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Polyakovite-(Ce)

A valid IMA mineral species

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Photos of Polyakovite-(Ce) (5)

Polyakovite-(Ce) Gallery Search Photos of Polyakovite-(Ce)

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Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce), etc.

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce), etc.

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce), etc.

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce), etc.

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

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About Polyakovite-(Ce)Hide

Vladislav O. Polyakov

Formula:

(Ce,Ca)₄(Mg,Fe²⁺)(Cr³⁺,Fe³⁺)₂(Ti,Nb)₂(Si₂O₇)₂O₈

Colour:

Black

Lustre:

Vitreous

Hardness:

5½ - 6

Specific Gravity:

4.75

Crystal System:

Monoclinic

Member of:

Chevkinite Subgroup > Chevkinite Group

Name:

Named in honor of Vladislav Olegovich Polyakov (Владислав Олегович Поляков) (5 August 1950, Kirsanov, Tambov region, USSR - 13 September 1993, Miass, Chelyabinsk, USSR), mineralogist with the Institute of Mineralogy of the Ural Branch of the Russian Academy of Sciences. He was an expert in the Urals and Ilmensky mountains.

Type Locality:

ⓘ Pit No. 97, Miass, Chelyabinsk Oblast, Russia

This page provides mineralogical data about Polyakovite-(Ce).

Unique IdentifiersHide

Mindat ID:

10397

Long-form identifier:

mindat:1:1:10397:8

GUID
(UUID V4):

06e65a98-df24-45cc-8b11-a722a2561385

IMA Classification of Polyakovite-(Ce)Hide

IMA status:

Approved

IMA Formula:

(Ce,Ca)₄MgCr₂(Ti,Nb)₂Si₄O₂₂

Approval year:

1998

Classification of Polyakovite-(Ce)Hide

Strunz-mindat (2023):

9.BE.70

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si₂O₇ groups, with additional anions; cations in octahedral [6] and greater coordination

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Pak-Ce	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Polyakovite-(Ce)Hide

Lustre:

Vitreous

Transparency:

Translucent

Colour:

Black

Streak:

Light brown.

Hardness:

5½ - 6 on Mohs scale

Hardness:

VHN₂₀₀=874 kg/mm² - Vickers

Tenacity:

Brittle

Cleavage:

None Observed
None

Parting:

none

Fracture:

Conchoidal

Density:

4.75(7) g/cm³ (Measured) 5.05 g/cm³ (Calculated)

Comment:

cannot obtain a cell volume on polyakovite-(Ce) as it does not give a diffraction pattern

Optical Data of Polyakovite-(Ce)Hide

Colour in reflected light:

Gray.

Internal Reflections:

brown internal reflections are rarely observed.

Pleochroism:

Non-pleochroic

Comments:

1.931 < n < 1.935

Chemistry of Polyakovite-(Ce)Hide

Mindat Formula:

(Ce,Ca)₄(Mg,Fe²⁺)(Cr³⁺,Fe³⁺)₂(Ti,Nb)₂(Si₂O₇)₂O₈

Elements listed:

Ca, Ce, Cr, Fe, Mg, Nb, O, Si, Ti - search for minerals with similar chemistry

Crystallography of Polyakovite-(Ce)Hide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

B2/m

Setting:

C2/m

Cell Parameters:

a = 13.398 Å, b = 5.6974 Å, c = 11.042 Å
β = 100.539°

Ratio:

a:b:c = 2.352 : 1 : 1.938

Unit Cell V:

828.6 Å³

Morphology:

Euhedral crystals, elongate [010] showing the forms {100}, {001}, {201}, 201}, {110}, {111}, {111}, {112}, {112}, and {302} (almost identical to chevkinite).

