definition of asbestos amphibole

Types of Asbestos

2021-9-22 · 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.

Types of Asbestos That Can Cause Asbestos Diseases ...

Tremolite asbestos is known for its heat resistant properties and can also be woven into fabric. Like other asbestos in the amphibole family, tremolite has sharp fibers that can easily be inhaled or ingested. Tremolite is no longer mined and is responsible for many cases of …

Types of Asbestos: Serpentine vs. Amphibole

Amphibole Asbestos. The term amphibole asbestos refers to the remaining five types of the mineral, differentiated from chrysotile which falls into the serpentine class. These other five types of asbestos that have been identified and mined commercially include amosite, a trade name name given to brown asbestos that is found in South African mines.

Chapter 6.2 Asbestos

2013-10-10 · Asbestos consumption has levelled off in recent years (1) to about 4 million tonnes (1983) and, because of the relative decline in crocidolite and amosite usage (1) the figure represents essentially chrysotile production (in 1982 only about 5% of the total asbestos produced was in the form of amphibole asbestos (crocidolite and amosite) (2)).

Types of Asbestos | Amhibole | Serpentine | National ...

2021-9-23 · Amphibole – Amphibole class fibres are needle-like in form. The remaining 5 types of asbestos fall into this category, including Crocidolite, Amosite, Tremosite, Anthophyllite and Actinolite. Crocidolite asbestos is the fibrous form of the amphibole …

Asbestos Hearing

Types of Asbestos - Chyrsotile, Actinolite, Tremolite & More

Overview | Asbestos | ATSDR

2016-11-3 · The legal definition of asbestos applies to six fibrous minerals in two general classes: Serpentine class: chrysotile (also known as white asbestos) Amphibole class: amosite (brown asbestos), crocidolite (blue asbestos), anthophyllite, tremolite, and …

The Regulatory and Mineralogical Definitions of Asbestos ...

2010-6-4 · (1989). The Regulatory and Mineralogical Definitions of Asbestos and Their impact on Amphibole Dust Analysis. American Industrial Hygiene Association Journal: Vol. 50, No. 11, pp. 613-622.

Amphibole, but not chrysotile, asbestos induces anti ...

Amphibole is a form of asbestos that consists of long, straight fibers, as opposed to the ''serpentine'', curly form seen in the commercial asbestos, chrysotile. In our mouse model, the mice exposed to amphibole asbestos (tremolite) exhibited immune complex deposition in the kidneys and mild glomerular changes suggestive of lupus nephritis ...

Define: Asbestos | Asbestos Definition

2020-3-30 · Full Definition of Asbestos. Asbestos is a term used to refer to six naturally occurring silicate minerals. All are composed of long and thin fibrous crystals, each fibre is composed of many microscopic ''fibrils'' that can be released into the atmosphere by abrasion and other processes. A mineral that is mined and is then crushed into ...

Amphibole asbestos soil contamination in the USA: A …

2011-3-1 · less than 1 to 49% of the pedons among all states. While amphibole asbestos deposits occur in mafic and ultramafic provinces, soil amphiboles occur evenly distributed across the U.S.A. The majority of the amphiboles found in the soils would likely not meet the mineralogical definition of asbestos (i.e.,

State-of-the-science assessment of non-asbestos …

2012-12-12 · The distinction between amphibole asbestos fibers and non-asbestos amphibole particles has important implications for assessing potential cancer risks associated with exposure to amphibole asbestos or amphibole-containing products. Exposure to amphibole asbestos fibers can pose a cancer risk due to its ability to reside for long periods of time in the deep lung (i.e., biopersistence). In ...

ASBESTOS (CHRYSOTILE, AMOSITE, CROCIDOLITE, …

2018-6-28 · silicate fibres of the serpentine and amphibole series. These include the serpentine mineral chrysotile (also known as ''white asbestos''), and the five amphibole minerals – actinolite, amosite (also known as ''brown asbestos''), anthophyl-lite, crocidolite (also known as ''blue asbestos''), and tremolite (IARC, 1973; USGS, 2001). The

A review of carcinogenicity studies of asbestos and non ...

2008-10-1 · 1.. IntroductionWe will define some basic asbestos terminology to clarify the terms used. The glossary in ''The Health Effects of Mineral Dusts'' produced by The Mineralogical Society of America (Guthrie and Mossman, 1993) has the following definition: "Asbestos is a term applied to asbestiform varieties of serpentine and amphibole, particularly chrysotile, ''crocidolite'', ''amosite ...

