definition of asbestos amphibole

Asbestos | definition of asbestos by Medical dictionary

Any of a large group of structurally similar silicate minerals, such as hornblende, that have a crystalline structure consisting of a double chain of linked SiO4 units and that contain various combinations of sodium, calcium, magnesium, iron, and aluminum. Several varieties of …

Asbestos: Types, Uses, Dangers | SchoolWorkHelper

Serpentine asbestos (chrysotile or white asbestos) was the most commonly used type of asbestos. Chrysotile asbestos fibres are soft, flexible and curved and far less hazardous than the amphibole type.

Amphibole Asbestos - definition of Amphibole Asbestos by ...

Amphibole definition, any of a complex group of hydrous silicate minerals, containing chiefly calcium, magnesium, sodium, iron, and aluminum, and including hornblende ...

Asbestos: general information - GOV.UK

Definition of asbestos, amphibole in the Definitions.net dictionary. Meaning of asbestos, amphibole. Information and translations of asbestos, amphibole in the most comprehensive dictionary definitions resource on the web.

Amphibole | Definition of Amphibole at Dictionary.com

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. It should be noted that serpentine and amphibole minerals also occur in nonfibrous or nonasbestiform forms.

VERMICULITE IS NOT ASBESTOS

Asbestos, Amphibole-group Minerals (n.). 1. A class of asbestos that includes silicates of magnesium, iron, calcium, and sodiumThe fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE.

Asbestos - Wikipedia

Asbestos can be divided into two basic groups, serpentine, and amphibole, which differ in their physical characteristics. Serpentine asbestos develops in a layered or tiered form, whereas amphibole asbestos has a chain-like structure. Identification. Asbestos is generally made up of fiber bundles which easily separate into long, thin fibers.

Amosite | Definition of Amosite by Merriam-Webster

Amphibole (/ ˈ æ m f ɪ b oʊ l /) is a group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. Amphiboles can be green, black, colorless, white, yellow, blue, or brown. The International Mineralogical Association currently classifies ...

Common Types of Asbestos- Serpentine Amphibole Fiber Groups

Asbestos, Amphibole-group Minerals (n.). 1. A class of asbestos that includes silicates of magnesium, iron, calcium, and sodiumThe fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE.

Common Types of Asbestos- Serpentine Amphibole Fiber Groups

Asbestos (pronounced: / æ s ˈ b ɛ s t ə s / or / æ s ˈ b ɛ s t ɒ s /) is a naturally-occurring fibrous silicate mineral.There are six types, all of which are composed of long and thin fibrous crystals, each fibre being composed of many microscopic "fibrils" that can be released into the atmosphere by abrasion and other processes. Asbestos is an excellent electrical insulator and is ...

amphibole asbestos : definition of amphibole asbestos and ...

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 …

Asbestos Meaning | Best 10 Definitions of Asbestos

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. It should be noted that serpentine and amphibole minerals also occur in nonfibrous or nonasbestiform forms.

Some Facts About Asbestos - CAPCOA

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 …

Amphibole - definition of amphibole by The Free Dictionary

Define amphibole. amphibole synonyms, amphibole pronunciation, amphibole translation, English dictionary definition of 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...

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

Exposure to amphibole asbestos increases the frequency of positive ANA tests in nonautoimmune prone mice and rats [39–41] (Table 3).Mice exposed to amphibole asbestos (tremolite) exhibited immune complex deposition in the kidneys and mild glomerular changes suggestive of lupus nephritis [].The amphibole initially obtained by the U.S. Geological Survey (USGS) from the Libby mine site …

4. CHEMICAL AND PHYSICAL INFORMATION

Amphibole Asbestos (n.). 1. A class of asbestos that includes silicates of magnesium, iron, calcium, and sodiumThe fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE.

4. CHEMICAL AND PHYSICAL INFORMATION

amphibole (ăm`fəbōl'), any of a group of widely distributed rock-forming minerals, magnesium-iron silicates, often with traces of calcium, aluminum, sodium, titanium, and other elements.The amphibole minerals are closely related in crystal structure, but they crystallize in two different systems, orthorhombic and monoclinic; their close structural relationship is reflected in uniform prism ...

VERMICULITE IS NOT ASBESTOS

Nov 03, 2016· 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 actinolite; Exposure to either chrysotile or amphibole asbestos increases the risk of disease.

Amphibole - Wikipedia

The D6281-09 method defines asbestos as follows: 3.2.3 amphibole asbestos—amphibole in an asbestiform habit. 3.2.6 asbestos—a collective term that describes a group of naturally occurring, inorganic, highly fibrous, silicate dominated minerals, which are easily separated into long, thin flexible fibers when crushed or processed.

Asbestos Toxicity: What Is Asbestos | Environmental ...

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.

What is Asbestos: Types & Potential Risks After Exposure

Asbestos is a group of fibrous silicate minerals. There are two classes of asbestos: serpentine and amphibole. Asbestos is now used much less widely in the United States and many other countries than in the past. Asbestos is stable and persists in the environment.

