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Feldspar - Wikipedia, the free encyclopedia
Feldspars (KAlSi 3 O 8 - NaAlSi 3 O 8 - CaAl 2 Si 2 O 8 ) are a group of rock-forming tectosilicate minerals which make up as much as 60% of the Earth's crust. Feldspars crystallize fro...
en.wikipedia.org/wiki/Feldspar
Celsian - Wikipedia, the free encyclopedia
Celsian is an uncommon feldspar mineral, barium aluminosilicate , BaAl 2 Si 2 O 8 . The mineral occurs in contact metamorphic rocks with significant barium content. Its crystal system is mono...
en.wikipedia.org/wiki/Celsian
has taken place in the crystal structure of barium-feldspars on proceed- ... conclusion was reached by taking the three barium-feldspars of known ...
www.minsocam.org/ammin/AM38/AM38_845.pdf
in close association with barium feldspar and corundum has been con- ... H. Gabbroic dike where harmotome, corundum and barium feldspars were found. ...
www.minsocam.org/ammin/AM24/AM24_540.pdf
The barium feldspars are very interesting materials to study, both for their unique properties and ... ing barium feldspar in the different polymorphs. The ...
www.springerlink.com/index/Q5Q0W8145485X370.pdf
Barium-feldspar, hyalophane, is reported from Lower Ordovician shales of the Oslo Region. The feldspars occur in beds with pseudomorphs after barite which ...
search.datapages.com/data/doi/10.1306/74D7279D-2B21-11D... search.datapages.com/data/doi/10.1306/74D7279D-2B21-11D7-8648000102C1865D
He suspected the presence of the rare barium-feldspars celsian and paracelsian, which Were discovered in the same mine in 19111,2. We found the optical properties of the mineral differed from those of any known barium mineral, and micro-chemical analysis has now shown that it is a new barium-feldspar and the first...
www.nature.com/nature/journal/v154/n3906/abs/154336c0.h... www.nature.com/nature/journal/v154/n3906/abs/154336c0.html
"This barium feldspar contains garnet and tourmaline as impurity. Its spectrum displays a very well defined and intense 1.9µ water feature with accompanying 1.4µ, 2.2µ, and 2.36µ features which are surprisingly weak."
speclab.cr.usgs.gov/spectral.lib04/DESCRIPT/celsian.HS2... speclab.cr.usgs.gov/spectral.lib04/DESCRIPT/celsian.HS200.html
Strontium feldspar is a ternary inorganic oxide composite generally known as barium feldspar or celsian (BaO.Al 2 O 3 .2SiO 2 ) wherein Ba is replaced by Sr. Strictly stated, barium feldspar or celsian represents a region in the equilibrium diagram of a BaO--Al 2 O 3 --SiO 2 system where BaO.Al 2 O 3 .2SiO 2...
www.freepatentsonline.com/5747396.html
An airbag copmrising crystal gels is disclosed. The crystal gel comprises one or more block copolymers having at least one crystalline midblock and high levels of a plasticizer. The midblock segment h ... US Patent References: ... 4136699 Absorbent article with adhesive strip Collins 128/290...
www.freepatentsonline.com/6627275.html
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