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Information @ a Glance

Contents on the CD Rom

• Pyrophyllite is a phyllosilicate mineral species belonging to the clay family and composed of aluminium silicate hydroxide AlSi2O5OH.
• It occurs in two more or less distinct varieties, namely, as crystalline folia and as compact masses; distinct crystals are not known.
• Pyrophyllite occurs in phyllite and schistose rocks, often associated with kyanite, of which it is an alteration product.
• Pale green foliated masses, very like talc in appearance, are found at Beresovsk near Yekaterinburg in the Urals, and at Zermatt in Switzerland.
• Illite is the dominant clay in the upper part of the deposit. It rapidly diminishes in the lower sections where there is an increase in kaolinite, alloysite, and pyrophyllite.
• In the grinding process of Pyrophyllite, some effects such as delamination, gliding and folding of the layers, and decrease in particle size were detected by SEM and XRD, resulting in a large increase in specific surface area.
• Clays in Las Aguilas Formation were characterized by mechanical, X-ray powder diffraction, chemical, differential thermal, dilatometric, thin section, and electron microscopy analyses.
•  Most samples are strongly cemented with Fe203, and their dispersion is sometimes very difficult.
• Mechanical size analyses may therefore yield lower percentages of the clay fraction than is actually the case.
• The Newfoundland government assumed control of the property under the Undeveloped Mineral Area Act of 1952.
• It was reopened in 1956 by Newfoundland Minerals Limited, a subsidiary of a company that later became the American Olean Tile Company.
• Infrared spectroscopic observations of the incorporation of CO2 into pyrophyllite that has been heated between 200ºC and 1250ºC for periods of 15 min, 1 h and 5 days.
• It is added to clay to reduce thermal expansion when firing but it has many other industry uses when combined with other compounds, such as in insecticide and for making bricks.
• Historically pyrophyllite has been used for carving statues and ornaments owing to its relative ease of machinability.
• Pyrophyllite used in Ceramic formulations e.g. tile and refractory.

• The Mineral Pyrophyllite
• Pyrophyllite Background
• Classification of pyrophyllite
• Pyrophyllite History
• Pyrophyllite

• General Pyrophyllite Information

Production

• Mineral Industry Survey
• Origin of acid fluids in the caywayan sector backman in the geo thermal production
• Pyrophyllite Occurrences in the Coxheath area, Cape BretonIsland
• Origin of the Pyrophyllite
• Aspects of Mining in Newfoundland & Labrador

• Geoscience Newsletter
• Continuing the Long Tradition of Mining on the Avalon Peninsula
• Investigation of Ni Sorption on Pyrophyllite
• In situ impedance spectroscopy on pyrophyllite and CaCO3 at high pressure and temperature
• Spectral Unmixing of aster Data
• Talc and Pyrophyllite

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