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Tectosilicates
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131	60 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2007 had an estimated value of about $45 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2008-01-31 14:51:48 Feldspar Nepheline syenite Syenite Industrial mineral Mica Petrology Crystallography Tectosilicates
132	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2009 was valued at about $36 million. The three leading producers accounted for about 57% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2010-01-27 08:36:12 Igneous petrology Feldspar Tectosilicates Nepheline syenite Granite Mica Aluminium Petrology Chemistry Crystallography
133	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2013 was valued at about $37.7 million. The three leading producers accounted for about 87% of p Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2014-03-07 14:53:44 Dielectrics Feldspar Tectosilicates Nepheline syenite Glass recycling Recycling Mica Glass Granite Chemistry Petrology Crystallography
134	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2011 was valued at about $43 million. The three leading producers accounted for about 71% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2012-01-24 10:53:56 Business Feldspar Tectosilicates Glass recycling Nepheline syenite Mica Glass Recycling Ceramic Chemistry Dielectrics Matter
135	56 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2008 had an estimated value of about $36 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2009-01-29 14:39:42 Feldspar Tectosilicates Nepheline syenite Mica Granite Aluminium Petrology Chemistry Crystallography
136	54 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2012 was valued at about $39 million. The three leading producers accounted for about 83% of the Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2013-01-29 11:09:23 Feldspar Tectosilicates Recycling Mica Nepheline syenite Glass recycling Granite Aluminium Chemistry Petrology Crystallography
137	2006 Minerals Yearbook FELDSPAR AND NEPHELINE SYENITE U.S. Department of the Interior U.S. Geological Survey Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2007-09-17 12:57:33 Nepheline syenite Tectosilicates Industrial mineral Leucite Unimin Feldspar Syenite Aplite Granite Petrology Igneous petrology Crystallography
138	2008 Minerals Yearbook FELDSPAR U.S. Department of the Interior U.S. Geological Survey Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2012-08-15 09:14:11 Igneous rocks Economic geology Feldspathoid Nepheline syenite Tectosilicates Unimin Industrial mineral Feldspar Leucite Petrology Crystallography Igneous petrology
139	62 FELDSPAR (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: U.S. feldspar production in 2005 had an estimated value of about $44 million. The three leading producers accounted for abou Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2006-01-18 13:31:31 Tectosilicates Igneous petrology Nepheline syenite Granite Mica Recycling Petrology Crystallography Feldspar
140	FELDSPAR AND NEPHELINE SYENITE By Michael J. Potter Feldspar Feldspars are alumino-silicates with varying amounts of sodium, potassium, or calcium. In glassmaking, the largest end use, feldspar provides alumina for impro Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 1997-07-21 07:10:39 Economic geology Nepheline syenite Industrial mineral Tectosilicates Unimin Aplite Syenite Pegmatite Feldspar Petrology Igneous petrology Igneous rocks

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