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Three polytypes of chrysotile are known. [8] These are very difficult to distinguish in hand specimens, and polarized light microscopy [6] must normally be used. Some older publications refer to chrysotile as a group of minerals—the three polytypes listed below, and sometimes pecoraite as well—but the 2006 recommendations of the International Mineralogical Association prefer to treat it as ...
The most common asbestiform mineral is chrysotile, commonly called "white asbestos", a magnesium phyllosilicate part of the serpentine group. Other asbestiform minerals include riebeckite, an amphibole whose fibrous form is known as crocidolite or "blue asbestos", and brown asbestos, a cummingtonite-grunerite solid solution series.
This is a documentation subpage for Template:Country data United States of Indonesia. It may contain usage information, categories and other content that is not part of the original template page. Template:Country data Republic of Indonesia (1949–1950)
Asbestos (/ æ s ˈ b ɛ s t ə s, æ z-,-t ɒ s / ass-BES-təs, az-, -toss) [1] is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals.There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width) [2] being composed of many microscopic "fibrils" that can be released into ...
Antigorite is the polymorph of serpentine that most commonly forms during metamorphism of wet ultramafic rocks and is stable at the highest temperatures—to over 600 °C (1,100 °F) at depths of 60 km (37 mi) or so. In contrast, lizardite and chrysotile typically form near the Earth's surface and break down at relatively low temperatures ...
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Some vermiculite deposits, most notably those in Libby, Montana, are contaminated with chrysotile (as well as other forms of asbestos) that formed from diopside. [ 8 ] At relatively high temperatures, there is a miscibility gap between diopside and pigeonite , and at lower temperatures, between diopside and orthopyroxene .
Lizardite, chrysotile, and antigorite all have approximately the formula Mg 3 (Si 2 O 5)(OH) 4 or (Mg 2+, Fe 2+) 3 Si 2 O 5 (OH) 4, but differ in minor components and in form. [10] Accessory minerals, present in small quantities, include awaruite, other native metal minerals, and sulfide minerals. [12] Ophiolite of the Gros Morne National Park ...