 | | Journal (article/letter/editorial) | | the coronadite group from Třebíč - Borovina and Řípov (Moravia, Czech Republic) Jakub Jirásek1)*, Dalibor...137-144 ISSN 2570-7337 Abstract Localities Třebíč - Borovina (GPS N 49° 12.400‘ E 015° 51.280‘) and nearby...gneisses and migmatites close to the contact with the Třebíč Pluton belong to the Moldanubian Zone of the Bohemian...production of Fe-ore from the weathering zone at Třebíč - Borovina, as well as production of mineral raw-material...deposited in the museum collections (Museum Vysočina Třebíč, National Museum in Prague - Natural History |  | | Journal (article/letter/editorial) | | Nanjing University, Nanjing 210093, People’s Republic of China Abstract Silicates and phosphates are...Petrological Background The Nanping pegmatite district is located in the southeastern margin of the Caledonian...1b). Zone I is mainly composed of medium-grained quartz, muscovite and fine albite. In this zone, beryl...beryl is abundant and occurs in muscovite and quartz. The beryl forms euhedral to subhedral crystals varying...and facies IIb (greenish muscovite with 10 vol.% quartz and 30 vol.% albite). Euhedral white beryl crystals |  | Černý, P., Chapman, R., Staně, J., Nová, M., Baadsgaard, H., Rieder, M., Kavalová, M., Ottolini, L. (1995) Geochemical and structural evolution of micas in the Rožná and Dobrá Voda pegmatites, Czech Republic. Mineralogy and Petrology, 55 (1) 177-201 doi:10.1007/bf01162587 | Journal (article/letter/editorial) | | micas in the Ro nfi and Dobrfi Voda pegmatites, Czech Republic P. (~ern~ 1, J. Stan[k 2, M. Novfik .1, H....and Geochemistry, Masaryk University, Brno, Czech Republic 3Department of Geology, University of Alberta...Geological Sciences, Charles University, Praha, Czech Republic 5Department of Mineralogy, Geochemistry and...Crystallography, Charles University, Praha, Czech Republic 6CNR Centro di Studio per la Cristallochimica...Mineralogy and Petrography, Moravian Museum, Brno, Czech Republic 178 P. Cern) et al. Zusammenfassung Geochemische |  | Selway, Julie B., Novak, Milan, Hawthorne, Frank C., Cerny, Petr, Ottolini, Luisa, Kyser, T. Kurtis (1998) Rossmanite, ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)4, a new alkali-deficient tourmaline; description and crystal structure. American Mineralogist, 83 (7) 896-900 doi:10.2138/am-1998-7-822 | Journal (article/letter/editorial) | | species from near RoZnii, western Moravia, Czech Republic. It forms pale pink columnar crystals about...systematicexamination of tourmalines from several Czech and Moravian pegmatites,we encountered anotherdistinct...CzechnefiuU'lii. (mica-schist zone) in the Czech Republic (Nov6k 1992; t E-mail:frank-hawthorne@umanitoba...wide and is exposed on two hills, Hradisko and Borovina, which are separatedby a fault, Rossmanitewas...core-margin zone; (6) albitelepidolite unit; (7) quartz core (Novrik 1992; Cerny et al. 1995;Nov6k and |  | | Journal (article/letter/editorial) | | evidently due to the incompatibility of Mg spinels with quartz in regionally metamorphosed assemblages. The Zn...wurden auch in den Spinellen aus Nov~ Ves und Borovina gefunden, so dug es scheint, als ob die Marmore...associated wall rock alteration in the Oster-Silvberg district, Central Sweden. Sveriges Geol. Unders6kn., Ser |  | | Book | | crystalline forms of pure chemical compounds (e.g. quartz, Si0 2 ; calcite, CaC0 3 magnetite, Fe3 4 ), or...are common to both groups. MINERALS AND ROCKS Quartz Olivine Rock-salt Felspar Magnetite Iron pyrites...application of the simple tests described in mineralogy Quartz dioxide or any text-book of 1 . is the commonest...presence of minute quantities of some impurity. Quartz is very hard, scratching glass easily, and its...It is totally unaffected 1. A simple crystal of quartz, consisting of a hexa- Fig. gonal prism, terminated |  | | Book (volume) | | mountains of Egypt, suggest¬ ing to him that this region was once upon a time covered by sea. But some thinkers...distinguished six periods in the history of this region, but these periods have nothing in common with...to subdivide the Upper Cretaceous of the Volga region, into three parts (1833), and Rul'e did the same...in the lake-seas of the Black Sea-Caspian 35 region in the Pliocene. The evolution of the pelecypod...species which live in various ways in the given region. radiation often takes place very rapidly. This |  | | Book | | étoile, de l'eau (flocons de neige). Cristal de quartz, asymétrique. grad, le g_éologue Sobolev qui,...généralement des grains incolores de quartz et des paillettes de mica. Le quartz et le mica sont des minéraux...diverses. On trouve souvent sous forme de druses le quartz, la calcite, la fluorine, la barytine etc. On rencontre...produisent de grands cristaux, comme, par exemple, le quartz. " En minéralogie et en pétrographie, on désigne...diamant en possède plusieurs et que le clivage du quartz est impossible. La dureté, c'est-à-dire la résistance |  | | Book | | less resistant than orthoclase; muscovite and quartz are both very resistant but muscovite is readily...physical disintegration and is then more stable than quartz particles of similar size. Although the rates of...and least where it already consists largely of quartz and/ or clay minerals which are relatively stable...variable amounts of 1:1 lattice (kaolinitic) clay and quartz or other very insoluble minerals of sand size,...951 = 1.1 Ta 17.8 Scotland Northern Ireland Republic of Ireland British Isles 20,636 80.6 4.4 8.2 |
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