 | | Journal (article/letter/editorial) | | 右について A, Study -on White Mine, Nagano Tourmaline from the Kanakura Prefecture 武 司 秀 央 (Hideo Takeshi)...定 を行 つ た と ころ,一 にX線 粉 末 写 眞 に よる 種 の 電 気 石(tourmaline)で うること を認 めた ので 以 下 これ につ い て 報 告 す る。 1.顯 |  | | Journal (article/letter/editorial) | | structure of an alkali cation-deflcient, vanadium tourmaline has been refined (R : 0.Ml for 2727 rntensitydata)...evaluatethe effectsof tourmaline composition on structural distortion. V-tourmaline, (Nao*Ca.r"Mgo.,rIGor)(Mg...membersof the tourmaline group, most notably a recently refined aluminousdravite. Analysis of tourmaline-groupstructural...betweenthe sizesof the 9b and l8c octahedrain refined tourmaline structures and the extensive and possibly complete...solution. In view of the structural flexibility of tourmaline and the easeof proton exchangeto maintain charge |  | | Journal (article/letter/editorial) | | Springer-Verlag 1977 Coupled Substitutions in the Tourmaline Group Franklin F. Foit, Jr. and Philip E. Rosenberg...Abstract. Statistical analysis of 136 natural tourmaline compositions from the literature reveals the...(BO3)3Si6018(OH)4, and a new series within the tourmaline group, ~t'~l-xl~-3 ~'+ ~,3+E,3+ • ( B O 3 ) 3...Jr. and P.E. Rosenberg Introduction Although tourmaline is by far the most common of the borosilicates...difficulty in establishing a chemical formula for tourmaline (Riggs, 1888; Penfield and Foote, 1899; Schaller |  | | Book | | major producing districts, or a representative district if there are many. We name the chief mining companies...supply must come not merely from one district but from a single mine. Thus the physical properties of many...eclipsing the mineral magnesite in some areas; the trona mine rather than the Solvay plant is now the main source...phosphate rock. Kaolin is shipped from Georgia to Japan, talc from Montana to Belgium, barite from Ireland...use more asbestos than A/C products, whereas in Japan A/C sheets and pipes account for over two-thirds |
|
