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Fergusonite-(Y) : YNbO4 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Prismatic crystals of Fergusonite in a matrix of Feldspar, field of view 80 mm. |
| © Riksmuseet Stockholm | Photo ID: 180218 View Count: 109 |
Fergusonite-(Y) : YNbO4 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Brown resinous cross-section of a fergusonite-(Y) crystal (7 mm) in microcline with biotite (annite). |
| © Van King | Photo ID: 235644 View Count: 27 |
Formanite-(Y) : YTaO4 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Tabular crystals of metamict glue-like formanite-(Y). Empyrical formula of the mineral is (Y.48REE.15Ca.08U.04Th.01)0.76(Ta.86Nb.10Ti.04)(O3.21(OH).79)4. Mineral contain microinclusions of tanteuxenite-(Y) grains. So may be yellow metamict "yttrotantalites" from Ytterby are formanite/tanteuxenite mixtures. Associating minerals are quartz and ... |
| © Pavel M. Kartashov | Photo ID: 114567 View Count: 404 |
Gadolinite-(Y) : Y2Fe2+Be2[O|SiO4]2 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Complete gadolinite crystal, 2.5x4 cm, with feldspar and biotite. |
| © B. Otter | Photo ID: 22660 View Count: 510 |
Gadolinite-(Y) : Y2Fe2+Be2[O|SiO4]2 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden 5 mm grain of fresh not oxidized and crystalline (not metamict) analysed gadolinite-(Y) in granite pegmatite matrix. Bottle green inner reflection are well visible. Outer part of the grain is more oxidized and is brownish (see the left part of the grain). It is the most light coloured gadolinite-(Y) which I somewhen saw. Associating minerals are ... |
| © Pavel M. Kartashov | Photo ID: 73248 View Count: 262 |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden A very typical Gadolinite- (Y) sample from the famous Ytterby quarry, embedded in feldspar, between but also in direct contact with the biotite. Specimen size 145x 35 and the crystal 10x 20 (mm). Next pic shows a close-up. From the collection of Tech. Lic. Berit Alm (1945 - 2006). Now at the Division of Mining and Geotechnical Engineering, ... |
| © AÖ 2007 | Photo ID: 120340 View Count: 170 |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Group of two crystals with curved faces in a matrix of Biotite and a perthitic Microcline, field of view 100 mm, collection C.& H. Schäfer |
| © C.H.M.-Schäfer | Photo ID: 105697 View Count: 151 |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Another really beautiful little specimen from the collection of Tech. Lic. Berit Alm (1945 - 2006). The larger of the two Gadolinites is 12 mm. Next pic just another angle. Now at the Division of Mining and Geotechnical Engineering, Luleå University of Technology, Sweden. Photo A. Österlöf 2007. |
| © AÖ 2007 | Photo ID: 120342 View Count: 122 |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Crystalline section; 2.5 cm long; This specimen has interesting pedigree. It came out of the New York State Museum and was once in the collection of George Frederick Kunz. His orange "K" label came with it. Collection of Rudy Bolona. |
| Photo ID: 201541 View Count: 71 | |
Gadolinite-(Y) : Y2Fe2+Be2[O|SiO4]2 | |
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Ytterby, Resarö, Vaxholm, Uppland, Sweden Gadolinite crystals in matrix. Specimen is from the collection of the British Museum of Natural History #48812 (1975). Scale at bottom of image is an inch with a rule at one cm. |
| Photo ID: 246211 View Count: 32 | |
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