/Oct00_abstracts/Wylie_p1540_00.pdf Web01. apr 2007. · BackgroundVermiculite from the mine near Libby, Montana, is contaminated with tremolite asbestos and other amphibole fibers (winchite and richterite). Asbestos …

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 … 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 …

http://www.asbestosnews.com/asbestos/tremolite/ Webal. 1997). Previously, the amphibole from Vermiculite Moun-tain had been called soda tremolite (Larsen 1942), richterite (Deer et al. 1963), soda-rich tremolite (Boettcher 1966b), and tremolite asbestos and richterite asbestos (Langer et al. 1991; * E-mail: [email protected] Nolan et al. 1991).

Web01. apr 2007. · BackgroundVermiculite from the mine near Libby, Montana, is contaminated with tremolite asbestos and other amphibole fibers (winchite and richterite). Asbestos-contaminated Libby vermiculite was used in loose-fill attic insulation that remains in millions of homes in the United States, Canada, and other countries.ObjectiveThis report …

aruba temperature in januaryWebWho Is CARD. In the northwest corner of Montana, in the rural community of Libby, the Center for Asbestos Related Diseases (CARD) has emerged as a national center of excellence in addressing healthcare issues associated with Libby amphibole (previously called tremolite) asbestos. The CARD is a non-profit 501 (c) 3 governed by a volunteer ... aruba tekeningWebThe presence of the blue sodium-rich amphibole glaucophane defines rocks of ... Though these amphiboles have historically been referred to as tremolite (or soda ... 2003; Meeker, 2003). Microprobe characterization of the material from Libby, MT, indicates the mineral has an average percent composition of 56.8 SiO 2, 1.9 FeO, 4.5 Fe 2 O 3 ... aruba tanning mdWeb01. 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. banecare managementWebPowder 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. aruba tariq instagramWeb27. dec 2024. · Tremolite was the only regulated asbestos fiber found in the raw vermiculite ore, 2 but in 2003, Meeker et al. determined that the Libby amphibole (LA) was … aruba tamarind hotelWebThe 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 ... aruba task manager