Comment:

annealed from metamict crystal

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005725	Polyakovite-(Ce)	Popov V A, Pautov L A, Sokolova E V, Hawthorne F C, McCammon C A, Bazhenova L F (2001) Polyakovite-(Ce), (REE,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22, a new metamict mineral species from the Ilmen Mountains, Southern Urals, Russia: Mineral discription and crystal chemistry The Canadian Mineralogist 39 1095-1104		2001	Ilmen Mountains, Southern Urals, Russia	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Polyakovite-(Ce)'
loop_
_publ_author_name
'Popov V A'
'Pautov L A'
'Sokolova E V'
'Hawthorne F C'
'McCammon C A'
'Bazhenova L F'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 39 
_journal_year 2001
_journal_page_first 1095
_journal_page_last 1104
_publ_section_title
;
 Polyakovite-(Ce), (REE,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22, a new metamict
 mineral species from the Ilmen Mountains, Southern Urals, Russia: Mineral
 discription and crystal chemistry
;
_database_code_amcsd 0005725
_chemical_compound_source 'Ilmen Mountains, Southern Urals, Russia'
_chemical_formula_sum '(Ce1.84 La1.24 Nd.36 Pr.16 Y.04 Ca.24 Th.12) Mg.8 Fe.92 Ti1.52 Nb.32 Cr1.28 Si4 O22'
_cell_length_a 13.398
_cell_length_b 5.6974
_cell_length_c 11.042
_cell_angle_alpha 90
_cell_angle_beta 100.539
_cell_angle_gamma 90
_cell_volume 828.659
_exptl_crystal_density_diffrn      5.009
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
CeA1   0.35606   0.00000   0.73540   0.46000   0.01520
LaA1   0.35606   0.00000   0.73540   0.31000   0.01520
NdA1   0.35606   0.00000   0.73540   0.09000   0.01520
PrA1   0.35606   0.00000   0.73540   0.04000   0.01520
YA1   0.35606   0.00000   0.73540   0.01000   0.01520
CaA1   0.35606   0.00000   0.73540   0.06000   0.01520
ThA1   0.35606   0.00000   0.73540   0.03000   0.01520
CeA2   0.07041   0.00000   0.74116   0.46000   0.01990
LaA2   0.07041   0.00000   0.74116   0.31000   0.01990
NdA2   0.07041   0.00000   0.74116   0.09000   0.01990
PrA2   0.07041   0.00000   0.74116   0.04000   0.01990
YA1   0.07041   0.00000   0.74116   0.01000   0.01990
CaA2   0.07041   0.00000   0.74116   0.06000   0.01990
ThA2   0.07041   0.00000   0.74116   0.03000   0.01990
Mg1   0.50000   0.00000   0.50000   0.80000   0.01690
Fe1   0.50000   0.00000   0.50000   0.20000   0.01690
Ti2   0.25000   0.25000   0.00000   0.76000   0.00930
Nb2   0.25000   0.25000   0.00000   0.16000   0.00930
Cr3   0.00000   0.00000   0.00000   0.64000   0.01200
Fe3   0.00000   0.00000   0.00000   0.36000   0.01200
Cr4   0.50000   0.00000   0.00000   0.64000   0.01330
Fe4   0.50000   0.00000   0.00000   0.36000   0.01330
Si(1)   0.20220  -0.50000   0.73270   1.00000   0.01050
Si(2)   0.35820  -0.50000   0.54520   1.00000   0.01230
O(1)   0.47850   0.25200   0.87260   1.00000   0.01080
O(2)   0.14720   0.00000   0.97820   1.00000   0.01090
O(3)   0.18880   0.00000   0.59820   1.00000   0.01460
O(4)   0.34950   0.00000   0.98870   1.00000   0.00900
O(5)   0.42830   0.26890   0.59150   1.00000   0.02540
O(6)   0.22790  -0.73600   0.81470   1.00000   0.01320
O(7)   0.08690  -0.50000   0.66900   1.00000   0.03020
O(8)   0.27500  -0.50000   0.63200   1.00000   0.03540
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
CeA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
LaA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
NdA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
PrA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
YA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
CaA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
ThA1 0.01220 0.01940 0.01390 0.00000 0.00200 0.00000
CeA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
LaA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
NdA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
PrA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
YA1 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
CaA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
ThA2 0.01220 0.03380 0.01360 0.00000 0.00180 0.00000
Mg1 0.02000 0.01430 0.01610 0.00000 0.00220 0.00000
Fe1 0.02000 0.01430 0.01610 0.00000 0.00220 0.00000
Ti2 0.01130 0.01010 0.00610 0.00020 0.00030 0.00020
Nb2 0.01130 0.01010 0.00610 0.00020 0.00030 0.00020
Cr3 0.01350 0.01560 0.00670 0.00000 0.00170 0.00000
Fe3 0.01350 0.01560 0.00670 0.00000 0.00170 0.00000
Cr4 0.01500 0.01690 0.00710 0.00000 -0.00030 0.00000
Fe4 0.01500 0.01690 0.00710 0.00000 -0.00030 0.00000
Si(1) 0.01800 0.00760 0.00540 0.00000 0.00090 0.00000
Si(2) 0.01280 0.01350 0.01030 0.00000 0.00170 0.00000
O(1) 0.01140 0.01070 0.00970 -0.00050 0.00040 0.00050
O(2) 0.01380 0.00900 0.01070 0.00000 0.00420 0.00000
O(3) 0.01930 0.01890 0.00460 0.00000 -0.00040 0.00000
O(4) 0.00760 0.00840 0.00940 0.00000 -0.00260 0.00000
O(5) 0.03400 0.02470 0.01590 0.01200 0.00030 0.00210
O(6) 0.02200 0.01090 0.00600 0.00280 0.00100 -0.00030
O(7) 0.02010 0.05760 0.01170 0.00000 -0.00050 0.00000
O(8) 0.03450 0.06190 0.01510 0.00000 0.01850 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
5.44 Å	(40)
3.18 Å	(50)
3.15 Å	(40)
2.849 Å	(40)
2.715 Å	(100)
2.160 Å	(45)

