Records of the Geological Survey of India, Volume 76, Parts 9-14Government of India, 1947 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 5
... phlogopite is less transparent . Gas bubbles , inclusions and cracks reduce the trans- parency . Some white or " silver " mica has a pearly lustre . When a small source of light is viewed through a cleavage plate of phlogopite , it is ...
... phlogopite is less transparent . Gas bubbles , inclusions and cracks reduce the trans- parency . Some white or " silver " mica has a pearly lustre . When a small source of light is viewed through a cleavage plate of phlogopite , it is ...
Page 6
... phlogopite it is parallel to the plane of symmetry . In muscovite the angle between the optic axes is large , 2V ... phlogopite the refractive indices are : -1.540-1.562 , B = 1 · 574 -1.606 , x 1.574-1 · 606 , x - α = 034-044 . The ...
... phlogopite it is parallel to the plane of symmetry . In muscovite the angle between the optic axes is large , 2V ... phlogopite the refractive indices are : -1.540-1.562 , B = 1 · 574 -1.606 , x 1.574-1 · 606 , x - α = 034-044 . The ...
Page 21
... Phlogopite has been mined in the past at Heemskirsk , on the west coast of Tasmania . Burma . - Phlogopite has been obtained in small quantities in the ruby mines area near Mogok , and along the Indaw river . Mica pegmatites have also ...
... Phlogopite has been mined in the past at Heemskirsk , on the west coast of Tasmania . Burma . - Phlogopite has been obtained in small quantities in the ruby mines area near Mogok , and along the Indaw river . Mica pegmatites have also ...
Contents
GENERAL | 1 |
THE MODE OF OCCURRENCE | 8 |
Indian provincial production of manganese | 12 |
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abrasive albite alloys amount annual average B. C. Roy belt beryl Beryllium Bihar block mica Bombay braunite Brazil built-up mica Calcutta Canada cent Central Provinces chalcocite chalcopyrite cleavage colour condenser films containing copper copper deposits corundum countries crystals deposits occur district dressed mica electrical exports fair stained feet felspar ferromanganese garnet Geol Geological Survey gonditic granite Heavily stained important inches India insulation iron and steel iron-ores J. A. Dunn known Kodarma limestone lode M. S. Krishnan Madras mainly manganese manganese-ore manufacture metal mica industry mica-schists micanite miles million tons Mineral Resources mines muscovite Mysore obtained ore-bodies oxide pegmatites phlogopite plate production psilomelane pyrolusite quality block quality mica quartz Rajputana recent replacement rocks ruby Sandur schists sheet mica silicate Singhbhum sizes smelting South splittings sulphide surface Surv Survey of India Table thickness United vanadium veins world's