Minsilspar

Oxide	Analysis	Formula
CaO	1.10%	0.15
K2O	2.80%	0.23
Na2O	4.90%	0.62
Al2O3	14.00%	1.07
SiO2	76.80%	9.96
Fe2O3	0.06%	-
LOI	0.30%	n/a
Oxide Weight		776.39
Formula Weight		778.72

Notes

Spruce Pine, NC
A 170 mesh feldspathic sand (sand-spar) product used primarily in the sanitary-ware industry.

Physical Properties
===================
Specific Gravity: 2.6
Refractive Index: 1.53
Mohs Hardness: 6-6.5
Mean Particle Size, microns: 19
Specific Surface Area, sq metre/g: 0.6-0.7
Dry Brightness (Green Filter): 91
Raw color:
pH: 8.2
% Moisture Content: 0.1
Bulk Density (lb/cu. ft)
Loose: 52
Packed: 83

Structure: Crystalline
Particle Shape: Granular

Particle Size: 100 140 170 200 325
% Retained 0.1 0.3 0.4 1.2 10.0
U.S. Sieve Series

Particle Size, Microns: 30 20 10 5
(% finer than) 75% 60% 30% 12%

Related Information

Links

Typecodes	Feldspar The most common source of fluxes for high and medium temperature glazes and bodies.

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