Comments:

N97 mine, Russia. Data from the type description for annealed material (normally amorphous to X-rays).

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites
35 : Ultra-alkali and agpaitic igneous rocks
Stage 7: Great Oxidation Event	<2.4
47e : [Vanadates, chromates, manganates]
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of Polyakovite-(Ce)Hide

Type Locality:

ⓘ Pit No. 97, Miass, Chelyabinsk Oblast, Russia

General Appearance of Type Material:

Equant anhedral grains, to 2.5 cm across, and as euhedral crystals, elongate [010] to 2 mm.

Place of Conservation of Type Material:

Museum of the Ilmen Natural Reserve at Miass
Fersman Mineralogical Museum, Moscow

Geological Setting of Type Material:

It is of hydrothermal origin in a carbonatite vein

Associated Minerals at Type Locality:

Synonyms of Polyakovite-(Ce)Hide

IMA1998-029

Other Language Names for Polyakovite-(Ce)Hide

Russian:Поляковит-(Ce)

Simplified Chinese:铈鲍利雅科夫矿

Relationship of Polyakovite-(Ce) to other SpeciesHide

Member of:

Chevkinite Subgroup > Chevkinite Group

Other Members of this group:

Chevkinite-(Ce)	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂	Mon. 2/m : P2₁/b
Chevkinite-(Nd)	(Nd,REE)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈ ?
Christofschäferite-(Ce)	Ce₃CaMnTiFe(³⁺)Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/m
Delhuyarite-(Ce)	Ce₄Mg(Fe³⁺,W)₃◻(Si₂O₇)₂O₆(OH)₂	Mon. 2/m : B2/m
Dingdaohengite-(Ce)	(Ce,La)₄Fe²⁺(Ti,Fe²⁺,Mg,Fe²⁺)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
Maoniupingite-(Ce)	(Ce,Ca)₄(Fe³⁺,Ti,Fe²⁺,◻)(Ti,Fe³⁺,Fe²⁺,Nb)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:

2 photos of Polyakovite-(Ce) associated with Fluoro-richterite	{Na}{CaNa}{Mg₅}(Si₈O₂₂)(F,OH)₂
1 photo of Polyakovite-(Ce) associated with Fergusonite-(Ce)	CeNbO₄ · 0.3H₂O
1 photo of Polyakovite-(Ce) associated with Fergusonite-(Y)	YNbO₄
1 photo of Polyakovite-(Ce) associated with Thorianite	ThO₂
1 photo of Polyakovite-(Ce) associated with Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂

Related Minerals - Strunz-mindat Grouping Hide

9.BE.	Paralomonosovite	Na₆◻₄Ti₄(Si₂O₇)₂[PO₃OH][PO₂(OH)₂]O₂(OF)	Tric. 1 : P1
9.BE.	Cámaraite	Ba₃Na(Fe²⁺,Mn)₈Ti₄(Si₂O₇)₄O₄(OH,F)₇	Tric. 1
9.BE.	Christofschäferite-(Ce)	Ce₃CaMnTiFe(³⁺)Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/m
9.BE.	Bobshannonite	Na₂KBa(Mn,Na)₈(Nb,Ti)₄(Si₂O₇)₄O₄(OH)₄(O,F)₂	Tric.
9.BE.	Calciomurmanite	(Na,◻)₂Ca(Ti,Mg,Nb)₄[Si₂O₇]₂O₂(OH,O)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Batievaite-(Y)	Y₂Ca₂Ti(Si₂O₇)₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Delhuyarite-(Ce)	Ce₄Mg(Fe³⁺,W)₃◻(Si₂O₇)₂O₆(OH)₂	Mon. 2/m : B2/m
9.BE.X	Asimowite	Fe²⁺₄O(Si₂O₇)	Orth. mmm (2/m 2/m 2/m) : Imma
9.BE.	Moxuanxueite	NaCa₆Zr(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.	Alexkuznetsovite-(Ce)	Ce₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Biraite-(La)	La₂Fe²⁺(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Zinkgruvanite	Ba₄Mn²⁺₄Fe³⁺₂(Si₂O₇)₂(SO₄)₂O₂(OH)₂	Tric. 1 : P1
9.BE.	Madeiraite	Na₂Ca₂Fe₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.	Bortolanite	Ca₂(Ca_1.5Zr_0.5)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂	Tric. 1 : P1
9.BE.	Nacareniobsite-(Y)	Na₃Ca₃YNb(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.	Pilanesbergite	Na₂Ca₂Fe₂Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.	Alfredcasparite	Sr₂TiO(Si₂O₇)	Tet. 4mm : P4bm
9.BE.02	Wadsleyite	Mg₄O(Si₂O₇)	Orth. mmm (2/m 2/m 2/m) : Imma
9.BE.05	Hennomartinite	SrMn³⁺₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05	Lawsonite	CaAl₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05	Noelbensonite	BaMn³⁺₂(Si₂O₇)(OH)₂ · H₂O	Orth. mm2
9.BE.05	Itoigawaite	SrAl₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05	Cortesognoite	CaV₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.07	Ilvaite	CaFe³⁺Fe²⁺₂(Si₂O₇)O(OH)	Orth. mmm (2/m 2/m 2/m)
9.BE.07	Manganilvaite	CaFe²⁺Fe³⁺Mn²⁺(Si₂O₇)O(OH)	Mon. 2/m : P2₁/b
9.BE.07	Amamoorite	CaMn²⁺₂Mn³⁺(Si₂O₇)O(OH)	Mon. 2/m : P2₁/b
9.BE.10	Suolunite	Ca₂(H₂Si₂O₇) · H₂O	Orth. mm2 : Fdd2
9.BE.12	Jaffeite	Ca₆(Si₂O₇)(OH)₆	Trig. 3 : P3
9.BE.15	Fresnoite	Ba₂Ti(Si₂O₇)O	Tet. 4mm : P4bm
9.BE.17	Baghdadite	Ca₆Zr₂(Si₂O₇)₂O₄	Mon. 2/m : P2₁/b
9.BE.17	Burpalite	Na₂CaZr(Si₂O₇)F₂	Mon. 2/m : P2₁/b
9.BE.17	Cuspidine	Ca₈(Si₂O₇)₂F₄	Mon. 2/m : P2₁/b
9.BE.17	Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃	Tric. 1 : P1
9.BE.17	Janhaugite	(Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂	Mon. 2/m : P2₁/m
9.BE.17	Låvenite	Na₂Ca₂Mn₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.17	Niocalite	(Ca,Nb)₄(Si₂O₇)(O,OH,F)₂	Mon. m
9.BE.17	Normandite	NaCa(Mn,Fe)(Ti,Nb,Zr)(Si₂O₇)OF	Mon. 2/m : P2₁/b
9.BE.17	Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F	Mon. 2 : P2₁
9.BE.20	Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂	Mon. 2/m : P2₁/b
