What is Agalmatolite stone?
What is Agalmatolite stone?
[‚a·gəl′mad·əl‚īt] (geology) A soft, waxy, gray, green, yellow, or brown mineral or stone, such as pinite and steatite; used by the Chinese for carving images. Also known as figure stone; lardite; pagodite.
Where is pyrophyllite mined?
pyrophyllite, very soft, pale-coloured silicate mineral, hydrated aluminum silicate, Al2(OH)2 Si4O10, that is the main constituent of some schistose rocks. The most extensive commercial deposits are in North Carolina, but pyrophyllite is also mined in California, China, India, Thailand, Japan, Korea, and South Africa.
What is the chemical formula pyrophyllite?
2.1. 76 PYROPHYLLITE
| Names: pyrophyllite, aluminum silicate hydroxide | CAS #: 12269-78-2 |
|---|---|
| Chemical formula: AlSi2O5OH (Al2O34SiO2H2O) | Functionality: OH |
| Chemical composition: SiO2 − 66-75%, Al2O3 − 18-28%, Fe2O3 − 0.5-0.7%, TiO2 − 0.4% | |
| PHYSICAL PROPERTIES | |
| Density, g/cm3: 2.65-2.9 | Mohs hardness: 1-2.5 |
What is pyrophyllite used for?
Chemistry: AlSi2O5OH , Aluminum Silicate Hydroxide. Uses: As a refractory mineral, as a filler for rubber, paints and insecticides, as an ornamental stone, as a component of ceramics and as mineral specimens.
What is the meaning of pyrophyllite?
Definition of pyrophyllite : a soft usually white or greenish mineral that is a hydrous aluminum silicate, resembles talc, occurs in a foliated form or in compact masses, and is used especially in ceramic wares.
What does pyrophyllite look like?
The color of both varieties is white, pale green, greyish or yellowish; they are very soft (hardness of 1.0 to 1.5) and are greasy to the touch. The specific gravity is 2.65 – 2.85. The two varieties are thus very similar to talc.
How much is talc worth?
Unit values for cut or sawed talc ranged from $517 per ton to $1,241 per ton for shipments exceeding 100 tons. The average unit value for all shipments, including those of 100 tons or less, was $60 per ton for crude talc; $100 per ton for ground talc; and $997 per ton for cut or sawed talc.
How do you identify pyrophyllite?
The color of both varieties is white, pale green, greyish or yellowish; they are very soft (hardness of 1.0 to 1.5) and are greasy to the touch. The specific gravity is 2.65 – 2.85….
| Pyrophyllite | |
|---|---|
| Luster | Pearly to dull |
| Streak | white |
| Diaphaneity | Translucent to opaque |
| Specific gravity | 2.65 – 2.9 |
What is the hardness of pyrophyllite?
| Pyrophyllite | |
|---|---|
| Crystal habit | Compact spherulitic aggregates of needlelike radiating crystals; as fine grained foliated laminae, granular, massive |
| Cleavage | [001] Perfect |
| Tenacity | Flexible inelastic |
| Mohs scale hardness | 1.5-2 |
