Crocidolite, CAS No. One formula given for crocidolite is Na 2 Fe II 3 Fe III 2 Si 8 O 22 2. However, its known to be the most dangerous type of asbestos. Crocidolite was rarely used in commercial products because it was found to be much less heat resistant than other types of asbestos. Some bundles consisted of a few fibers, and others consisted of dozens of fibers. The stone is extremely popular as a semi-precious stone and is known by many trade names such as Tiger's Eye, Hawk's Eye, Falcon's Eye, etc. Morphological and molecular alterations suggestive of … … The darker-colored forms which are individually crystallized are generally of igneous origin, such as volcanic rock and pegmatites. While crocidolite was the third most used asbestos type in Australia, it has been responsible for more asbestos-related deaths than any other type. or in mesothelioma, which is a rapidly fatal form of lung cancer. A pseudomorph is an atom by atom replacement of one mineral for another, without significant … We found that most of the crocidolite fibers formed bundles at the uptake by mesothelial cells (Fig. This page shows answers to the clue Crocidolite, followed by 2 definitions like “Called also blue asbestus”, “A bluish, asbestine variety of riebeckite” and “A mineral occuring in silky fibers of a lavender blue color”. Crocidolite occurs in metamorphic shales, forming pockets and veins. The sharp fibres puncture the lining of the lungs and the … At this exhibition I found a splendid display of crocidolite, the sight of which well repaid the visit. Crocidolite was the most commonly used amphibole asbestos in the past. Pietersite contains blue crocidolite asbestos, which is considered one of the most dangerouss minerals known to human health. We found one answer for “Crocidolite” . Asbestos consists mostly of magnesium silicate minerals—chrysotile, anthophyllite, and crocidolite. It has harsh spiky fibres that have good tensile strength and resistance to heat and was used frequently as a fireretardant in thermal insulation prod-ucts and in ceiling tiles. Crocidolite, or Blue Asbestos. If its fibers or particles enter the lungs, they can cause asbestosis. 4 • Chrysotile is … Dimensions 69mm x 32mm x 75mm. Among asbestos fibers, crocidolite is considered the most and chrysotile the least oncogenic. White Asbestos is typically found in Garage roofs, Shed roof, Artex ceilings and Waste flues. Studies show that crocidolite is so hazardous, it may be responsible for more illnesses and deaths than any other type of asbestos. Other … Example sentences for Crocidolite. Crocidolite, commonly known as Blue Asbestos. Use a respirator mask with a high-efficiency particulate air filter or an N-100, P-100 or R-100 … Crocidolite found in South Africa were mined in the following prov-inces Limpopo, Northern Cape and Mpumalanga. Chrysotile Asbestos – This is the most common form of asbestos, accounting for approximately 90 percent of commercial asbestos use around the world. Crocidolite. Asbestos is a particular problem for anyone working in the construction industries or in demolition. Canton Viaduct Quarry) now part of Borderland State Park in Massachusetts, US. Scientifically speaking, asbestos is actually a group of six fibrous minerals: chrysotile, amosite, antophyllite, actinolite, tremolite and crocidolite. Eureka Shaft, Cheyenne Mining District, El Paso Co., Colorado, USA. We found that chrysotile and crocidolite exposures have similar effects on human mesothelial cells. The riebeckite granite known as ailsite, found on the island of Ailsa Craig in western Scotland, is prized for its use in the manufacture of curling stones. blue asbestos; riebeckite; crocidolite (Port. Blue color sets it apart from other asbestiform minerals. How Can Jewelers Avoid Asbestos Exposure? Tremolite is a creamy white to dark green variety of asbestos that gets its colouring based on the iron content. They have fair flexibility and are strong. Crocidolite asbestos, which is also known as blue asbestos due to the color of its fibers, occurs in South Africa, as well as in Bolivia and Australia. Large quantities of crocidolite (in veins) are located near Griquatown and in northeastern Transvaal (South Africa). Crocidolite is an amphibole-class asbestos material, meaning it has straight, extremely thin, and sharp fibres that take next-to-no effort to penetrate the human