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Natrophosphate: Na7(PO4)2F·19(H2O)
Comments: Specimen of natrophosphate sealed into a plastic box. Location: Koashva Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 2x1.5x1 cm. © Sergey Vasiliev / Systematic Mineralogy
Nechelyustovite: (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}·4.5H2O
Comments: Nechelyustovite aggregate. Location: Kirovsky Mine, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Russia. Scale: Grid Size 1 mm. © Sergey Vasiliev / Systematic Mineralogy
Neskevaaraite-Fe: NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O)
Comments: Aggregate of brown neskevaaraite-Fe crystals. Location: Neskevaara Hill, Vuoriyarvi Massif, N.Karelia, Russia. Scale: Specimen Length 5 mm. © Sergey Vasiliev / Systematic Mineralogy
Obertiite: NaNa2(Mg3Fe+++Ti)Si8O22(O,F,OH)2
Comments: Pinkish grains of obertiite in matrix. Location: Bellerberg Mt., Eifel District, Rheinland-Phalz, Germany. Scale: Specimen Size 7x6 mm. © Sergey Vasiliev / Systematic Mineralogy
Olgite: Na(Sr,Ba)PO4
Comments: Green mm-sized olgite crystals in matrix. Location: Kedykverpakhk Mt., Lovozero, Kola, Russia. Scale: Not Given. © Sergey Vasiliev / Systematic Mineralogy
Pellouxite: (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O
Comments: Dark metallic pellouxite grains in matrix. Location: Buca della Vena mine, Ponte Stazzemese, Alpi Apuane, Stazzema, Lucca, Toscana, Italy. Scale: Specimen Size 12x12x7 mm. © Sergey Vasiliev / Systematic Mineralogy
Penobsquisite: Ca2Fe++[B9O13(OH)6]Cl·4(H2O)
Comments: Clear crystal of penobsquisite. Location: Inder B deposit and salt dome, Atyrau Oblysy, Kazakhstan. Scale: Crystal Size 7x6x4 mm. © Sergey Vasiliev / Systematic Mineralogy
Peprossiite-(Ce): (Ce,La)(Al3O)2/3B4O10
Comments: Yellow grains of peprossiite-(Ce) on matrix. Location: Sacrofano Caldera, Campagnano, Lazio, Italy. Scale: Specimen Size 11x4x4 mm. © Sergey Vasiliev / Systematic Mineralogy
Philolithite: Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12
Comments: Dark green mass of philolithite. Location: Langban, Värmland, Sweden. Scale: Specimen Size 7x5x3 mm. © Sergey Vasiliev / Systematic Mineralogy
Phosphoinnelite: Ba4Na3Ti3Si4O14(PO4,SO4)2(O,F)3
Comments: Yellowish inclusions of phosphoinnelite in matrix. Location: Kovdor Phlogopite Quarry, Kovdor Massif, Kola Peninsula, Russia. Scale: Specimen Size 15x10x8 mm. © Sergey Vasiliev / Systematic Mineralogy