Åkermanite
Melilite, Silicate minerals, Calcium, Magnesium, Silicon, Oxygen, Metamorphism, Limestone, Dolostone
978-613-9-77196-7
613977196X
132
2013-01-10
45.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Åkermanite (Ca2Mg[Si2O7]) is a melilite mineral of the sorosilicate group, containing calcium, magnesium, silicon, and oxygen. It is a product of contact metamorphism of siliceous limestones and dolostones, and rocks of sanidinite facies. Sanidinite facies represent the highest conditions of temperature of contact metamorphism and are characterized by the absence of hydrous minerals. It has a density of 2.944 g/cm3. Åkermanite ranks a 5 or 6 on the Mohs scale of mineral hardness, and can be found grey, green, brown, or colorless. It has a white streak and a vitreous or resinous luster.
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地球科学
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