Ben Shelton on thu 27 jul 06
I am doing a little glaze testing and have noticed that my GlazeMaster
software has 3 different Spodumenes listed. All with names that do not
coincide with the names my local supplier lists. I can get Australian
spodumene but I have no idea what its chemical analysis is. Does anyone know
what the analysis is or which spodumene in Glazemaster is closest to
"Australian" spodumene?
Thanks all
Ben
Jason Hooper on thu 27 jul 06
Hi Ben,
My sack of spodumene from Australia is the Gwalia variant. It is white,
granular and slightly sparkly. I found it causes some foaming in glazes,
which is apparently caused by traces of detergent. I calcine the
spodumene to cone 016 and that burns it off.
There are some old threads about spodumene variants. Here's a quote
about the foaming:
"A process used to separate the spodumene from other minerals involves
addition of soap which will cause this form of spodumene to cause foamy
glaze mixes. Several suggestions were made for eliminating the foam: (1)
calcine the spodumene; (2) add silicon defoamer obtainable from swimming
pool maintenance companies; (3) wait several weeks after the glaze is
mixed and the foaming tendency goes away by itself; or (4) Rinse the
glaze mix by repeatedly adding excess water, letting the glaze resettle,
and then siphoning off water."
Ben Shelton wrote:
> I am doing a little glaze testing and have noticed that my GlazeMaster
> software has 3 different Spodumenes listed. All with names that do not
> coincide with the names my local supplier lists. I can get Australian
> spodumene but I have no idea what its chemical analysis is. Does anyone know
> what the analysis is or which spodumene in Glazemaster is closest to
> "Australian" spodumene?
cheers,
Jason
Mike Gordon on thu 27 jul 06
Ben,
This may help, I made this request a year ago looking for Sons of =20
Gwalia spodumene. Maybe Laguna has the analysis you need.
Mike Gordon
American Minerals, Inc., are the exclusive representatives for sales of =20=
spodumene produced by Sons of Gwalia Ltd. (Perth, Western Australia) in =20=
North and South America.=A0Of the four stocking distributors that we =
have =20
in the United States, the closest one to you would be Laguna Clay Co. =20=
(City of Industry, CA).=A0 Their phone=A0number is 626-330-0631 and fax =20=
number: 626-333-7694.=A0 Please let us know if we can be of futher =20
assistance.
=A0
On Jul 27, 2006, at 4:54 AM, Ben Shelton wrote:
> I am doing a little glaze testing and have noticed that my GlazeMaster
> software has 3 different Spodumenes listed. All with names that do not
> coincide with the names my local supplier lists. I can get Australian
> spodumene but I have no idea what its chemical analysis is. Does =20
> anyone know
> what the analysis is or which spodumene in Glazemaster is closest to
> "Australian" spodumene?
>
>
> Thanks all
>
>
> Ben
>
> =
_______________________________________________________________________=20=
> _______
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at =20
> melpots@pclink.com.
>
steve blankenbeker on thu 27 jul 06
Ben,
Go to www.spodumene.com. This is the website for
Gwalia, which is the Australian producer, and maybe
the only producer, of available spodumene. At one
time Standard Ceramics was an exclusive distributor of
Gwalia's. They have specifications there.
If recipes are older, they may have referred to the
spodumene and associated products that were mined in
NC. As a lithium source in glazes maybe it doesn't
make so much of a difference, but I played with
Gwalia's stuff several years ago and in bodies it
didn't act like traditional spodumene was supposed to.
Steve
--- Ben Shelton wrote:
> I am doing a little glaze testing and have noticed
> that my GlazeMaster
> software has 3 different Spodumenes listed. All with
> names that do not
> coincide with the names my local supplier lists. I
> can get Australian
> spodumene but I have no idea what its chemical
> analysis is. Does anyone know
> what the analysis is or which spodumene in
> Glazemaster is closest to
> "Australian" spodumene?
>
>
> Thanks all
>
>
> Ben
>
>
______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change
> your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be
> reached at melpots@pclink.com.
>
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Hank Murrow on thu 27 jul 06
On Jul 27, 2006, at 4:54 AM, Ben Shelton wrote:
> I am doing a little glaze testing and have noticed that my GlazeMaster
> software has 3 different Spodumenes listed. All with names that do not
> coincide with the names my local supplier lists. I can get Australian
> spodumene but I have no idea what its chemical analysis is. Does
> anyone know
> what the analysis is or which spodumene in Glazemaster is closest to
> "Australian" spodumene?
Here is an analysis for Gwalia Spodumene from Down under:
K2O, .005
Na2O, .019
CaO, 003
Li2O. .969
Al2O3, .971
SiO2, 4.090
MW, 381
Cheers, Hank
www.murrow.biz/hank
PS: If you can find Tanco Low Melt Spodumene from Canada, give it a
try. I get it from Georgies in Portland OR.
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