 | | Journal (article/letter/editorial) | | Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09596 Freiberg, Germany The Open University...Institute Freiberg for Resource Technology, Halsbrücker Str. 34, 09599 Freiberg, Germany [Received 7...Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, D-09596 Freiberg, Germany DOI: 10.1180/minmag...few studies of UV-excited green luminescence in opal and chert that have elevated uranium concentrations...Chemnitz-Furth Saxony, Germany Chemnitz-Altendorf Saxony, Germany Chemnitz-Hilbersdorf Saxony, Germany Hohenstein-Ernstthal |  | | Journal (article/letter/editorial) | | Elbe Valley near Dresden (Saxony, Germany) KARL-ARMIN TRÖGER Bergakademie Freiberg (Technical University)...Meißer-Building, Zeunerstrasse 12, D-09596 Freiberg, Germany. E-mail: troeger@geo.tu-freiberg.de ABSTRACT:...the northwestern Elbe Valley near Dresden (Saxony, Germany). Geologica Polonica, 67 (1), 135–144. Warszawa...Warszawa. The Upper Cretaceous of the Elbe Valley in Saxony and the erosion outliers west of it mark an Upper...unpublished report for the Geological Survey of Saxony) are exposed west of the Tharandt Forest (Tharandter |  | | Journal (article/letter/editorial) | | Fabulous New Mineral Exhibit Opens in Freiberg, Saxony, Germany O n 20 October 2008, just before the...magnificent new mineral museum opened in Freiberg, Saxony, Germany. The opening of the new terra mineralia...exhibition, part of the Freiberg Technical University Mining Academy (Bergakedemie Freiberg) in the Freudenstein...was constructed in 1168 for the protection of the Saxony silver mining industry, and in 1244 it was also...Wolfgang Thieme photo. Figure 3 (above). Map showing Freiberg, prepared by William Besse. Figure 4 (right). |  | | Journal (issue) | | A., 1815, 'Ueber die Aechtheit der Krystalle,' Freiberg, 63 pp. An early discussion of pseudomorphs. CURRIE...HOFMANN, C. A. S., 1811, 'Handbuch der Mineralogie,' Freiberg, I, pp. 115-117. A brief statement of the nature...stable sol. Here would belong opal after glauberite; chalcedony and opal after thenardite, gypsum, and...chalcedony after gypsum and calcite. The pseudomorphs of opal and chalcedony after gypsum, glauberite, and anhydrite...Werfen, Germany, 15177 Argentite after Silver: I, C 2 Himmelsfiirst, near Freiberg, Saxony, 800; "Peru |  | | Journal (article/letter/editorial) | | Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany Helmholtz-Zentrum Dresden-Rossendorf...Hemholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr...intercalated with macrocrystalline quartz, quartzine, opal-A, opal-CT, cristobalite and/or moganite. In addition...6 (Seifert/Freiberger Präzisionsmechanik, Freiberg, Germany) with Co Kα-radiation in the range 5–80◦ (2θ)...Sensing & Inspection Technologies GmbH, Ahrensburg, Germany) and subsequent Rietveld refinement with Autoquan |  | | Journal (article/letter/editorial) | | Oregon; argyrodite (a silver sulphide germanate), Germany, Bolivia. On the other hand, there are many well...in Colyn region W. of r. Dniepr. ANDREASBERG, Germany, S E Oberharz mountain range, lead-zinc deposit... arsen, hormotone, analcime, desmin. FREIBERG, Saxony, Germany, old famous mineral, classic locality... var. of tetrahedrite occurs in Freiberg region. SW of the Freiberg deposit is found locality Zinnwald:...Annaberg, Johanngeorgenstadt, Schneeberg, all in Saxony. Here have been discovered minerals: annabergite |  | | Book (volume) | | - J . 5. Ctf/’i Stone Eye - 34 37 138 Opal Opalus - *39 Var. — — 1 I2 5 - , * 124...Common Opal k I 3. 0 cuius 4. 4I Mundif Hy- drophan B 142 Haib Opal - 144 Opal • 145...and value. lefs glajs flint the Ealt ;n. Saxony, in of oxyd of cobalt , grains come from quantity...fine yellow tranfparent amber, and thofe from Saxony yellowiftf white. The Eaft Indian borax, and...Some and Peru. are foqnd in England, Italy, Germany, Hungary, Bretagne, &c. The brown kind, Rome dc |  | | Book | | commonly of a quartz composition such as chert, opal and chalcedony, and occur in limestones and serpentines...serpentines. Also, some sorts of chalcedony and opal form nodules which are due to the deposition of different...originate in some other manner, such as limonite and opal — which originate by deposition from water. If water...curved surfaces, shell-like in character (quartz, opal, most silicates). Uneven — the surface is rough...of (5) correspond to the hardness of glass, e.g. opal, (6) and (7) can be scratched by a steel file (chalcedony) | | | Book | | commonly of a quartz composition such as chert, opal and chalcedony, and occur in limestones and serpentines...serpentines. Also, some sorts of chalcedony and opal form nodules which are due to the deposition of different...originate