sillimanite वाक्य
उदाहरण वाक्य
मोबाइल
- At higher temperatures and pressures, andalusite may convert to sillimanite.
- Unusual minerals found in the volcanics include andalusite, muscovite, sillimanite and tourmaline.
- Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph.
- Other possible minerals formed at dry conditions include sapphirine, spinel, sillimanite, and osumilite.
- Kyanite is triclinic, while andalusite and sillimanite are both orthorhombic and belong to the dipyramidal point group.
- These minerals, known as index minerals, include sillimanite, kyanite, staurolite, andalusite, and some garnet.
- The Angara-Kan terrane also includes two pyroxene plagioclase and one garnet-biotite-sillimanite-cordierite gneisses.
- In a few cases rocks are fused and in the dark glassy product minute crystals of spinel, sillimanite and cordierite may separate out.
- The mineral occurs as exsolution lamellae and particles in rutile, coexisting with kyanite, sillimanite, and tourmaline in a highly metamorphosed gneiss.
- Andalusite is stable at low pressure, kyanite is stable at high pressure but relatively low temperature and sillimanite is stable at high temperature.
- The aluminosilicates are a group of three minerals kyanite, andalusite, and sillimanite which share the chemical formula Al 2 SiO 5.
- With increasing temperature and pressure garnet appears, and then kyanite ( at relatively high pressure ) or sillimanite ( at relatively high temperature ).
- Explored in 1862, researchers found there a central vault containing a fairly prestigious funerary furniture : axes, pearls, flint tools and sillimanite.
- The geology consists mainly of grey or light orange leucogranite and orthogneiss rich in biotite, sillimanite and cordierite with alternating bands of felsic and mafic material.
- It produces / sells six heavy minerals namely ilmenite, rutile, zircon, monazite, sillimanite, and garnet as well as various value added products.
- Felsic rocks in these terranes contain sillimanite, kyanite, coesite, orthoclase and pyroxene, and are rare, peculiar rocks formed by an unusual tectonic event.
- The High Himalayan Crystalline units ( HHC ) are mainly composed of kyanite-to sillimanite-grade gneisses intruded by High Himalayan leucogranites at structurally higher levels.
- Ovoid plagioamphibolites are present among schistose plagioamphibolites of the Polmostundrovsky suite and have been dated at ~ 2.6 Ga, indicative of andalusite-sillimanite facies metamorphism.
- Among these may be mentioned cordierite and sillimanite gneisses, andalusite and kyanite mica-schists, and those schistose calcite-silicate rocks that are known as cipolins.
- Where the schists of sedimentary origin have been pierced by these igneous intrusions, they are charged with contact minerals such as sillimanite, cordierite, kyanite and andalusite.
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