9.BE.20	Nacareniobsite-(Ce)	Na₃Ca₃(Ce,REE)Nb(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.20	Roumaite	(Ca,Na,REE,◻)₇(Nb,Ti)[Si₂O₇]₂OF₃	Mon. m : Bb
9.BE.20	Rinkite-(Y)	Na₂Ca₄YTi(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.22	Götzenite	NaCa₆Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Hainite-(Y)	Na₂Ca₄(Y,REE)Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆	Tric. 1 : P1
9.BE.22	Kochite	Na₃Ca₂MnZrTi(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Fogoite-(Y)	Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.23	Dovyrenite	Ca₆Zr(Si₂O₇)₂(OH)₄	Orth. mmm (2/m 2/m 2/m) : Pnnm
9.BE.25	Barytolamprophyllite	(Ba,Na)₂(Na,Ti,Fe³⁺)₄Ti₂(Si₂O₇)₂O(OH,F)	Mon.
9.BE.25	Ericssonite	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Mon. 2/m : B2/m
9.BE.25	Lamprophyllite	(Na,Mn²⁺)₃(Sr,Na)₂(Ti,Fe³⁺)₃(Si₂O₇)₂O₂(OH,O,F)₂	Mon. 2/m
9.BE.25	Ericssonite-2O	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Orth.
9.BE.25	Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂	Mon. 2/m : P2/b
9.BE.25	Nabalamprophyllite	(BaNa)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	Mon. 2/m : P2/m
9.BE.25	Grenmarite	Na₄MnZr₃(Si₂O₇)₂O₂F₂	Mon. 2/m : P2/b
9.BE.25	Schüllerite	Ba₂Na(Mn,Ca)(Fe³⁺,Mg,Fe²⁺)₂Ti₂(Si₂O₇)₂(O,F)₄	Tric. 1 : P1
9.BE.25	Kazanskyite	BaNa₃Ti₂Nb(Si₂O₇)₂O₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.25	Lileyite	Ba₂(Na,Fe,Ca)₃MgTi₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Emmerichite	Ba₂Na(Na,Fe²⁺)₂(Fe³⁺,Mg)Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Saamite	Ba◻Na₃Ti₂Nb(Si₂O₇)₂O₂(OH)F(H₂O)₂	Tric. 1 : P1
9.BE.25	Fluorlamprophyllite	Na₃(SrNa)Ti₃(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Fluorbarytolamprophyllite	(Ba,Sr)₂[(Na,Fe²⁺)₃(Ti,Mg)F₂][Ti₂(Si₂O₇)₂O₂]	Mon. 2/m : B2/m
9.BE.27	Murmanite	Na₂Ti₂(Si₂O₇)O₂ · 2H₂O	Tric. 1 : P1
9.BE.27	Vigrishinite	NaZnTi₄(Si₂O₇)₂O₃(OH)(H₂O)₄	Tric. 1 : P1
9.BE.27	Kolskyite	CaNa₂Ti₄(Si₂O₇)₂O₄(H₂O)₇	Tric. 1 : P1
9.BE.27	Selivanovaite	NaFe³⁺Ti₄(Si₂O₇)₂O₄(H₂O)₄	Tric. 1 : P1
9.BE.30	Epistolite	(Na◻)Nb₂Na₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.32	Lomonosovite	Na₅Ti₂(Si₂O₇)(PO₄)O₂	Tric. 1 : P1
9.BE.35	Vuonnemite	Na₁₁Ti⁴⁺Nb₂(Si₂O₇)₂(PO₄)₂O₃(F,OH)	Tric.
9.BE.37	Sobolevite	Na₁₃Ca₂Mn₂Ti₃(Si₂O₇)₂(PO₄)₄O₃F₃	Mon. m : Pb
9.BE.40	Innelite	Ba₄Ti₂Na(NaMn²⁺)Ti(Si₂O₇)₂[(SO₄)(PO₄)]O₂[O(OH)]	Tric. 1 : P1
9.BE.40	Phosphoinnelite	Na₃Ba₄Ti₃(Si₂O₇)₂(PO₄,SO₄)₂O₂F	Tric.
9.BE.42	Yoshimuraite	Ba₂Mn₂Ti(Si₂O₇)(PO₄)O(OH)	Tric. 1 : P1
9.BE.45	Quadruphite	Na₆Na₂(CaNa)₂Na₂Ti₂Na₂Ti₂(Si₂O₇)₂(PO₄)₄O₄F₂	Tric. 1 : P1
9.BE.47	Polyphite	Na₅(Na₄Ca₂)Ti₂(Si₂O₇)(PO₄)₃O₂F₂	Tric. 1 : P1
9.BE.50	Bornemanite	Na₆BaTi₂Nb(Si₂O₇)₂(PO₄)O₂(OH)F	Tric. 1 : P1
9.BE.50	Shkatulkalite	Na₂Nb₂Na₃Ti(Si₂O₇)₂O₂(FO)(H₂O)₄(H₂O)₃	Tric. 1 : P1
9.BE.55	Bafertisite	Ba₂Fe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂	Tric.
9.BE.55	Hejtmanite	Ba₂Mn²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂	Tric. 1