Applying Definitions of "Asbestos" to Environmental and ...

Tremolite asbestos and actinolite asbestos are amphibole minerals that contain calcium and form a solid-solution series between the magnesium- and ironrich end members. The iron-rich members of these calcic amphiboles are actinolite and ferro-actinolite. Anthophyllite asbestos contains mainly magnesium with varying amounts of iron in its structure.

Morphological and Optical Characterization of …

2013-11-21 · (see reference 19 for an overview of asbestos terms). The chemical definition of asbestos used by regu-latory agencies for identification includes six mineral species. These minerals are chrysotile, crocidolite, amosite, tremolite, actinolite, and anthophyllite (5, 7, 16). Chrysotile is the asbestos form of serpentine, a sheet silicate.

Importance of Asbestos Awareness Course | Asbestos ...

2018-7-13 · The main two types of asbestos are Serpentine asbestos (Chrysotile) and Amphibole asbestos (Crocidolite, amosite, anthophyllite, tremolite, actinolite) Later, the legislation was introduced in Congress that would have extended the definition of asbestos to include other amphibole minerals such as winchite and richterite.

A review and critique of U.S. EPA''s risk assessments for ...

U.S. Environmental Protection Agency (EPA) recently conducted a risk assessment for exposure to Libby amphibole asbestos that is precedent-setting for two reasons. First, the Agency has not previously conducted a risk assessment for a specific type of asbestos fiber. Second, the risk assessment incl …

Naturally Occurring Asbestos: Potential for Human …

2020-4-18 · minerals that do not meet the regulatory definition of asbestos (Harper, 2008). In addition to the regulated asbestos minerals, many other naturally occurring fibrous minerals are also implicated in causing disease. Examples include the amphibole minerals winchite, magnesioriebeckite, and richterite from studies in Libby, MT

Amphiboles

2021-1-23 · It stands for asbestos mines of South Africa. Amosite is the fibrous form of amphiboles in the Cummingtonite-Grunerite solid solution series. Amosite is sometimes called brown asbestos. After chrysotile it is the 2nd most common type of asbestos. The most common amphibole is hornblende and if it was fibrous it would be considered ''amosite.''

Asbestos, amphibole

Asbestos, amphibole synonyms, Asbestos, amphibole pronunciation, Asbestos, amphibole translation, English dictionary definition of Asbestos, amphibole. n. Any of a large group of structurally similar silicate minerals, such as hornblende, that have a crystalline structure consisting of a double chain of...

Amphibole asbestos soil contamination in the U.S.A.: A ...

2011-4-1 · While amphibole asbestos deposits occur in mafic and ultramafic provinces, soil amphiboles occur evenly distributed across the U.S.A. The majority of the amphiboles found in the soils would likely not meet the mineralogical definition of asbestos (i.e., they would not have been derived from asbestiform amphiboles); however, the majority would ...

Types of Asbestos

2013-11-21 · (see reference 19 for an overview of asbestos terms). The chemical definition of asbestos used by regu-latory agencies for identification includes six mineral species. These minerals are chrysotile, crocidolite, amosite, tremolite, actinolite, and anthophyllite (5, 7, 16). Chrysotile is the asbestos form of serpentine, a sheet silicate.

4. CHEMICAL AND PHYSICAL INFORMATION

2012-1-18 · ASBESTOS 135 4. CHEMICAL AND PHYSICAL INFORMATION 4.1 CHEMICAL IDENTITY Asbestos is a generic term for a group of six naturally-occurring, fibrous silicate minerals that have been widely used in commercial products. Asbestos minerals fall into two groups or classes, serpentine asbestos and amphibole asbestos.

DEFINITION FOR ASBESTOS.

A definition of asbestos is proposed. Under this definition, the term asbestos applies to six naturally occurring minerals exploited commercially for their desirable physical properties, which are in part derived from their asbestiform habit. The six minerals are the serpentine mineral chrysotile and the amphibole minerals grunerite asbestos (also referred to as amosite), riebeckite asbestos ...

ASBESTOS (CHRYSOTILE, AMOSITE, CROCIDOLITE, …

The definition of pathogenic fibre properties as "sufficiently long, thin, and durable" is the subject of much debate, as are the differences between the exposure–response relationships or retained dose–response relationships of asbestos fibres in man and in rats, and the potential differences in …