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The following list of mines in the Philippines is subsidiary to the Lists of mines in Asia article and Lists of mines articles. This list contains working, defunct and future mines in the country and is organised by the primary mineral output(s) and province. For practical purposes stone, marble and other quarries may be included in this list.
This is the case when K 2 O + Na 2 O + CaO > Al 2 O 3 > K 2 O + Na 2 O. Such granites are described as normal or metaluminous. Granites in which there is not enough aluminum to combine with all the alkali oxides as feldspar (Al 2 O 3 < K 2 O + Na 2 O) are described as peralkaline, and they contain unusual sodium amphiboles such as riebeckite.
The other often used method of finishing marble is to polish with oxalic acid (H 2 C 2 O 4), an organic acid. The resulting reaction is as follows: CaCO 3 (s) + H 2 C 2 O 4 (l) → CaC 2 O 4 (s) + CO 2 (g) + H 2 O(l) In this case the calcium oxalate (CaC 2 O 4) formed in the reaction is washed away with the slurry, leaving a surface that has ...
α-quartz crystallizes in the trigonal crystal system, space group P3 1 21 or P3 2 21 (space group 152 or 154 resp.) depending on the chirality. Above 573 °C (846 K; 1,063 °F), α-quartz in P 3 1 21 becomes the more symmetric hexagonal P 6 4 22 (space group 181), and α-quartz in P 3 2 21 goes to space group P 6 2 22 (no. 180).
Carrara marble, or Luna marble (marmor lunense) to the Romans, is a type of white or blue-grey marble popular for use in sculpture and building decor. It has been quarried since Roman times in the mountains just outside the city of Carrara in the province of Massa and Carrara in the Lunigiana , the northernmost tip of modern-day Tuscany , Italy.
Křtiny marble (křtinský mramor) from Křtiny, Blansko District: grey, rosy, reddish [f] Slivenec marble (slivenecký mramor), from Barrandien, Slivenec and Radotín (Cikánka, Horní Kopanina, Na Špičce, Hvížďalka quarries), Prague: reddish, rose, brown, grey, spotted with veins [g]
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