9.BE.55	Bykovaite	(Ba,Na,K)₂(Na,Ti,Mn)₄(Ti,Nb)₂(Si₂O₇)₂O₂(H₂O,F,OH)₂ · 3.5H₂O	Mon. 2/m
9.BE.55	Nechelyustovite	(Ba,Sr,K)₂(Na,Ti,Mn)₄(Ti,Nb)₂(Si₂O₇)₂O₂(O,H₂O,F)₂ · 4.5H₂O	Mon. 2/m : B2/m
9.BE.60	Delindeite	(Na,K)₂(Ba,Ca)₂(Ti,Fe,Al)₃(Si₂O₇)₂O₂(OH)₂ · 2H₂O	Mon. 2/m : B2/m
9.BE.62	Orthochevkinite	(Ce,La,Ca,Na,Th)₄(Fe²⁺,Mg)₂(Ti,Fe³⁺)₃Si₄O₂₂	Orth.
9.BE.62 va	Strontium Perrierite	(Ce,Sr,La,Ca)₄Fe²⁺(Ti,Zr,Fe)₂Ti₂(Si₂O₇)₂O₈
9.BE.62	Chevkinite-(Nd)	(Nd,REE)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈ ?
9.BE.62	Perrierite-(Nd)	Nd₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈ ?
9.BE.65	Bussenite	Na₂Ba₂Fe²⁺Ti(Si₂O₇)(CO₃)(OH)₃F	Tric. 1 : P1
9.BE.67	Jinshajiangite	BaNaFe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F	Tric. 1 : P1
9.BE.67	Perraultite	BaNaMn²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F	Tric. 1
9.BE.70	Karnasurtite-(Ce)	(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si₂O₇)(OH)₄ · 3H₂O	Amor.
9.BE.70	Perrierite-(Ce)	Ce₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Strontiochevkinite	(Sr,La,Ce,Ca)₄Fe²⁺(Ti,Zr)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Chevkinite-(Ce)	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂	Mon. 2/m : P2₁/b
9.BE.70	Rengeite	Sr₄ZrTi₄(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Matsubaraite	Sr₄Ti₅(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Dingdaohengite-(Ce)	(Ce,La)₄Fe²⁺(Ti,Fe²⁺,Mg,Fe²⁺)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Maoniupingite-(Ce)	(Ce,Ca)₄(Fe³⁺,Ti,Fe²⁺,◻)(Ti,Fe³⁺,Fe²⁺,Nb)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.70	Perrierite-(La)	(La,Ce,Ca)₄(Fe²⁺,Mn)(Ti,Fe³⁺,Al)₄[(Si₂O₇)O₄]₂	Mon. 2/m : P2₁/b
9.BE.70	UM2008-53-SiO:SrTiZr	Sr₄ZrTi₄(Si₂O₇)₂O₈	Orth. mmm (2/m 2/m 2/m) : Pbca
9.BE.70	Hezuolinite	(Sr,REE)₄Zr(Ti,Fe³⁺)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.72	Fersmanite	Ca₄(Na,Ca)₄(Ti,Nb)₄(Si₂O₇)₂O₈F₃	Tric.
9.BE.75	Belkovite	Ba₃(Nb,Ti)₆(Si₂O₇)₂O₁₂	Hex. 6 m2 : P6₂m
9.BE.77	Nasonite	Pb₆Ca₄(Si₂O₇)₃Cl₂	Hex. 6/m : P6₃/m
9.BE.80	Kentrolite	Pb₂Mn³⁺₂(Si₂O₇)O₂	Orth. mmm (2/m 2/m 2/m) : Pbcm
9.BE.80	Melanotekite	Pb₂Fe³⁺₂(Si₂O₇)O₂	Orth. 2 2 2 : C2 2 2₁
9.BE.82	Tilleyite	Ca₅(Si₂O₇)(CO₃)₂	Mon. 2/m : P2₁/b
9.BE.82	Alexkuznetsovite-(La)	La₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.85	Killalaite	Ca_6.4(H_0.6Si₂O₇)₂(OH)₂	Mon. 2/m : P2₁/m
9.BE.87	Stavelotite-(La)	(La,Nd,Ca)₃Mn²⁺₃Cu(Mn³⁺,Fe³⁺,Mn⁴⁺)₂₆(Si₂O₇)₆O₃₀	Trig. 3 : P3₁
9.BE.90	Biraite-(Ce)	Ce₂Fe²⁺(Si₂O₇)(CO₃)	Mon. 2/m : P2₁/b
9.BE.90	Magnesiorowlandite-(Y)	Y₄(Mg,Fe)(Si₂O₇)₂F₂	Tric. 1 : P1
9.BE.92	Cervandonite-(Ce)	(Ce,Nd,La)(Fe³⁺,Fe²⁺,Ti,Al)₃O₂(Si₂O₇)(As³⁺O₃)(OH)	Trig. 3m : R3m
9.BE.92	Chirvinskyite	(Na,Ca)₁₃(Fe,Mn,◻)₂(Ti,Zr)₅(Si₂O₇)₄(OH,O)₁₂ · 2H₂O	Tric. 1 : P1
9.BE.95	Batisivite	BaV³⁺₈Ti₆(Si₂O₇)O₂₂	Tric. 1 : P1
9.BE.95	Rusinovite	Ca₁₀(Si₂O₇)₃Cl₂	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.97	Schlüterite-(Y)	(Y,REE)₂AlSi₂O₇(OH)₂F	Mon. 2/m : P2₁/b

Fluorescence of Polyakovite-(Ce)Hide

In UV light:

none

Other InformationHide

IR Spectrum:

IR spectrum nearly identical to chevkinite group minerals.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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References for Polyakovite-(Ce)Hide

Reference List:

forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=17577

Popov, V.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., McCammon, C., and Bazhenova, L.F. (2001) Polyakovite-(Ce), (REE,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2Si4O22, a new metamict mineral species from the Ilmen Mountains, southern Urals, Russia: mineral description and crystal chemistry. Canadian Mineralogist: 39: 1095-1104.

Jambor, J.L. and Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.

Popov, V.A. (2021): Parageneses of polyakovite-(Ce) in carbonatites and ultramafites of the Ilmen mountains (South Urals, Russia). Zapiski RMO: 150: 88-95.

(2023) Polyakovite-(Ce) Handbook of Mineralogy. Mineralogical Society of America

Localities for Polyakovite-(Ce)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

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Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Russia (TL)
Chelyabinsk Oblast Miass ⓘ Pit No. 97 (TL)	Mineralogical Record 33: 167. Popov, V.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., McCammon, C., and Bazhenova, L.F. (2001) Polyakovite-(Ce), (REE,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2Si4O22, a new metamict mineral species from the Ilmen Mountains, southern Urals, Russia: mineral description and crystal chemistry. Canadian Mineralogist: 39: 1095-1104. Jambor, J.L. and Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.

Zimbabwe
Matabeleland South Beitbridge District ⓘ River Ranch Mine	Kopylova, M.G., Rickard, R.S., Kleyenstueber, A., Taylor, W.R., Gurney, J.J., and Daniels, L.R.M. (1997) First occurrence of strontian K-Cr loparite and Cr-chevkinite in diamonds. Russian Geol. Geophys.: 38: 405–420 (English translation from Geol. Geofiz.). *Jambor, John L., Roberts, Andrew C. (1998) New mineral names. American Mineralogist, 83. 400-403*

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Polyakovite-(Ce)

About Polyakovite-(Ce)Hide

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IMA Classification of Polyakovite-(Ce)Hide

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Optical Data of Polyakovite-(Ce)Hide

Chemistry of Polyakovite-(Ce)Hide

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Localities for Polyakovite-(Ce)Hide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide