“pyrophyllite”的意思、由来-百科全书

pyrophyllite

mineral

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. Talclike foliated masses occur in the Urals, in Switzerland, and in other localities.

Pyrophyllite has long been used in slate pencils and tailor's chalk and was carved by the ancient Chinese into small images and ornaments. It has good insulating properties, and because it does not become fluid when fired, it is more useful than talc in refractory applications.

词条	pyrophyllite
释义	pyrophyllite mineral 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. Talclike foliated masses occur in the Urals, in Switzerland, and in other localities. Pyrophyllite has long been used in slate pencils and tailor's chalk and was carved by the ancient Chinese into small images and ornaments. It has good insulating properties, and because it does not become fluid when fired, it is more useful than talc in refractory applications.
随便看	Chatham Strait Chatino Chatou chatoyance Sir George, Baronet Burns Sir George, Baronet Carteret Sir George, Baron Porter of Luddenham Porter Sir George Biddell Airy Sir George Burns, Baronet Sir George Carteret, Baronet Sir George Cayley, 6th Baronet Sir George Darwin Sir George Downing Sir George Etherege Sir George Eulas Foster Sir George Everest Sir George Gabriel, 1st Baronet Stokes Sir George Gabriel Stokes, 1st Baronet Sir George Gilbert Scott Sir George Goldie Sir George Grey Sir George Grove Sir George Henschel Sir George Houston Reid Sir George Hubert Wilkins