The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 2005 |
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Page 191
... amphibole group , and ( 4 ) the alkali amphibole group . The chemical formulas for selected amphiboles from each of the four compositional groups are given in Table 20 . Table 20 : Chemical Formulas for Selected Amphiboles from the Four ...
... amphibole group , and ( 4 ) the alkali amphibole group . The chemical formulas for selected amphiboles from each of the four compositional groups are given in Table 20 . Table 20 : Chemical Formulas for Selected Amphiboles from the Four ...
Page 192
... Amphiboles have two each of the M1 , M2 , and M4 sites and one M3 site , giving a total of seven octahedral cations in the unit cell . The structure of a monoclinic amphibole viewed down the c crystallographic axis is shown in Figure ...
... Amphiboles have two each of the M1 , M2 , and M4 sites and one M3 site , giving a total of seven octahedral cations in the unit cell . The structure of a monoclinic amphibole viewed down the c crystallographic axis is shown in Figure ...
Page 193
... amphiboles is acicular or prismatic ; however , most of the amphiboles are also known to crystallize in the asbestiform habit . The as- bestiform variety of riebeckite is called crocidolite or blue asbestos . Amosite is a rare ...
... amphiboles is acicular or prismatic ; however , most of the amphiboles are also known to crystallize in the asbestiform habit . The as- bestiform variety of riebeckite is called crocidolite or blue asbestos . Amosite is a rare ...
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albite amphiboles ancient aragonite areas atoms basalt bivalves body calcite calcium called carbonate central centre century cephalopods chemical clay minerals colour common composition contain crust crystals ctenidia cult cultural deities deposits developed dolomite Earth economic eggs electron evaporite example existence facies feldspar Figure garnet gastropods goddess gods grains Hittite human igneous rocks important industrial kaolinite king known layers limestone magma magnetic major mantle cavity marine material mental metamorphic rocks metaphysics Mexican Mexico City mica Michelangelo microscope millimetres Milton mimicry mind Mineralogy modern Molière Mongolia Mongols Moscow myth nature object occur ocean olivine organic originally oxide percent period philosophers physical plagioclase political population pressure produced properties pyroxene quartz reaction region religion religious reprinted result sandstones sedimentary rocks sediments shell silicate smectite snails society species structure Sumerian surface temperature temple tetrahedrons texture tion typically United urban volcanic