Ryolite S1

Alternate Names: Riolite S1

Oxide	Analysis	Formula
CaO	0.10%	0.01
MgO	0.10%	0.02
K2O	7.00%	0.61
Na2O	0.50%	0.07
TiO2	0.09%	0.01
Al2O3	12.50%	1.00
SiO2	77.00%	10.45
Fe2O3	0.90%	0.05
LOI	1.75%	n/a
Oxide Weight		801.23
Formula Weight		815.50

Notes

Ryolite is a rock containing as essential minerals: quartz (50%), potassium feldspar (30%), kaolinite (12%) and accessory minerals (8%).

Ryolite is currently used in the ceramics industry for the production of red single-fired tiles and in the refractory industry. With chemical and physical properties similar to those of Maffei pegmatite used in single-fired whiteware, ryolite is utilized for its special characteristic of being totally without organic impurities. After being properly crushed and sieved, ryolite is also used in single-fired whiteware; in mixtures with aplite, it forms eutectic points at lower temperatures than either component singly, without altering the sintering range. Research is underway to investigate the possible applications of ryolite in porcelain stoneware.

Riolite S is similar but in a coarser size.
The Maffei Group ryolite quarry is an open-pit mine.

Related Information

Links

Minerals	Quartz Quartz is the most abundant mineral on earth, it is the main crystalline mineral form of silica (SiO
Minerals	K-Feldspar Most common feldspars contain both sodium and potassium. The term K-Feldspar designates one where th
Minerals	Kaolinite The most fundamental clay mineral. This mineral is found in nature in its purest form as kaolin. How
Typecodes	Aluminum Silicate Materials not classifiable as commonly known aluminum silicates. For example, kaolin is a common aluminum silicate.

Data

Bulk Density g/cc (Packed)	1.4
Hardness (Moh)	5-6
Ultimate Particle Size Distribution	0-6mm
Density (Specific Gravity)	2.4
pH for dry powder	8-9

By Tony Hansen
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