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Chevkinite-(Ce) from Russia

VL9-QH1Chevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2

Multiple photos available
06638970017362039904047.jpg
Vishnevye Mountains, Chelyabinsk Oblast, Russia

Dimensions: 7 cm x 7 cm x 2.5 cm

Section of the large grain of Chevkinite-(Ce) from syenit-pegmatite. Lustrous black with cherry-red inner refections fresh Chevkinite form the core surrounded by alteration rim, composed by mixture of yellow Th-rich Bastnasite-(Ce) and black tabular Ilmenite. This is very interesting and unusual type of chevkinite alteration, observed by me only on the second deposit. Specimen size is 7x7x2.5 cm and its radioactivity is 315 μR/h. Collected by P. Kalinin in 1959 on pegmatite vein #35. Pavel M. Kartashov collection and photo.

Material from the specimen was investigated and described in the article Macdonald R., Baginski B., Kartashov P. e.a. Hydrothermal alteration of a chevkinite-group mineral to a bastnasite_(Ce)-ilmenite-columbite-(Fe) assemblage: interaction with a F-, CO2-rich fluid.// Miner. and Petr.,2015, v.109, p. 659-678.
Copyright: © Pavel M. Kartashov collection & photo      Photo ID: 210250     Uploaded by: Pavel Kartashov   Approval date: 2009-02-01   View Count: 1215   Approval status: Public galleries    Type: Photo - 1013 x 853 pixels (0.9 Mpix)

7RH-318Chevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2

Multiple photos available
08583010017272037061718.jpg
Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Dimensions: 3.2 cm x 1.8 cm x 1.4 cm

Monomineral pebble of black low-niobian and low-zirconian Chevkinite-(Ce) from dumps after gold washing.
Pavel M. Kartashov analytical confirmation, collection and scan.
Copyright: © Pavel M. Kartashov collection & photo      Photo ID: 965656     Uploaded by: Pavel Kartashov   Approval date: 2019-07-07   View Count: 249   Approval status: Public galleries    Type: Photo - 1644 x 1269 pixels (2.1 Mpix)

KYC-DT8Chevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 , Bastnäsite-(Ce) Ce(CO3)F , Ilmenite Fe2+TiO3

Multiple photos available
06780610017272006108351.jpg
Vishnevye Mountains, Chelyabinsk Oblast, Russia

Dimensions: 6 cm x 5 cm x 3.5 cm

Section of the large 6x5x3.5 cm crystal of Chevkinite-(Ce) from syenite-pegmatite. Lustrous black with cherry-red inner refections fresh Chevkinite form the core, surrounded by alteration rim, composed by mixture of yellow Th-rich Bastnasite-(Ce) and black tabular Ilmenite. Collected by P. Kalinin in 1959 on pegmatite vein #35. Pavel M. Kartashov collection and scan.
Copyright: © Pavel M. Kartashov collection & photo      Photo ID: 210251     Uploaded by: Pavel Kartashov   Approval date: 2009-02-01   View Count: 744   Approval status: Public galleries    Type: Photo - 831 x 662 pixels (0.6 Mpix)

CJX-CLKChevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2

Multiple photos available
04373570017272037057899.jpg
Ilmen Nature Reserve, Chelyabinsk Oblast, Russia

Highly metamict 1.1 cm grain/crystal of chevkinite-(Ce) in pegmatitic matrix.
Copyright: © Lukasz Kruszewski 2007      Photo ID: 90962     Uploaded by: Łukasz Kruszewski   Approval date: 2007-02-09   View Count: 694   Approval status: Public galleries    Type: Photo - 1232 x 964 pixels (1.2 Mpix)

RFK-P7XChevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 , Ferro-ferri-katophorite Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2 , Zircon Zr(SiO4) , Pyrrhotite Fe1-xS

Multiple photos available
06733890017362043763219.jpg
Olenii Ruchei, Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia

Cut, not polished surface of rock. Brownish-black crystals of Chevkinite-(Ce) (well visible on cut surface and hard recognizable on broken one) are disseminated in greenish mass of Ferricatophorite grains. Associating minerals are abundant crystals of Zircon, yellowish K feldspar, bronze Pyrrhotite and golden Chalcopyrite. FOV is ~2x2 cm. Specimen was collected from DH#597 at the depth 778.8 m, the drill hole is located about 1 km E from Olenii Ruchei. Pavel M. Kartashov collection and photo.

Exactly this part of the specimen was investigated and described in coming article Macdonald R., Baginski B., Kartashov P. e.a. Chevkinite-group minerals from Russia and Mongolia - EJM.
Copyright: © Pavel M. Kartashov collection & photo      Photo ID: 413109     Uploaded by: Pavel Kartashov   Approval date: 2011-09-23   View Count: 581   Approval status: Public galleries    Type: Photo - 968 x 928 pixels (0.9 Mpix)

VY0-E3FChevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2

00186110017366805755169.jpg
Ilmen Mountains, Chelyabinsk Oblast, Russia

Field of View: 20 mm

Vitreous black, fractured inclusions of chevkinite-(Ce) in matrix.
The exact locality in the Ilmen Mountains was not specified by the dealer.
Purchased in 2012.
Copyright: © Andrew Hodgson      Photo ID: 1164535     Uploaded by: Andrew Hodgson   Approval date: 2021-09-06   View Count: 72   Approval status: Public galleries    Type: Photo - 1682 x 1484 pixels (2.5 Mpix)
 
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