Quick Links : The Mindat Manual The Rock H. Currier Digital Library Mindat Newsletter [Free Download]

Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Contact Us Advertise on Mindat

Donate to Mindat Corporate Sponsorship Sponsor a Page Sponsored Pages Mindat Advertisers Advertise on Mindat

Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time Explore Fossils

Minerals by Properties Minerals by Chemistry Mineral Visual Explorer Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz Time Machine

Photo Search Photo Galleries Search by Color Photo Colour Explorer New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Polyakovite-(Ce)

A valid IMA mineral species

This page is currently not sponsored. Click here to sponsor this page.

Photos of Polyakovite-(Ce) (5)Discuss Polyakovite-(Ce)

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

Edit Polyakovite-(Ce)Add Synonym Edit CIF structures Clear Cache

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

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

Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Polyakovite-(Ce)

Pit No. 97, Miass, Chelyabinsk Oblast, Russia

Hide all sections | Show all sections

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

The Cr analogue of perrierite-(Ce) and longshoushanite-(Ce).

Unique IdentifiersHide

Mindat ID:

10397

Long-form identifier:

mindat:1:1:10397:8

IMA Classification of Polyakovite-(Ce)Hide

IMA status:

Approved

IMA Formula:

(Ce³⁺,Ca)₄MgCr³⁺₂(Ti⁴⁺,Nb⁵⁺)₂Si₄O₂₂

Approval year:

1998

Classification of Polyakovite-(Ce)Hide

Strunz-mindat (2026):

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 for Standard
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

Element Weights:

Element	% weight
Ce	44.879 %
O	28.186 %
Si	8.996 %
Cr	8.327 %
Ti	7.666 %
Mg	1.946 %

Calculated from ideal end-member formula.

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

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
Console Off | On | Grey | Yellow

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

Dutch:Polyakoviet-(Ce)

German:Polyakovit-(Ce)

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 Chevkinite Subgroup:

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)	Ce₃CaMnTiFe³⁺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,Fe³⁺)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

Associations Based on Photo Data:

2 photos of Polyakovite-(Ce) associated with Fluoro-richterite	Na(CaNa)Mg₅(Si₈O₂₂)F₂
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.	Zinkgruvanite	Ba₄Mn²⁺₄Fe³⁺₂(Si₂O₇)₂(SO₄)₂O₂(OH)₂	Tric. 1 : P1
9.BE.	Calciomurmanite	(Na,◻)₂Ca(Ti,Mg,Nb)₄[Si₂O₇]₂O₂(OH,O)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Cámaraite	Ba₃Na(Fe²⁺,Mn)₈Ti₄(Si₂O₇)₄O₄(OH,F)₇	Tric. 1
9.BE.	Alfredcasparite	Sr₂TiO(Si₂O₇)	Tet. 4mm : P4bm
9.BE.	Batievaite-(Y)	Y₂Ca₂Ti(Si₂O₇)₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Nacareniobsite-(Y)	Na₃Ca₃YNb(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.	Alexkuznetsovite-(Ce)	Ce₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Bobshannonite	Na₂KBa(Mn,Na)₈(Nb,Ti)₄(Si₂O₇)₄O₄(OH)₄(O,F)₂	Tric.
9.BE.	Paralomonosovite	Na₆◻₄Ti₄(Si₂O₇)₂[PO₃OH][PO₂(OH)₂]O₂(OF)	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.	Longshoushanite-(Ce)	Ce₄MgAl₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.	Moxuanxueite	NaCa₆Zr(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.	Delhuyarite-(Ce)	Ce₄Mg(Fe³⁺,W)₃◻(Si₂O₇)₂O₆(OH)₂	Mon. 2/m : B2/m
9.BE.	Christofschäferite-(Ce)	Ce₃CaMnTiFe³⁺Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/m
9.BE.X	Asimowite	Fe²⁺₄O(Si₂O₇)	Orth. mmm(2/m2/m2/m) : Imma
9.BE.	Biraite-(La)	La₂Fe²⁺(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Pilanesbergite	Na₂Ca₂Fe₂Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.02	Wadsleyite	Mg₄O(Si₂O₇)	Orth. mmm(2/m2/m2/m) : Imma
9.BE.02	Ohtaniite	Mg₃(Si_0.5◻_0.5)Si₂O₈	Orth. mmm(2/m2/m2/m) : Imma
9.BE.05	Lawsonite	CaAl₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.05	Hennomartinite	SrMn³⁺₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.05	Cortesognoite	CaV₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/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/m2/m2/m) : Cmcm
9.BE.07	Ilvaite	CaFe³⁺Fe²⁺₂(Si₂O₇)O(OH)	Orth. mmm(2/m2/m2/m)
9.BE.07	Amamoorite	CaMn²⁺₂Mn³⁺(Si₂O₇)O(OH)	Mon. 2/m : P2₁/b
9.BE.07	Manganilvaite	CaFe²⁺Fe³⁺Mn²⁺(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	Janhaugite	(Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂	Mon. 2/m : P2₁/m
9.BE.17	Burpalite	Na₂CaZr(Si₂O₇)F₂	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	Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃	Tric. 1 : P1
9.BE.17	Låvenite	Na₂Ca₂Mn₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.17	Cuspidine	Ca₈(Si₂O₇)₂F₄	Mon. 2/m : P2₁/b
9.BE.17	Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F	Mon. 2 : P2₁
9.BE.17	Baghdadite	Ca₆Zr₂(Si₂O₇)₂O₄	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-(Ce)	(Ca₃Ce)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂	Mon. 2/m : P2₁/b
9.BE.20	Nacareniobsite-(Nd)	Ca₂(CaNd)Na₃Nb(Si₂O₇)₂(OF)F₂	Mon. 2/m : P2₁/b
9.BE.20	Rinkite-(Y)	Na₂Ca₄YTi(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
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.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	Götzenite	NaCa₆Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Fogoite-(Y)	Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Kochite	Na₃Ca₂MnZrTi(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.23	Dovyrenite	Ca₆Zr(Si₂O₇)₂(OH)₄	Orth. mmm(2/m2/m2/m) : Pnnm
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	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	Schüllerite	Ba₂Na(Mn,Ca)(Fe³⁺,Mg,Fe²⁺)₂Ti₂(Si₂O₇)₂(O,F)₄	Tric. 1 : P1
9.BE.25	Ericssonite	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Mon. 2/m : B2/m
9.BE.25	Grenmarite	Na₄MnZr₃(Si₂O₇)₂O₂F₂	Mon. 2/m : P2/b
