antigorite


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Related to antigorite: chrysotile, Lizardite

antigorite

[an′tig·ə‚rīt]
(mineralogy)
Mg3Si2O5(OH)4 Brownish-green variety of the mineral serpentine. Also known as baltimorite; picrolite.
References in periodicals archive ?
Significant interactions were observed between the number of quarries and the presence of antigorite (p = 0.
This resulted in five predictive factors in die final model: presence of antigorite, distance to peridotite massif [less than or equal to] 10 km, serpentinite surface > 2 [km.
The multivariate Poisson regression model involved six environmental determinants: serpentinite on roads, antigorite, distance to peridorite massif [less than or equal to] 10 km, serpentinite surface > 2 [km.
In particular, a much stronger association with MM risk was found for antigorite (OR = 20.
Unofficial serpentinite qualities containing mostly antigorite were abundant, and this matetial was very commonly used to cover the roads.
As for antigorite fibers, short fibers are not usually taken into account in analyses.
The ARC became interested in Hedman's antigorite because (a) it is the only known antigorite deposit in North America, and (b) it is the only known serpentine deposit that has been conclusively shown to be free of asbestos-like contaminants.
It was only due to the unusual characteristics of Hedman's antigorite ore that the US DOE agreed to enter into a CRADA with Hedman.
The ARC reported a variety of "encouraging" findings, including (a) that Hedman's antigorite fiberized more readily and efficiently than any comparable serpentine that was also considered, (b) that Hedman's antigorite ore possesses unique properties that are not easily defined but clearly of specific value to the fiberization objectives, and (c) that it would be necessary to replicate this result in a larger scale test run in order to more specifically monitor the process, calibrate the apparatus and measure the results to set the stage for further refinements and developments to maximize the desired yield of fiber versus shot as the desired end result of the entire process.
Again, Hedman's antigorite was successfully fiberized and it was verbally reported to Mr.
Hedman submitted samples of the fiberized antigorite to McMaster University and the University of Western Ontario and confirmed that none of the desirable heat related qualities were compromised in the transformation from raw antigorite to fiberized ore.
Renewed and fresh industry interest in Northfil (crushed antigorite from Horwood Lake), based on accurate definitions established by Hedman in 2004, may mature by 2005 to allow the BOD to reconsider the Northfil program and the re-opening of the Matheson facility.