Mineral resources of Alaska, report on progress of investigations in 1925. Mineral industry of Alaska in 1925 and administrative report
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Mineral resources of Alaska, report on progress of investigations in 1927. Mineral industry of Alaska in 1927 and administrative report
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Mineral resources of Alaska, report on progress of investigations in 1930. Mineral industry of Alaska in 1930 and administrative report
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Mineral resources of Alaska, report on progress of investigations in 1931. Mineral industry of Alaska in 1931 and administrative report
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Mineral resources of Alaska, report on progress of investigations in 1932. Mineral industry of Alaska in 1932
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Mineral and fuel resources, report on progress of investigations in 1933. Mineral industry of Alaska in 1933
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Mineral resources of Alaska, report on progress of investigations in 1934. Mineral industry of Alaska in 1934
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Mineral resources of Alaska, report on progress of investigations in 1935. Mineral industry of Alaska in 1935
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Mineral industry of Alaska in 1936
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Mineral industry of Alaska in 1937
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Mineral resources of Alaska, report on progress of investigations in 1938. Mineral industry of Alaska in 1938
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Mineral industry of Alaska in 1939
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Mineral industry of Alaska in 1940
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Mineral industry of Alaska in 1941 and 1942
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Wollastonite : a versatile industrial mineral
Wollastonite is a chemically simple mineral named in honor of English mineralogist and chemist Sir W.H. Wollaston (1766–1828). It is composed of calcium (Ca) and silicon and oxygen (SiO2, silica) with the chemical formula CaSiO3. Although much wollastonite is relatively pure CaSiO3, it can contain some iron, magnesium, manganese, aluminum, potassium, sodium, or strontium substituting for calcium in the mineral structure. Pure wollastonite is bright white; the type and amount of impurities can produce gray, cream, brown, palegreen, or red colors.
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