Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia

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Aenigmatite : Na₂Fe²⁺₅TiO₂(Si₆O₁₈), Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂\|Si₈O₂₂], Orthoclase : K[AlSi₃O₈], Quartz : SiO₂
	Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Large black laths of aenigmatite (some of them are up to 10 cm long) into nordmarkit-pegmatite from the northern slope of Ulyn Khuren Mt. Exactly this specimen wasn't investigated, but some crystals of this primary aenigmatite were decay into mixture of wilkinsonite, magnetite, ilmenite, two unidentified (new?) alkaline Fe-silicates and ...
© Pavel M. Kartashov	Photo ID: 142972 View Count: 194
Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄\|Si₂O₇]₂
	Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Pink triangular tabular crystals of aluminocerite (IMA2007-060) into cavities of black niobian chevkinite large crystal. FOV ~4x3 mm. Selfcollected in the trench #2 of Western ore zone of the deposit in July 1990. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 110012 View Count: 207
Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Fergusonite-(Y) : YNbO₄, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄\|Si₂O₇]₂, Quartz : SiO₂
	Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Pinkish-red crystals of Aluminocerite-(Ce) (IMA2007-060) into cavity on the border of quartz and intergrowth of black chevkinite-(Ce) and brown metamict glue-like fergusonite-(Y). FOV is ~4x3.5 mm. Selfcollected in the trench #2 of Western ore zone of the deposit in July 1990. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 110021 View Count: 130
Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄\|Si₂O₇]₂, Titanite : CaTi[O\|SiO₄], Zircon : Zr[SiO₄], Epidote : {Ca₂}{Al₂Fe³⁺}[O\|OH\|SiO₄\|Si₂O₇]
	Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Pinkish-red grains of Aluminocerite-(Ce) (IMA2007-060) in fibrous whitish fersmite-synchysite-titanite crust of alteration of black niobian chevkinite-(Ce). Brownish crystals of zircon and green ones of epidote are visible. Selfcollected in the trench #2 of Western ore zone of the deposit in July 1990. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 110016 View Count: 114
Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃
	Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Pinkish-red crystals of aluminocerite (IMA2007-060) into cavity on the border of large crystal of chevkinite-(Ce) and epidote. White crusts are the secondary calcite. FOV ~5x4 mm. Selfcollected in the trench #2 of Western ore zone of the deposit in July 1990. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 110020 View Count: 114
Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂\|Si₈O₂₂]
	Pseudomorphosed pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Large (9x5x3 cm) unbroken terminated arfvedsonite monocrystal from quartz core of the pegmatite. Twinned crystals are much more abundant here. This arfvedsonite is potassium rich, magnesium free and is close to end member. Collected in August 2000. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 71469 View Count: 297
Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂\|Si₈O₂₂]
	Pseudomorphosed pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Large (9x5x3 cm) unbroken terminated arfvedsonite monocrystal from quartz core of the pegmatite. Twinned crystals are much more abundant here. This arfvedsonite is potassium rich, magnesium free and close to end member. Collected in August 2000. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 70380 View Count: 260
Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂\|Si₈O₂₂], Aegirine : NaFe³⁺[Si₂O₆]
	Pseudomorphosed pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Large (9x5x3 cm) unbroken terminated arfvedsonite monocrystal from quartz core of the pegmatite. Twinned crystals are much more abundant here. It is well visible, that arfvedsonite is decorated with more later brown to brownish-green aegirine needles. Collected in August 2000. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 71470 View Count: 221
Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S\|(SiO₄)₃], Hingganite-(Y) : (Y,REE,Ca)₂(□,Fe²⁺)Be₂[SiO₄]₂(OH)₂, Thorite : (Th,U)[SiO₄], Microcline : K[AlSi₃O₈], Quartz : SiO₂
	Tat'yana pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag Massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Orange acicular bavenite agregate grow over large tetrahedron of yellowish genthelvite from quartz core of the pegmatite. Associated mineral are red Fe-rich microcline crystals, brown hingganite-(Y) and -(Ce) complex crystals, yellow rounded grains of thorite. Specimen size is 5.5x4x3 cm. Selfcollected in August of 1990. Pavel M. Kartashov ...
© Pavel M. Kartashov	Photo ID: 142991 View Count: 136
Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S\|(SiO₄)₃], Microcline : K[AlSi₃O₈], Thorite : (Th,U)[SiO₄]
	Tat'yana pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag Massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia Close-up of orange acicular bavenite agregate grow over large tetrahedron of yellowish genthelvite from quartz core of the pegmatite. Associated mineral are red Fe-rich microcline crystals, yellow rounded grains of thorite. FOV is 3x2.5 cm. Selfcollected in August of 1990. Pavel M. Kartashov collection and photo.
© Pavel M. Kartashov	Photo ID: 142992 View Count: 118