body. Asbestosis is a lung disease caused by inhalation of asbestos particles, which causes several cancers, particularly lung cancer and … Its limited use was a result of its lower heat resistance than some other forms of asbestos. A lot less known … Blue asbestos, known as crocidolite, is not as widely used as the other asbestos types, but that doesn’t make it any less deadly. It is widely considered to be the most deadly form of asbestos, with some reports estimating that up to 18% of crocidolite miners died of mesothelioma , and some studies suggest that people living near crocidolite mines have a higher risk of asbestos-related illnesses. Where is Crocidolite Asbestos Found? Opal and quartz pseudomorphs after crocidolite are characterized by a beautiful silky luster and are used in … ); Krokidolit (Deut.) Therefore, individuals in close proximity to airborne crocidolite asbestos are very likely to inhale toxic fibers, which are responsible for approximately 10% of all … It was simple to use, but not so simple to say. Crocidolite or blue asbestos is similar to chrysotile but somewhat inferior in fire … Crocidolite was primarily used in products such as asbestos … The Crocidolite variety is a type of asbestos, and is sometimes also referred to as “blue asbestos”. Jewelers should do the following to limit asbestos exposure: Avoid working with gemstones known to contain asbestos. In the USSR crocidolite deposits are found in the vicinity of Krivoi Rog and in the Urals (the Moiva River in Cherdyn’ Raion). Crocidolite is one of the asbestos minerals, it is also known as the blue asbestos. Crocidolite definition, a bluish, asbestine variety of riebeckite. Crocidolite is seen under a microscope as a blue fiber. Is commonly found as part of steam engines, pipe insulation, spray-on coatings, types of cement wallboard and more. BLUEASBESTOS. Crocidolite is one of the six naturally occuring minerals that may compose asbestos. Crocidolite is also known as "blue asbestos" and "riebeckite asbestos". Chrysotile accounts for more than 90% of the asbestos used worldwide, but its capacity to induce malignant mesothelioma is still debated. It is found in Europe, Africa, South America and the United States. Crocidolite, kro-sid′o-līt, n. a mineral consisting mainly of silicate of iron, in asbestos-like fibres. Crocidolite fibers have a harsh texture. What Building materials is it found in? Riebeckite. Crocidolite is a minor commercial form of asbestos, called blue asbestos. Asbestosis (i.e., fibrosis of the lung parenchyma caused by asbestos) is found in patients who were heavily exposed to asbestos fibers (mainly chrysotile, and the serpentines crocidolite, amosite, and tremolite), for example, during the manufacture of asbestos–cement products, friction materials or fireproof textiles, or when using asbestos for heat insulation or fire protection purposes in … It has long, sharp, brittle fibres that break down and become airborne easily. Crocidolite. While left intact and undisturbed, asbestos is not particularly harmful. There used to be a filling station where Rolf's restaurant is now located and the local name "Touchenite" is after the name of the owner. Chrysotile. Definitions of “Crocidolite” If the answer you seek is not in the answers above these definitions may help solving your crossword … Crocidolite, also known as blue asbestos, is also found in South Africa, as well as in Bolivia and Australia. Large quantities of crocidolite (in veins) are located near Griquatown and in northeastern Transvaal (South Africa). The nature of the fibres, containing a combination of iron, magnesium, and high soda content, can cause it to appear blue and vivid, which is particularly dangerous for children and animals. The fibers of crocidolite are fairly flexible, but will bend beyond ninety degrees before … As you can see asbestos names are a bit of a mouthful, so the different types of asbestos are often referred to by colour: White Asbestos (Chrysotile) Brown Asbestos (Amosite) Blue … Crocidolite fibres are short and sharp. Crocidolite; Asbestos was an extremely popular and widely used material in the construction industry, because it was cheap, in good supply, strong and insulating. Where it becomes a danger is when the surface of the asbestos product deteriorates, becomes broken or when it is removed. Here are a few of the places you might find Asbestos at … It is a local name for (I think) silicified crocidolite found in the flood plain of the brook. This asbestos has a high magnesium … Abestos is toxic and inhalation of asbestos fibers can … The finely fibrous variety, known as Crocidolite, usually originates from altered metamorphic rocks. crocidolite asbestos. Similarly to Amosite, Crocidolite is from the Amphibole mineral family. Riebeckite granite was used for the facing stones of the Canton Viaduct from Moyles Quarry (a.k.a. Crocidolite belongs to the amphibole family of minerals and has needlelike fibres. About four percent of the total asbestos commercially in the United States is crocidolite. In the USSR crocidolite deposits are found in the vicinity of Krivoi Rog and in the Urals (the Moiva River in Cherdyn’ Raion). Both fiber bundles and individual … Tremolite. Crocidolite and Amosite are part of the same family and were both mined mainly in South Africa. Crocidolite – Blue Asbestos. It is considered to be the most hazardous form of asbestos, and should never be brought near the mouth. Special thanks to Donald Peck for this information. The major reason for its limited use is that it has less heat resistance than some of the other asbestos products. Crocidolite definition is - a lavender-blue or light green mineral of the amphibole group that occurs in silky fibers and in massive form and is a type of asbestos. See more. Crocidolite. It may also … Asbestos minerals consist of thin, separable fibers that have a parallel arrangement. The Crocidolite variety is a type of asbestos, and is sometimes also referred to as "blue asbestos". Opal and quartz pseudomorphs after crocidolite are characterized by a beautiful silky luster and are used in … Actinolite can also be a trace contaminant found in mineral-rich concoctions of paints, sealants, fireproofing products, concrete products, gardening soils and more. The commonwealth's name is even taken from an Algonquian word for the Great … Crocidolite asbestos accounted for only four percent of all of the asbestos mined commercially in this country. Crocidolite fibers are used to reinforce polymers and as heat resistant textiles. Similarly to the other types of asbestos in the amphibole group, it has long, straight, and friable fibers. Crocidolite. Crocidolite asbestos can be found in a variety of construction materials and insulation materials. Once these health risks were firmly documented in the 1970s, regulatory agencies in the United States and other developed nations began placing tight restrictions on workers’ exposure to asbestos in industrial … 12001-28-4, commonly known as blue asbestos, is the fibrous form of the amphibole riebeckite, found primarily in southern Africa, but also in Australia and Bolivia. It was banned in the UK in 1970. The health risks associated with asbestos (sometimes misspelled abestos) are generally well known. Asbestos of the crocidolite form is traditionally found in Western Australia, Bolivia and South Africa. They cause long-lasting damage when inhaled. • Amosite is also known as ‘brown asbestos’ and is like crocido-lite, a member of the ampibole group. Small dark minerals found underground. Aligned Riebeckite needles … It is most commonly found in Western Australia, Bolivia and South Africa. Crocidolite occurs in metamorphic shales, forming pockets and veins. It is considered the most dangerous type of commonly used asbestos. 2 A, B, D and F). Synonyms and Related Terms. Common Products Made with Actinolite Asbestos: Vermiculite loose-fill attic insulation; Drywall; Children’s toys ; Sealants; Talcum powder; Asbestos concrete; Structural fireproofing materials made with vermiculite; If you or a loved … It was found that prolonged inhalation of some forms of the tiny fibres can result in a lung condition known as asbestosis (q.v.) Crocidolite was used in products such as cement, tiles and insulation materials. They are both part of the mineral family known as ‘Amphiboles’. Crocidolite was found in 16% of the cases and accounted for 3% of fibers exceeding 5 microns in length. Unfortunately, its widely used in commercial properties, pipe insulation and many other cement products. Crocidolite is a relatively rare mineral with very restricted occurrence, it is found in metamorphosed iron formations as slender and flexible fiber bundles. 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