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Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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Hybla, Monteagle Township, Bancroft District, Hastings Co., Ontario, Canada Shiny black "ellsworthite" crystals to 15 mm frozen in feldspar matrix. Originally acquired in 1937 from F. Hess. Has accompanying label with results from spectrographic analysis confirming ellsworthite species (Actually this is uranpyrochlore). Ex. Dr. E. Sensel collection #B12. Overall size of mineral specimen: 9x8x5 cm. Size of individual ... |
| © 2001 John H. Betts | Photo ID: 809 View Count: 1040 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F), Zircon (Var: Cyrtolite) : Zr[(SiO4),(OH)4] | |
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MacDonald mine, Hybla, Monteagle Township, Bancroft District, Hastings Co., Ontario, Canada Just a neat locality piece with small black crystals of uranpyrochlore and brown crystals of zircon mixed in. 6.8 x 4 x 2.7 cm |
| © Rob Lavinsky | Photo ID: 69241 View Count: 357 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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MacDonald mine, Hybla, Monteagle Township, Bancroft District, Hastings Co., Ontario, Canada Width of field is 2.5 mm. Collection of Jesse Crawford. The depth of field has been enhanced using Helicon Focus (11 exposures). Equipment: Nikon D-100 digital camera on a homemade microscope. Anhedral grains of uranpyrochlore in matrix. |
| © 2008 Jesse Crawford | Photo ID: 175657 View Count: 123 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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MacDonald mine, Hybla, Monteagle Township, Bancroft District, Hastings Co., Ontario, Canada Width of field is 7.0 mm. Collection of Jesse Crawford. The depth of field has been enhanced using CombineZP (12 frames). Equipment: Nikon D-100 digital camera on a homemade microscope. |
| © 2008 Jesse Crawford | Photo ID: 181849 View Count: 111 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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MacDonald mine, Hybla, Monteagle Township, Bancroft District, Hastings Co., Ontario, Canada Uranpyrochlore crystals Field of view 6 mm Photo and Collection Patrice Queneau |
| © P.Queneau | Photo ID: 192142 View Count: 87 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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St Lawrence Columbium Mine, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada Two small crystals of uranpyrochlore in carbonatite matrix. The dimension of the largest crystal was 4mm. This specimen is significantly radioactive for it's size, X-ray identification shows these pyrochlores to be metamict. |
| Photo ID: 207923 View Count: 136 | |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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"Auf Dickel" (incl. Nonnental), Rockeskyll, Gerolstein, Eifel Mts, Rhineland-Palatinate, Germany Reddish brown octahedral crystals of Uranpyrochlore on Sanidine and in paragenesis with Zircon, Magnetite and Fluorapatite. Identification by SEM-EDS suggests a composition with a Ti/Nb ratio of 1/3 and a U+Th/Na+Ca ratio of 1/3. Specimen was collected in 04/1981, field of view 5 mm, collection C.&H. Schäfer |
| © C.H.M.-Schäfer | Photo ID: 191661 View Count: 110 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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Antanetinilapa (Estatoby), Sahatany Valley, Sahatany Pegmatite Field (Mt Bity (Ibity) area), Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar A 1,5 mm dark crystal of uranpyrochlore. The specimen was provided by Knut Edvard Larsen, and it is now in the micromount collection of OT. Ljostad (no 4745). |
| © OT. Ljostad | Photo ID: 75423 View Count: 245 |
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Tazheranskii Massif, Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia Fragment of more large grain of dark-brown, almost black, uranpyrochlore from amazonite pegmatites of Tazheran massif. This "mendeleevite" (local name for betafites) had preserved in my collection long time, but analyses, made on the last week, show, that its composition is ... |
| © Pavel M. Kartashov | Photo ID: 145735 View Count: 188 |
Uranpyrochlore : (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) | |
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Brown Derby No. 1, Brown Derby Mine, Ohio City, Quartz Creek District, Gunnison Co., Colorado, USA Brownish mass with some white albite; 2.7x2.5x1.2cm; Quite rare from this locality. Collected by Rudy Bolona. |
| Photo ID: 256581 View Count: 53 | |
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