What is crocidolite used for?
Crocidolite was also used in common commercial products in the U.K. Some considered crocidolite to be the best of all the asbestos fibres, due to its flexibility, strength and chemical resistance. These properties led to it being used extensively in battery casings.
What does amosite stand for?
mass noun. An iron-rich amphibole asbestos, mined in South Africa.
What are Asbestiform fibers?
Asbestiform is a crystal habit. It describes a mineral that forms long fibres that are flexible, of high tensile strength, and form in fibrous aggregates of thin crystals that readily separate. The most common asbestiform mineral is chrysotile and many amphibole minerals can also be asbestiform.
What type of silicate is asbestos?
fibrous silicate minerals
Asbestos are fibrous silicate minerals (i.e., serpentine and amphibole) that are present in a number of widely used industrial materials (e.g., chrysotile, crocidolite, and amosite) with tensile strength and heat resistance.
What color is amosite?
Amosite (brown asbestos) was used most frequently in cement sheets and pipe insulation.
What is the correct name for crocidolite?
crocidolite, also called Blue Asbestos, a gray-blue to leek-green, fibrous form of the amphibole mineral riebeckite. It has a greater tensile strength than chrysotile asbestos but is much less heat-resistant, fusing to black glass at relatively low temperatures.
Where can you find crocidolite?
Where is Crocidolite Asbestos Found? It is most commonly found in Western Australia, Bolivia and South Africa. Crocidolite asbestos accounted for only four percent of all of the asbestos mined commercially in this country. Its limited use was a result of its lower heat resistance than some other forms of asbestos.
What is asbestiform degeneration?
Asbestiform degeneration, frequent in aged cartilage, is due to the formation of localized aggregates of thick, abnormal collagen fibrils. Poor Regeneration of Cartilage Tissue.
What are fibrous silicates?
Asbestos refers to a group of naturally occurring fibrous minerals. These silicate minerals can be divided mineralogically into serpentines and amphiboles. It is a sheet silicate mineral rolled into a hollow tube structure. Amphiboles include crocidolite, actinolite, tremolite, amosite, and anthophyllite.
What is the chemical composition of crocidolite?
| PHYSICAL & CHEMICAL INFORMATION | |
|---|---|
| Physical State; Appearance LAVENDER, BLUE OR GREENISH FIBROUS SOLID. Physical dangers Chemical dangers | Formula: Na2 Fe++3 Fe+++2 Si8 O22 (OH)2 Molecular mass: 765.98 Decomposes at 1200°C Relative density (water = 1): 3.3-3.4 Solubility in water: none |
Where is amosite used?
Amosite (brown asbestos) was used most frequently in cement sheets and pipe insulation. It can also be found in insulating board, ceiling tiles and thermal insulation products. Crocidolite (blue asbestos) was commonly used to insulate steam engines.
Where is crocidolite found?
It is most commonly found in Western Australia, Bolivia and South Africa. Crocidolite asbestos accounted for only four percent of all of the asbestos mined commercially in this country. Its limited use was a result of its lower heat resistance than some other forms of asbestos.
Which is worse for you crocidolite or amosite?
In fact, amosite is the second deadliest form of asbestos after crocidolite. However, it is much more common than crocidolite, which makes it the biggest asbestos threat to humans. Loose fibres of amosite can contaminate the air and be inhaled.
What kind of materials can amosite be used in?
As we mentioned, amosite was the second most common type of asbestos used after chrysotile. It found its way into a variety of construction materials, such as gaskets cement sheets, insulation, vinyl tiles, roofing materials and other materials where thermal or chemical insulation were called for.
Which is the safest way to test for amosite?
To definitively identify amosite asbestos, expert asbestos testing and analysis is needed. Your safest course is to hire a professional to analyse the materials in your property safely.
Why are amphibole silicates classified as a chain?
Amphibole silicates are classified as ‘chain silicates’ because the tetrahedra are arranged to form a double chain of two rows aligned side by side. Magnesium is coordinated with the oxygen atom in serpentine silicates.