Bill Merrill on wed 28 oct 09
I use mica from an outcropping close to Thermopolis, Wyoming. It is
also called Muscovite and was used in Russia for small windows and on
stoves that you could see into. The mica is layered and comes apart
easily. I have used it in painting as I grind it up in a blender....
They have used mica in cosmetics, the rubber industry etc and all sorts
of industrial use.
=3D20
I have not found in the literature I have looked at that Mica or
vermiculite have any asbestos. I just read an abstract on a person
with lung disease who worked in a mica plant for 30 years and had lung
issues, but he did not have asbestos in even trace amounts.
=3D20
Vermiculite is a form of mica and is transformed by the heating process,
where it expands like popcorn to 10-20 times it's original size. =3D20
=3D20
I am not a chemist, but I cannot find that vermiculite has asbestos in
it. That doesn't mean its not true, I just haven't found any literature
that says it does. =3D20
=3D20
You can buy vermiculite or pearlite in most states.
=3D20
http://www.mineralszone.com/minerals/vermiculite.html
=3D20
The general formula for minerals of the mica group is XY2-3Z4O10(OH, F)2
with X =3D3D K, Na, Ba, Ca, Cs, (H3O), (NH4); Y =3D3D Al, Mg, Fe2+, Li, Cr,=
=3D
Mn,
V, Zn; and Z =3D3D Si, Al, Fe3+, Be, Ti. Compositions of the common
rock-forming micas are given in the Table.
Com'on NeonCat help us out here.....
Bill Merrill
=3D20
Sherron & Jim Bowen on thu 29 oct 09
Protect Your Family from Asbestos-Contaminated Vermiculite Insulation
Vermiculite is a naturally occurring mineral composed of shiny flakes,
resembling mica. When heated to a high temperature, flakes of vermiculite
expand as much as 8-30 times their original size. The expanded vermiculite
is a light-weight, fire-resistant, and odorless material and has been used
in numerous products, including insulation for attics and walls. Sizes of
vermiculite products range from very fine particles to large (coarse) piece=
s
nearly an inch long. A mine near Libby, Montana, was the source of over 70
percent of all vermiculite sold in the U.S. from 1919 to 1990. There was
also a deposit of asbestos at that mine, so the vermiculite from Libby was
contaminated with asbestos. Vermiculite from Libby was used in the majority
of vermiculite insulation in the U.S. and was often sold under the brand
name Zonolite.
If you have vermiculite insulation in your home, you should assume this
material may be contaminated with asbestos and be aware of steps you can
take to protect yourself and your family from exposure to asbestos. This We=
b
page provides important information on how to protect yourself and your
family if you suspect that you might have vermiculite insulation from Libby=
,
Montana.
http://www.epa.gov/asbestos/pubs/verm.html
----- Original Message -----
From: "Bill Merrill"
To:
Sent: Wednesday, October 28, 2009 8:49 PM
Subject: mica/muskovite/vermiculite
I use mica from an outcropping close to Thermopolis, Wyoming. It is
also called Muscovite and was used in Russia for small windows and on
stoves that you could see into. The mica is layered and comes apart
easily. I have used it in painting as I grind it up in a blender....
They have used mica in cosmetics, the rubber industry etc and all sorts
of industrial use.
I have not found in the literature I have looked at that Mica or
vermiculite have any asbestos. I just read an abstract on a person
with lung disease who worked in a mica plant for 30 years and had lung
issues, but he did not have asbestos in even trace amounts.
Vermiculite is a form of mica and is transformed by the heating process,
where it expands like popcorn to 10-20 times it's original size.
I am not a chemist, but I cannot find that vermiculite has asbestos in
it. That doesn't mean its not true, I just haven't found any literature
that says it does.
You can buy vermiculite or pearlite in most states.
http://www.mineralszone.com/minerals/vermiculite.html
The general formula for minerals of the mica group is XY2-3Z4O10(OH, F)2
with X =3D K, Na, Ba, Ca, Cs, (H3O), (NH4); Y =3D Al, Mg, Fe2+, Li, Cr, Mn,
V, Zn; and Z =3D Si, Al, Fe3+, Be, Ti. Compositions of the common
rock-forming micas are given in the Table.
Com'on NeonCat help us out here.....
Bill Merrill
John Britt on thu 29 oct 09
Bill,
The Libby mine in Montana was found liable:
http://www.asbestos.com/news/2008/04/29/wr-grace-plans-to-dig-new-
vermiculite-mine/
Just Google: Libby mine vermiculite, etc
It was a long case and pretty well publicized,
John Britt
http://ncclayclub.blogspot.com
Lorraine Pierce on thu 29 oct 09
Hi Bill, In Maine we called the windows in the old stoves 'Eye-zing glass'
(phonetic spelling).They were in the round high parlour stoves, not the coo=
k
stove in the kitchen. And isn't there a line from a song in the musical
Oklahoma about an 'isinglass curtain you can pull right down in case there'=
s
a change in the weather'! Very OT I guess! But brought back some great
memories of Christmas back on the island. (Vinalhaven) with my island
grandparents. Lori P in Orange Park Fl.
On Wed, Oct 28, 2009 at 9:49 PM, Bill Merrill wrote:
> I use mica from an outcropping close to Thermopolis, Wyoming. It is
> also called Muscovite and was used in Russia for small windows and on
> stoves that you could see into. The mica is layered and comes apart
> easily. I have used it in painting as I grind it up in a blender....
> They have used mica in cosmetics, the rubber industry etc and all sorts
> of industrial use.
>
>
>
> I have not found in the literature I have looked at that Mica or
> vermiculite have any asbestos. I just read an abstract on a person
> with lung disease who worked in a mica plant for 30 years and had lung
> issues, but he did not have asbestos in even trace amounts.
>
>
>
> Vermiculite is a form of mica and is transformed by the heating process,
> where it expands like popcorn to 10-20 times it's original size.
>
>
>
> I am not a chemist, but I cannot find that vermiculite has asbestos in
> it. That doesn't mean its not true, I just haven't found any literature
> that says it does.
>
>
>
> You can buy vermiculite or pearlite in most states.
>
>
>
> http://www.mineralszone.com/minerals/vermiculite.html
>
>
>
> The general formula for minerals of the mica group is XY2-3Z4O10(OH, F)2
> with X =3D K, Na, Ba, Ca, Cs, (H3O), (NH4); Y =3D Al, Mg, Fe2+, Li, Cr, M=
n,
> V, Zn; and Z =3D Si, Al, Fe3+, Be, Ti. Compositions of the common
> rock-forming micas are given in the Table.
>
> Com'on NeonCat help us out here.....
>
> Bill Merrill
>
>
>
Neon-Cat on thu 29 oct 09
Bill M. wrote: "Com'on NeonCat help us out here....."
Hi Bill, I'd much rather be playing on Clayart with you all. But...I
have major home heating issues and a leaking roof, both of which I
need to deal with ASAP. My old floor furnace has failed and can't be
fixed and I hate to be cold or work cold clay. Wet and warm is OK.
Hope to be back soon:>)
Ya all think warm thoughts.
Marian
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