The American Journal of Science, Том 204J.D. & E.S. Dana, 1922 |
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Стр. v
... Crystal ; by R. W. G. WYCKOFF ,. ART . XVIII . - The Symmetry and Crystal Structure of Zinc Bromate Hexahydrate , Zn ( BrO ... Crystals ; by E. T. WHERRY , 237 ART . XXIV . - A New Trilobite Appendage ; by T. H. CLARK , 245 ART . XXV ...
... Crystal ; by R. W. G. WYCKOFF ,. ART . XVIII . - The Symmetry and Crystal Structure of Zinc Bromate Hexahydrate , Zn ( BrO ... Crystals ; by E. T. WHERRY , 237 ART . XXIV . - A New Trilobite Appendage ; by T. H. CLARK , 245 ART . XXV ...
Стр. 1
... crystals have always been used in determining the melting point of orthoclase . The natural crystals never have the theoretical composition KAlSi , O , but always contain a considerable amount of albite and sometimes other mole- cules ...
... crystals have always been used in determining the melting point of orthoclase . The natural crystals never have the theoretical composition KAlSi , O , but always contain a considerable amount of albite and sometimes other mole- cules ...
Стр. 2
... crystals are present in smaller amount , they grow as more discrete grains , though retaining skeletal ten- dencies and appearing usually as rectangular crosses . Finally , when formed at a temperature of 1400 ° or higher the crystals ...
... crystals are present in smaller amount , they grow as more discrete grains , though retaining skeletal ten- dencies and appearing usually as rectangular crosses . Finally , when formed at a temperature of 1400 ° or higher the crystals ...
Стр. 3
... crystals as grown in a mixture of composition KAISI O. The rounded leucite crystals , obtained at higher temper- atures , may have a diameter as great as 0.025 mm . and are surrounded by a rim of strained glass which is observed as a ...
... crystals as grown in a mixture of composition KAISI O. The rounded leucite crystals , obtained at higher temper- atures , may have a diameter as great as 0.025 mm . and are surrounded by a rim of strained glass which is observed as a ...
Стр. 4
... crystals . After obtaining these results we then proceeded to determine the temperature of incongruent melting more accurately and also to fix the temperature at which the leucite crystals disappear and the mass is entirely liquid ...
... crystals . After obtaining these results we then proceeded to determine the temperature of incongruent melting more accurately and also to fix the temperature at which the leucite crystals disappear and the mass is entirely liquid ...
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ammonium chloride appears aragonite atoms bands barium basalt Bayer's beds biotite bowlders brachiopods calcite canine cent chemical chloride clays colloidal color composition compound cone cone-in-cone Cope crystalline crystals deposits described determined Devonian diameter Dinictis Eocene evidence fanglomerates fault plane fauna feet feldspar formation fossils gabbro genus Geological Glass gneiss granite graptolites Holotype Hyrachyus igneous indices John Day JOUR lake Laue photographs layer length leucite limestone liquid lower Marsh mass material measurements melting method miles minerals Miocene mixture molar Nimravus Nimravus debilis occur orthoclase oxide Payette platycopis Pogonodon Pogonodon davisi posterior premolars present probably quartz lode quartzite Reagan refraction region ridge rocks salt sandstone SCI.-FIFTH SERIES sediments serrulidens shales silicates skull solution space groups sparagmite species specimen stibnite strontium structure surface symmetry temperature thickness tion Triassic trilobites U. S. Geol upper zone