in some other manner, such as limonite and opal which originate by deposition from water. If water...curved surfaces, shell-like in character (quartz, opal, most silicates). Uneven - the surface is rough...of (5) correspond to the hardness of glass, e.g. opal, (6) and (7) can be scratched by a steel file (chalcedony) |  | | | | commonly of a quartz composition such as chert, opal and chalcedony, and occur in limestones and serpentines...serpentines. Also, some sorts of chalcedony and opal form nodules which are due to the deposition of different...originate in some other manner, such as limonite and opal — which originate by deposition from water. If...curved surfaces, shell-like in character (guartz, opal, most silicates). Uneven — the surface is rough...of (5) correspond to the hardness of glass, e.g. opal, (6) and (7) can be scratched by a steel file (chalcedony) |  | | Book | | commonly of a quartz composition such as chert, opal and chalcedony, and occur in limestones and serpentines...serpentines. Also, some sorts of chalcedony and opal form nodul~s which are due to the deposition of different...originate in some other manner, such as limonite and opal which originate by deposition from water. If water...curved surfaces, shell-like in character (quartz, opal, most silicates). Uneven - the surface is rough...of (5) correspond to the hardness of glass, e.g. opal, (6) and (7) can be scratched by a steel file (chalcedony) |  | | Catalog/List | | labeled base. From Freiberg, 12.7 cm Freiberg District, Erzgebirge, Saxony, Germany; by the consignor...Kevin NATIVE Wé4RE. Freiberg i Erzgebirge. Mineral Co SILVER District Saxony. Ward Ger | Ta...This WIRE-SILVER Freiberg with ACANT Freiberg District Erzgebirge. Saxony. Germany specimen is a true...mineral collector. From Freiberg, Freiberg District, Erzgebirge, Saxony, Germany; measures 8.7 cm by 8...a classic mining locality. From Freiberg, Erzgebirge, Saxony, Germany; measures 11 cm by 6.9 cm Ex: |  | | Journal (article/letter/editorial) | | Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09596 Freiberg, Germany; richterjulia1989@gmail...Helmoltz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr...from twelve agate samples were investigated, from Germany (Schlottwitz, St. Egidien, Chemnitz and Zwickau)...(e.g., [4,11–13]). For instance, quartzine, opal-A, opal-CT and/or moganite can be intergrown or intercalated...were analysed (Table 1, Figure 1), five from Saxony/Germany (Chemnitz-Furth, Chemnitz-Altendorf, Schlottwitz |  | | Journal (issue) | | from Schneeberg, East Germany. Richard C. Erd Collection o f the Freiberg Mining Academy. Donald...Photographers: manganite from Ilfeld, Nelly Bariand East Germany (center); Werner Lieber wulfenites from Mezika...Eric Offermann from the Anton mine, Wieden, West Germany. Harold & Erica Van Pelt The color plate is from............................... 18 Freiberg M inin g Academ y Freiberg, East G erm any ............................ 2 0 H arzm useum Wemigerode, East Germany............................................... |  | | Catalog/List | | illustrate different colors, and 37. variegated Wax Opal, 38. Orthoclase ; waxy or name and colorless...(11). common allowing will muscovite (36) opal ex- it brilliancy luster luster is properties...Glance, or molybdenum sulphide, Altenberg, Saxony. 10. Keweenaw Copper, or Peacock Co., N...Ariz. Mass. sulphide, arsenic Pyrites, Freiberg, Saxony. 18. Hematite Red Iron or 19. Magnetite...Joplin, J. Mo. carbonate, Altenberg, Rhineland, Germany. Hill, Ga. corundum, Burma. massive Cryolite | | | | | 106 rock crystal 28; 31 opal, fire 32, 33 tiger’s eye 31 tinzenite91 opal, precious 32, 33 libethinite...libethinite 65, 65 liebigite 53 limonite 37 opal, wood 32, 33 rutile 33, 33 orpiment 18 sagenite 33 sanidine...thenardite 55 thomsonite 117, /2/ thulite 88 onyx 32 opal 32 leucite 76, 109, 111 lithiophilite 65 ludwigite...it has traditionally been accepted that mercury, opal, and chrysocolla, among others, should be grouped...dark gray or brownish black, at Freiberg and Andreasberg in Germany, and also in the United States (Arizona) |  | | Book | | 65 olivine 75, 75 onyx 32 opal 32 opal, fire 32, 33 opal, precious 32, 33 opal, wood 32, 33 orpiment J8...it has traditionally been accepted that mercury, opal, and chrysocolla, among others, should be grouped...dark gray or brownish black, at Freiberg and Andreasberg in Germany, and also in the United States (Arizona)...the best examples come, are the Gern1an ones of Freiberg, Schneeberg, and Marienberg, and the Czechoslovakian...Switzerland. Good crystals ll occur at Freiberg in Saxony, Cavnic in Romania, Schwaz in the Tyrol (Austria) |  | | Catalog/List | | colour, between 7 & 20mm dia. £8 19) CALCITE,Freiberg,Saxony,GermanyWhite hexagonal calcite xtls to 13mm...£565 27) GALENA, Beihilfe Mine, Freiberg-Halsbruke, Saxony, Germany. A druse of very bright mirror-like...location. Ml. £ 12 43) FLUORITE, Gersdorf, Saxony, Germany. Yellow cubes to 35mm. An old specimen ex John... I. 73ct. Gorgious deeprose red. £ 153 56) FIRE OPAL, Brazil. 8mm Round. l.47ct. Bright orange slight | | | Book | | 32 opal 32 leucite 76, 109, 111 libethinite 65, 65 opal, fire 32, 33 opal, precious 32, 33 opal, wood...strictly above. And while it has that mercury, opal, and should be grouped with speaking they should...dark gray or brownish black, at Freiberg and Andreasberg in Germany, and also in the United States (Arizona)...Switzerland. Good crystals I occur at Freiberg in Saxony, Cavnic in Romania, Schwaz in the Tyrol (Austria)...with a metallic lustre, mainly at Siegerland in Germany found and in Bohemia (Czechoslovakia). It |  | | Journal (article/letter/editorial) | | Ruhr-University Bochum, Germany 2 Department of Mineralogy, TU Bergacademy Freiberg, Germany Received March 6...Cretaceous sands of the Kuhfeld-Formation in W Germany, digital images of initial as well as final CL-colours...kaolinite-cement (K) in a Rotliegend-sandstone of NW Germany; f CL-images of the four types of zircons recognized...sample of the Triassic ‘‘Buntsandstein’’ of SW Germany (Odenwald), CL-spectrum in Fig. 6c; g crossed nicols...(Middle-Upper Devonian ‘‘Massenkalk’’, W€ ulfrath=W Germany) and related Red=Green=Blue (RGB)-values in a digital |  | | Book | | Mohr-Westheide Occurrence and Distribution of Moganite and Opal-CT in Agates from Paleocene/Eocene Tuffs, El Picado...of Cuba). The agates consist of high amounts of opal and moganite. Surficial alteration of basic volcanic... T. Occurrence and Distribution of Moganite and Opal-CT in Agates from Paleocene/Eocene Tuffs, El Picado...Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany Helmholtz-Zentrum Dresden-Rossendorf...Hemholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr |  | Pan, Yuanming, Li, Dien, Feng, Renfei, Wiens, Eli, Chen, Ning, Chernikov, Roman, Götze, Jens, Lin, Jinru (2021) Uranyl binding mechanism in microcrystalline silicas: A potential missing link for uranium mineralization by direct uranyl co-precipitation and environmental implications. Geochimica et Cosmochimica Acta, 292. 518-531 doi:10.1016/j.gca.2020.10.017 | Journal (article/letter/editorial) | | Bergakademie Freiberg, Institute of Mineralogy, Brennhausgasse 14, 09599 Freiberg, Germany e Key Laboratory...contribution, microcrystalline silicas (agate and opal-CT) containing 27–137 ppm U have been investigated...2017; Othmane et al., 2013; Massey et al., 2014). Opal as hydrous silica (SiO2nH2O) varies widely in crystallinity...crystallinity and can be classified into opal-A, opal-CT and opal-C, where A, C and T denote amorphous,...Graetsch, 1994; Guthrie et al., 1995). For example, opal-CT has long been considered to represent a microcrystalline |  | | Journal (issue) | | by Andreas Massanek and Anna Dziwetzki from the Freiberg Bergakademie is dedicated to a special exhibition...Saxon minerals in the Terra Mineralia Museum (Germany). A group of Italian mineralogists presents a new..."Unique Discoveries from Saxony" Special Exposition at the Terra Mineralia in Freiberg 8 Jaroslav Hyrsl Erzgebirge...Fluorite (with old labels). 7 x 5 cm. Schwarzwald, Germany. GM KFU #7461. 15-16. (on page 10). 15. Set of...listed as Siberian), two from Brazil, and three from Saxony. The register also lists nine sapphires, twelve |  | | Book | | Institut für Mineralogie, TU Bergakademie Freiberg Germany Editorial Office MDPI St. Alban-Anlage 66...at the Technical University Bergakademie Freiberg (Germany). He graduated in Mineralogy and Geochemistry...Doctorate in Mineralogy from the Bergakademie Freiberg in 1989. Since 2005, he is Professor at the Institute...Institute of Mineralogy of the Technical University in Freiberg. His activities in research and education cover...specifics of SiO2 modifications and varieties (e.g., opal, chalcedony, agate, quartz, amethyst). Following |  | | Book | | Institut für Mineralogie, TU Bergakademie Freiberg Germany Editorial Office MDPI St. Alban-Anlage 66...at the Technical University Bergakademie Freiberg (Germany). He graduated in Mineralogy and Geochemistry...Doctorate in Mineralogy from the Bergakademie Freiberg in 1989. Since 2005, he is Professor at the Institute...Institute of Mineralogy of the Technical University in Freiberg. His activities in research and education cover...specifics of SiO2 modifications and varieties (e.g., opal, chalcedony, agate, quartz, amethyst). Following |
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