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Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia

Aenigmatite : Na₂Fe²⁺₅TiO₂(Si₆O₁₈), Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂], Orthoclase : K[AlSi₃O₈], Quartz : SiO₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Fergusonite-(Y) : YNbO₄, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂, Quartz : SiO₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂, Titanite : CaTi[O|SiO₄], Zircon : Zr[SiO₄], Epidote : {Ca₂}{Al₂Fe³⁺}[O|OH|SiO₄|Si₂O₇]

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂]

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂]

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂], Aegirine : NaFe³⁺[Si₂O₆]

Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S|(SiO₄)₃], Hingganite-(Y) : (Y,REE,Ca)₂(□,Fe²⁺)Be₂[SiO₄]₂(OH)₂, Thorite : (Th,U)[SiO₄], Microcline : K[AlSi₃O₈], Quartz : SiO₂

Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S|(SiO₄)₃], Microcline : K[AlSi₃O₈], Thorite : (Th,U)[SiO₄]

Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia

Aenigmatite : Na2Fe2+5TiO2(Si6O18), Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22], Orthoclase : K[AlSi3O8], Quartz : SiO2

Aluminocerite-(Ce) : (Ce,La,Ca)9(Al,Fe3+)(SiO4)3[SiO3(OH)]4(OH)3, Chevkinite-(Ce) : (Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2[O4|Si2O7]2

Aluminocerite-(Ce) : (Ce,La,Ca)9(Al,Fe3+)(SiO4)3[SiO3(OH)]4(OH)3, Fergusonite-(Y) : YNbO4, Chevkinite-(Ce) : (Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2[O4|Si2O7]2, Quartz : SiO2

Aluminocerite-(Ce) : (Ce,La,Ca)9(Al,Fe3+)(SiO4)3[SiO3(OH)]4(OH)3, Chevkinite-(Ce) : (Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2[O4|Si2O7]2, Titanite : CaTi[O|SiO4], Zircon : Zr[SiO4], Epidote : {Ca2}{Al2Fe3+}[O|OH|SiO4|Si2O7]

Aluminocerite-(Ce) : (Ce,La,Ca)9(Al,Fe3+)(SiO4)3[SiO3(OH)]4(OH)3

Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22]

Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22]

Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22], Aegirine : NaFe3+[Si2O6]

Bavenite : Ca4Be2Al2Si9O26(OH)2, Genthelvite : Zn4Be3[S|(SiO4)3], Hingganite-(Y) : (Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2, Thorite : (Th,U)[SiO4], Microcline : K[AlSi3O8], Quartz : SiO2

Bavenite : Ca4Be2Al2Si9O26(OH)2, Genthelvite : Zn4Be3[S|(SiO4)3], Microcline : K[AlSi3O8], Thorite : (Th,U)[SiO4]

Aenigmatite : Na₂Fe²⁺₅TiO₂(Si₆O₁₈), Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂], Orthoclase : K[AlSi₃O₈], Quartz : SiO₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Fergusonite-(Y) : YNbO₄, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂, Quartz : SiO₂

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃, Chevkinite-(Ce) : (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂[O₄|Si₂O₇]₂, Titanite : CaTi[O|SiO₄], Zircon : Zr[SiO₄], Epidote : {Ca₂}{Al₂Fe³⁺}[O|OH|SiO₄|Si₂O₇]

Aluminocerite-(Ce) : (Ce,La,Ca)₉(Al,Fe³⁺)(SiO₄)₃[SiO₃(OH)]₄(OH)₃

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂]

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂]

Arfvedsonite : [Na][Na₂][Fe²⁺₄Fe³⁺][(OH)₂|Si₈O₂₂], Aegirine : NaFe³⁺[Si₂O₆]

Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S|(SiO₄)₃], Hingganite-(Y) : (Y,REE,Ca)₂(□,Fe²⁺)Be₂[SiO₄]₂(OH)₂, Thorite : (Th,U)[SiO₄], Microcline : K[AlSi₃O₈], Quartz : SiO₂

Bavenite : Ca₄Be₂Al₂Si₉O₂₆(OH)₂, Genthelvite : Zn₄Be₃[S|(SiO₄)₃], Microcline : K[AlSi₃O₈], Thorite : (Th,U)[SiO₄]