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Fergusonite-(Nd): (Nd,Ce)(Nb,Ti)O4 Ferriallanite-(Ce): CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH)
Comments: Orange-brown ferusonite-(Nd) grains in ferriallanite-(Ce) zone of the vein. Main black inclusions are ferriallanite-(Ce) crystals. White matrix is mixture of calcian strontianite and strontian calcite. Location: Tornebohmite vein, Biraya Fe-REE ore occurrence, Biraya and Bya Rivers confluence area (Chara Basin), Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: FOV 1 cm. © Pavel M. Kartashov
Ferriallanite-(Ce): CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH) Kainosite-(Y): Ca2(Y,Ce)2Si4O12(CO3)·(H2O)
Comments: Short prismatic black crystals of ferriallanite-(Ce) in white slightly weathered kainosite-(Y). Orange prisms are zircons of the first generation. Fragment of the holotype specimen. Location: Neprimetnyi pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag Massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia. Scale: Crystal Size 2 mm. © Pavel M. Kartashov
Ferric-ferronyboite: NaNa2(Fe++)3(Fe+++)2(Si7Al)O22(OH)2
Comments: Black granular-prismatic masses of ferric-ferronyboite. Associated minerals are white albite and beige zircon. Location: Abdong (Aptong) Zr-Nb deposit, Pyonggang-gun, Kangwon Province, North Korea. Scale: Picture Size 12x10 mm. © Pavel M. Kartashov
Ferronordite-(La): Na3Sr(La,Ce)FeSi6O17 Ferronordite-(Ce): Na3SrCeFe++Si6O17
Comments: Large complex rosette of ferronordite-(La) in center and ferronordite-(Ce) on terminations of platy crystals. Earthy yellowish rhabdophane is Ce dominant. Location: Bolshoi Punkaruaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV is 12x10 mm. © Pavel M. Kartashov
Fluorcalciobritholite: (Ca,REE)5[(Si,P)O4]3F
Comments: Reddish black fluorcalciobritholite grain from the type locality. Part of the holotype specimen. Location: Tuliok River head, East slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Grain Size 0.8 mm. © Pavel M. Kartashov
Fluoro-ferroleakeite: NaNa2(Fe++2Fe+++2Li)Si8O22F2
Comments: Euhedral crystal of dark green fluoro-ferroleakeite with a lighter green aegirine rim in an agpaitic rare metal granite. Associated mineral is orange magmatic calcian elpidite with white albite. Location: Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia. Scale: FOV is 12x10 mm. © Pavel M. Kartashov
Fluorophlogopite: KMg3(AlSi3)O10F2
Comments: Books of fluorphlogopite from a magnesian skarn showing the basal cleaveage of the micas.. Location: Arebilovskoe phlogopite deposit, Aldan, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. Scale: Specimen size is 3.5x2.5x0.8 cm. © Pavel M. Kartashov
Glagolevite: NaMg6[Si3AlO10](OH,O)8·H2O Andradite: Ca3Fe+++2(SiO4)3
Comments: Pearly white plates of glagolevite with olive-colored andradite dodecohedrons. Location: Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x10 mm. © Pavel M. Kartashov
Golyshevite: (Na,Ca)10Ca9(Fe+++,Fe++)2Zr3NbSi25O72(CO3)(OH)3·H2O
Comments: Light yellowish-brown zircon-like colored golyshevite crystal. Location: Kovdor Phlogopite mine (Mica Mine; Slyuda Mine; Kovdorslyuda Shaft), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV is 9x7 mm. © Pavel M. Kartashov
Hellandite-(Y): (Ca,REE)4(Y,Ce)2(Al,[ ])2[Si4B4O22](OH)2
Comments: Short-prismatic crystal of dark-brown hellandite-(Y) in granitic pegmatite. Location: Tusion River Valley, Pamir Mts, Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni), Tajikistan. Scale: FOV is 2x1.7 cm. © Pavel M. Kartashov