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INTRODUCTION The term marble is applied commercially to any limestone or dolomite taking polished. Marble is a metamorphic rock composed of recrystallized calcite or dolomite. Marble is formed from limestone by heat and pressure in the earth’s crust. ... Impurities present in the limestone during recrystallizaton affect the mineral composition of the marble that forms. ... At extremely high temperatures, rarer calcium minerals, such as larnite, monticellite, and rankinite, form in the marble. ... The minerals that result from impurities give marble a wide variety of colors. Marble does not split easily into sheets of equal size and must be mined carefully. ... Calcite (marble) deforms readily by plastic flow even at low temperatures. ... In calcite (marble) the twinning plane is the flat rhombohedron; in dolomite twinning is markedly less common and the plane is the steep rhombohedron. ... This makes the rock, particularly the pure calcite (not dolomite) marble, well suited for building purposes. ... The surface of marble crumbles readily when exposed to a moist, acid atmosphere, but marble is durable in a dry atmosphere and when protected from rain.
Sulfuric acid is a strong acid, that is, in aqueous solution it is largely changed to hydrogen ions and sulfate ions. Each molecule gives two H+ ions, thus sulfuric acid is dibasic. Dilute solutions of the sulfuric acid show all the behavior characteristics of acids. ... From sulfuric acid one can prepare both normal salts containing the sulfate group and acid salts containing the hydrogen sulfate group.
Approximate Word count = 1117
Approximate Pages = 4.5
(250 words per page double spaced)
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