Steenstrupine-(Ce), Sazhinite-(Ce), Manganoneptunite, Serandite, Natrolite

Specimen ID: YDK-JL1

Mineral(s)
Steenstrupine-(Ce) : Na14Mn2+2(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2·2H2O
Sazhinite-(Ce) : Na2CeSi6O14•6H2O
Manganoneptunite : Na2KLiMn2+2Ti2Si8O24
Serandite : NaMn2+2Si3O8(OH)
Natrolite : Na2Al2Si3O10·2H2O
Locality
As recorded:
Yubileinaya pegmatite, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
Mindat locality:
Dimensions
8cm x 7.5cm x 3cm
Collections
Collected by:
Events

Photo added to mindat.org

2x1 cm dark-brown almost black grain of Steenstrupine surrounded by light-orange laths of Serandite surrounded by abundant grains of brownish-red Manganoneptunite surrounded by greenish-grey glass-like Sazhinite grains in cavernous pink Natrolite of axial zone of the pegmatite. Minor associated minerals are usual for locality Raite, Zorite, Magnesioarfvedsonite and specific for this set of specimens unidentified hydrous carbonates of REE (with Na and without it, (Ce)-, (La)- and (Nd)-dominant) their pearly flakes overgrow sazhinite grains. Specimen size is 8x7.5x3 cm and its radioactivity is 235 μR/h. Selfcollected in August of 1998. Pavel M. Kartashov collection and photo.
Pavel Kartashov - 20th December 2008

Photo added to mindat.org

The same under slightly another angle of illumination. 2x1 cm dark-brown almost black grain of Steenstrupine surrounded by light-orange laths of Serandite surrounded by abundant grains of brownish-red Manganoneptunite surrounded by greenish-grey glass-like Sazhinite grains in cavernous pink Natrolite of axial zone of the pegmatite. Minor associated minerals are usual for locality Raite, Zorite, Magnesioarfvedsonite and specific for this set of specimens unidentified hydrous carbonates of REE (with Na and without it, (Ce)-, (La)- and (Nd)-dominant) their pearly flakes overgrow sazhinite grains. Specimen size is 8x7.5x3 cm and its radioactivity is 235 μR/h. Selfcollected in August of 1998. Pavel M. Kartashov collection and photo.
Pavel Kartashov - 20th December 2008
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