Mineral Specimen Images (N)

Niningerite: (Mg,Fe++,Mn)S

Comments: PPL reflected light polished section showing light gray-brownish grains of troilite (Tr) with white niningerite (Nin) and dark silicates.
Location: Indarch meteorite, Shusha, Elizavetpol, Azerbaidshan. Scale: Picture Size 0.28 mm.
© Thomas Witzke

Niningerite: (Mg,Fe++,Mn)S

Comments: PPL reflected light polished section showing light gray-brownish grains of troilite (Tr) with white niningerite (Nin) and dark silicates.
Location: Indarch meteorite, Shusha, Elizavetpol, Azerbaidshan. Scale: Picture Size 0.28 mm.
© Thomas Witzke

Nioboaeschynite-(Ce): (Ce,Ca)(Nb,Ti)2(O,OH)6

Comments: Opaque, resinous crystal fragment of nioboaeschynite-(Ce).
Location: Bayan Obo deposit, Darhan Muminggan United Banner, Baotou League, Inner Mongolia Autonomous Region, China. Scale: Picture Size 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Nioboaeschynite-(Ce): (Ce,Ca)(Nb,Ti)2(O,OH)6

Comments: Opaque, resinous crystal fragment of nioboaeschynite-(Ce).
Location: Bayan Obo deposit, Darhan Muminggan United Banner, Baotou League, Inner Mongolia Autonomous Region, China. Scale: Picture Size 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Nioboaeschynite-(Y): [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6

Comments: BSE image of a nioboaeschynite-(Y) grain. (CanMin, v46:395).
Location: Bear Lake Diggings, Bancroft area, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Nioboaeschynite-(Y): [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6

Comments: BSE image of a nioboaeschynite-(Y) grain. (CanMin, v46:395).
Location: Bear Lake Diggings, Bancroft area, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Niobocarbide: (Nb,Ta)C

Comments: Small metallic grain of niobocarbide.
Location: Nizhne-Tagil'skoye (Mednorudyanskoye) Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.3 mm.
© Thomas Witzke / Abraxas-Verlag

Niobocarbide: (Nb,Ta)C

Comments: Small metallic grain of niobocarbide.
Location: Nizhne-Tagil'skoye (Mednorudyanskoye) Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.3 mm.
© Thomas Witzke / Abraxas-Verlag

Niobokupletskite: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)  
Kupletskite: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F

Comments: Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Niobokupletskite: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)  
Kupletskite: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F

Comments: Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Niobophyllite: K2Na(Fe++,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O)

Comments: Blackish-brown resinous to silky fibrous niobophyllite coatings on quartz.
Location: Seal Lake area, Labrador, Newfoundland, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Niobophyllite: K2Na(Fe++,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O)

Comments: Blackish-brown resinous to silky fibrous niobophyllite coatings on quartz.
Location: Seal Lake area, Labrador, Newfoundland, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Niocalite: Ca14Nb2(Si2O7)4O6F2

Comments: Yellowish brown crystal prisms of niocalite in a carbonatite rock matrix.
Location: Oka, Oka complex, Deux-Montagnes Co., Québec, Canada. Scale: Crystal length 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Niocalite: Ca14Nb2(Si2O7)4O6F2

Comments: Yellowish brown crystal prisms of niocalite in a carbonatite rock matrix.
Location: Oka, Oka complex, Deux-Montagnes Co., Québec, Canada. Scale: Crystal length 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Nissonite: Cu2Mg2(PO4)2(OH)2·5(H2O)

Comments: Pale blue nissonite crusts on rock.
Location: Panoche Valley, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nissonite: Cu2Mg2(PO4)2(OH)2·5(H2O)

Comments: Pale blue nissonite crusts on rock.
Location: Panoche Valley, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Niter: KNO3

Comments: Tan to white crystalline granular niter.
Location: Buffalo River Valley, Searcy County, Arkansas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Niter: KNO3

Comments: Tan to white crystalline granular niter.
Location: Buffalo River Valley, Searcy County, Arkansas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nitratine: NaNO3  
Iquiqueite: K3Na4Mg(Cr++++++O4)B24O39(OH)·12(H2O)

Comments: Yellow iquiqueiite in clear, massive nitration.
Location: Salar de Miraje, Antofagasta, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Nitratine: NaNO3

Comments: Euhedral crystalline aggregate of nitratine.
Location: Taltal, Antofagasta, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag