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TitleMica and vermiculite / Mica et vermiculite
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCollings, R K; Andrews, P R A
SourceCanada Centre for Mineral and Energy Technology, Summary Report no. 5, 1991, 91 pages, Open Access logo Open Access
Alt SeriesCanada Centre for Mineral and Energy Technology, Canmet Report CM 90-3E
PublisherEnergy, Mines and Resources Canada
Lang.English; French
Mediapaper; on-line; digital
File formatpdf
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
Subjectsindustrial minerals; Economics and Industry; Science and Technology; minerals; mica; muscovite; phlogopite; vermiculite; mineral industry; mining activities; mineral processing; Mining industry
Illustrationstables; location maps; flow diagrams; schematic diagrams
Released1991 01 01; 2021 07 15
AbstractMica is a group name for a number of hydrous aluminosilicate minerals, such as muscovite, phlogopite, biotite and lepidolite. Muscovite and phlogopite are the principal commercial micas.
Muscovite of commercial interest occurs in sheet and flake form associated with quartz and feldspar in pegmatites. Phlogopite occurs in sheet and flake forms in basic ferromagnesian rocks. Deposits of particular interest occur in eastern Ontario and southeastern Quebec, although occurrences have been noted in several other provinces. There is only one producer of mica in Canada, Suzorite Mica Products Inc., a division of Lacana Petroleum Limited, which operates a deposit of phlogopite mica in Suzor Township, Quebec. The bulk of production is exported to the United States, Japan and Europe. There is no current production of muscovite in Canada; our limited requirements are met by imports from the United States, France and India.
Mica has several unique properties, that is, uniform basal cleavage, high dielectric strength, toughness and flexibility, which have resulted in its broad use in electric and electronic applications. Other uses include filler and strengthener in paint and plastics, and as a substitute for asbestos in joint-filling compounds.
Mica may be processed and used in the dry-ground, water-ground and micronized form. Unique techniques are being developed for treating mica flakes, such as acid leaching and surface coating, to extend the use of mica, particularly in plastic composites.
Vermiculite closely resembles mica but differs in one important aspect: it expands on heating to make a lightweight product that is useful as an insulator in building construction and as a lightweight aggregate in concrete. There is no production of vermiculite ore in Canada; however, imported crude vermiculite is expanded at several Canadian plants for insulation and concrete applications.
Mica and vermiculite processing and beneficiation have been studied extensively by CANMET during the past 50 years. Beneficiation studies of these minerals by CANMET and other organizations are summarized in the appendices.

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