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

What does asbestos mean? Any of six incombustible, chemical-resistant, fibrous minerals of impure magnesium silicate, occurring in either serpent...

Asbestos, amphibole - definition of Asbestos, amphibole by ...

Define asbestos. asbestos synonyms, asbestos pronunciation, asbestos translation, English dictionary definition of asbestos. n. 1. Any of six incombustible chemical-resistant silicate minerals, including one serpentine and five amphiboles, that separate easily into long, thin,...

Amphibole | Definition of Amphibole by Merriam-Webster

Amphibole asbestos includes the other five asbestos minerals: Amosite, crocidolite (also called blue asbestos), tremolite, actinolite and anthophyllite. These minerals are composed of brittle, needle-shaped fibers. Because of these properties, amphibole fibers are …

Overview | Asbestos | ATSDR

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 asbestos-related cancer and asbestos diseases.

Asbestos - definition of asbestos by The Free Dictionary

called asbestos (see sidebar on Serpen-tine and Amphibole Crystal Structure and Shape). Asbestiform varieties of several other amphiboles have been identified. Other minerals are similar to asbestos in their particle shape, but they do not pos-sess the characteristics required to clas-sify them as asbestos (see definition of asbestos above).

Types of Asbestos That Can Cause Asbestos Diseases ...

Amphibole asbestos includes the other five asbestos minerals: Amosite, crocidolite (also called blue asbestos), tremolite, actinolite and anthophyllite. These minerals are composed of brittle, needle-shaped fibers. Because of these properties, amphibole fibers are …

Is It Asbestos? It's All in the Form: Asbestiform vs. Non ...

Nov 03, 2016· 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 actinolite; Exposure to either chrysotile or amphibole asbestos increases the risk of disease.

Amphibole Asbestos | Article about Amphibole Asbestos by ...

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.

Banning Asbestos in the US: History, Facts & the Murray Bill

Asbestos, Amphibole (n.). 1. A class of asbestos that includes silicates of magnesium, iron, calcium, and sodiumThe fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE.

asbestos amphibole group : definition of asbestos ...

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)).

Autoimmunity and Asbestos Exposure

asbestos forms, even of the same amphibole, are mineralogically distinct, fracture in critically different ways, and the dusts formed by breakage have different effects on health. While asbestos dusts are carcinogenic in animals and humans, the prismatic amphibole dusts are very much less potent, and probably harmless to humans.

asbestos amphibole group : definition of asbestos ...

Amphibole definition is - hornblende. 2: any of a group of complex silicate minerals with like crystal structures that contain calcium, sodium, magnesium, aluminum, or iron ions or a combination of them

Overview | Asbestos | ATSDR

Serpentine asbestos (chrysotile or white asbestos) was the most commonly used type of asbestos. Chrysotile asbestos fibres are soft, flexible and curved and far less hazardous than the amphibole type.

Asbestos | Definition of Asbestos at Dictionary.com

Asbestos can be divided into two basic groups, serpentine, and amphibole, which differ in their physical characteristics. Serpentine asbestos develops in a layered or tiered form, whereas amphibole asbestos has a chain-like structure. Identification. Asbestos is generally made up of fiber bundles which easily separate into long, thin fibers.

Amphibole - Wikipedia

Asbestos minerals won't burn. They can be woven and possess high tensile strength, flexibility, and resistance to chemicals, heat, and electricity. The minerals that can crystallize as asbestos belong to two groups: serpentine (chrysotile) and amphibole (crocidolite, amosite, anthophyllite, tremolite, and …

Asbestos: general information - GOV.UK

Exposure to amphibole asbestos increases the frequency of positive ANA tests in nonautoimmune prone mice and rats [39–41] (Table 3).Mice exposed to amphibole asbestos (tremolite) exhibited immune complex deposition in the kidneys and mild glomerular changes suggestive of lupus nephritis [].The amphibole initially obtained by the U.S. Geological Survey (USGS) from the Libby mine site …

asbestos amphibole : definition of asbestos amphibole and ...

Dec 15, 2020· Asbestos is a group of six naturally occurring silicate minerals made up of thin, microscopic fibers. Asbestos offers heat and chemical resistance, fireproofing and strength. As a result, asbestos was a popular additive to a variety of products. Individuals exposed to asbestos face health risks including cancer and other illnesses.

Chapter 6.2 Asbestos - World Health Organization

The factor that separates amphibole asbestos from serpentine asbestos is their chemical composition. Amphibole asbestos is composed of double chained silicates and contains a significant amount of iron (Fe). Amphibole asbestos and serpentine asbestos also have differences in their structure of fibers.

Importance of Asbestos Awareness Course | Asbestos ...

asbestos [as-bes´tos] fibrous calcium and magnesium silicate, a nonburning compound used in roofing materials, insulation for electric circuits, brake linings, and many other products that must be fire resistant. Alternative materials are being developed to replace asbestos because fine asbestos fibers can be inhaled, causing asbestosis, pleural ...