Thursday, February 24, 2011

Redart

An iron-rich clay consisting of clay/shale
deposits from a prehistoric lake bed.
Contains 40% illite, 10% kaolinite, 7% iron oxide,
and 15% mixed layered clays.
Manufactured by Cedar Heights Clay Division
of Resco Products Inc.; comes from Ohio.
Relatively low plasticity, but good brick-red color
(best color at c/02 [IMC]).

Analyses:
Obstler: % 0.4 Na2O 4.07 K2O 1.55 MgO
0.23 CaO 16.41 Al2O3 64.27 SiO2 1.06 TiO2
7.04 Fe2O3 4.92 LOI
Cooper & Royle: (Appendix 8) % 0.40 Na2O
4.07 K2O 1.55 MgO 0.23 CaO 16.41 Al2O3
64.27 SiO2 1.06 TiO2 7.04 Fe2O3 4.78 LOI
Chappell: (slight variance from C&R)
% 4.07 Na2O 0.40 K2O 1.55 MgO 0.23 CaO
16.41 Al2O3 64.24 SiO2 1.06 TiO2 7.04
Fe2O3 4.78 LOI
Cushing: (probable error in SiO2) % 0.40 Na2O
4.07 K2O 1.55 MgO 0.23 CaO 16.4 Al2O3
54.3 SiO2 1.06 TiO2 7.04 Fe2O3 0.17 P2O5
4.78 LOI 0.24 SO3
Tichane (AG, TCB, CB): % 0.4 Na2O 4.1 K2O
1.6 MgO 0.2 CaO 16.4 Al2O3 64.3 SiO2 1.1 TiO2
7.0 Fe2O3 4.8 LOI
IMC: % 0.38 Na2O 4.15 K2O
1.59 MgO 0.26 CaO 15.51 Al2O3 64.95 SiO2
1.09 TiO2 7.05 Fe2O3 0.22 P2O5 4.80 LOI

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