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Australian Spodumene

Alternate Names: Ausi Spodumene, Ausi Spod

Oxide Analysis Formula
Li2O 7.60% 0.98
K2O 0.08% -
Na2O 0.15% 0.01
P2O5 0.17% -
CaO 0.05% -
SiO2 64.50% 4.12
Fe2O3 0.07% -
MnO 0.02% -
Al2O3 26.50% 1.00
TiO2 0.01% -
LOI 0.20%n/a
Oxide Weight 380.77
Formula Weight 381.54


Australian spodumenes are considered the whitest in the world.

The material features [Si2O6]3- chains bonded together by lithium and aluminium ions. It is a monoclinic pyroxene in the form of long tabular, prismatic crystals.

Beta-spodumene (formed at 1082C) has a very low coefficient of thermal expansion, about 1 x 10-6/°C for the range 25°C to 1000°C.

Related Information

Here is why Spodumene powder glistens in the light

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Why Spodumene powder glistens in the light

Spodumene ceramic grade, used in glazes, is a 200 mesh material. How could the particles be big enough to glisten in the light? This is a micrograph of some of the particles from the 0.6% plus 100 mesh material that I extracted in a particle size distribution test. And 8% is plus 200 mesh. And all that material is flakey like this, millions of tiny mirrors. This also explains why the material becomes airborne so easily and why it is really not good to breathe this stuff in.


Description of material
Materials SC7.0 Spodumene
Materials Foote Spodumene
Materials Spodumene
Spodumene is a lithium sourcing feldspar, an alternative to lithium carbonate to supply Li2O to ceramic glazes. Contains up to about 8% Li2O.
Materials Spodumene Concentrate
Materials CGS 3.1 Spodumene
Materials SC 1.1 Spodumene
Materials SC 1.2 Spodumene
Materials UGS Spodumene
Materials FSC 2.1 Spodumene
Typecodes Feldspar
The most common source of fluxes for high and medium temperature glazes and bodies.


Hardness (Moh) 6-5-7
Frit Softening Point 1420C
Density (Specific Gravity) 3.2
By Tony Hansen
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