9.BE.25	Kazanskyite	BaNa₃Ti₂Nb(Si₂O₇)₂O₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.25	Saamite	Ba◻Na₃Ti₂Nb(Si₂O₇)₂O₂(OH)F(H₂O)₂	Tric. 1 : P1
9.BE.25	Emmerichite	Ba₂Na(Na,Fe²⁺)₂(Fe³⁺,Mg)Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Barytolamprophyllite	(Ba,Na)₂(Na,Ti,Fe³⁺)₄Ti₂(Si₂O₇)₂O(OH,F)	Mon.
9.BE.25	'Ericssonite-2O'	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Orth.
9.BE.25	Fluorbarytolamprophyllite	(Ba,Sr)₂[(Na,Fe²⁺)₃(Ti,Mg)F₂][Ti₂(Si₂O₇)₂O₂]	Mon. 2/m : B2/m
9.BE.25	Fluorlamprophyllite	Na₃(SrNa)Ti₃(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Lileyite	Ba₂(Na,Fe,Ca)₃MgTi₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.27	Kolskyite	CaNa₂Ti₄(Si₂O₇)₂O₄(H₂O)₇	Tric. 1 : P1
9.BE.27	Vigrishinite	NaZnTi₄(Si₂O₇)₂O₃(OH)(H₂O)₄	Tric. 1 : P1
9.BE.27	Selivanovaite	NaFe³⁺Ti₄(Si₂O₇)₂O₄(H₂O)₄	Tric. 1 : P1
9.BE.27	Murmanite	Na₂Ti₂(Si₂O₇)O₂ · 2H₂O	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	Ferroinnelite	Ba₄Ti₂Na(NaFe²⁺)Ti(Si₂O₇)₂[(SO₄)(PO₄)]O₂[O(OH)]	Tric. 1 : P1
9.BE.40	Phosphoinnelite	Na₃Ba₄Ti₃(Si₂O₇)₂(PO₄,SO₄)₂O₂F	Tric.
9.BE.40	Innelite	Ba₄Ti₂Na(NaMn²⁺)Ti(Si₂O₇)₂[(SO₄)(PO₄)]O₂[O(OH)]	Tric. 1 : P1
9.BE.42	Yoshimuraite	Ba₂Mn₂Ti(Si₂O₇)(PO₄)O(OH)	Tric. 1 : P1
9.BE.42	Horiite	Ba₂Mn₂Mn₄Ti₂(Si₂O₇)₂(PO₄)₂O₂(OH)₂	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	Shkatulkalite	Na₂Nb₂Na₃Ti(Si₂O₇)₂O₂(FO)(H₂O)₄(H₂O)₃	Tric. 1 : P1
9.BE.50	Bornemanite	Na₆BaTi₂Nb(Si₂O₇)₂(PO₄)O₂(OH)F	Tric. 1 : P1
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.55	Bafertisite	Ba₂Fe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂	Tric.
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	Dingdaohengite-(Ce)	(Ce,La)₄Fe²⁺(Ti,Fe²⁺,Mg,Fe³⁺)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Perrierite-(Ce)	Ce₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Karnasurtite-(Ce)	(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si₂O₇)(OH)₄ · 3H₂O	Amor.
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	Matsubaraite	Sr₄Ti₅(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Rengeite	Sr₄ZrTi₄(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Hezuolinite	(Sr,REE)₄Zr(Ti,Fe³⁺)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.70	'UM2008-53-SiO:SrTiZr'	Sr₄ZrTi₄(Si₂O₇)₂O₈	Orth. mmm(2/m2/m2/m) : Pbca
9.BE.70	Chevkinite-(Ce)	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂	Mon. 2/m : P2₁/b
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	Strontiochevkinite	(Sr,La,Ce,Ca)₄Fe²⁺(Ti,Zr)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
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. 6m2 : P62m
9.BE.77	Nasonite	Pb₆Ca₄(Si₂O₇)₃Cl₂	Hex. 6/m : P6₃/m
9.BE.80	Melanotekite	Pb₂Fe³⁺₂(Si₂O₇)O₂	Orth. 222 : C222₁
9.BE.80	Kentrolite	Pb₂Mn³⁺₂(Si₂O₇)O₂	Orth. mmm(2/m2/m2/m) : Pbcm
9.BE.82	Alexkuznetsovite-(La)	La₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.82	Tilleyite	Ca₅(Si₂O₇)(CO₃)₂	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	Magnesiorowlandite-(Y)	Y₄(Mg,Fe)(Si₂O₇)₂F₂	Tric. 1 : P1
9.BE.90	Biraite-(Ce)	Ce₂Fe²⁺(Si₂O₇)(CO₃)	Mon. 2/m : P2₁/b
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	Rusinovite	Ca₁₀(Si₂O₇)₃Cl₂	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.95	Batisivite	BaV³⁺₈Ti₆(Si₂O₇)O₂₂	Tric. 1 : P1
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.

Internet Links for Polyakovite-(Ce)Hide

mindat.org URL:

https://www.mindat.org/min-10397.html
Please feel free to link to this page.

Search Engines:

Look for Polyakovite-(Ce) on Google

Look for Polyakovite-(Ce) images on Google

Look for Polyakovite-(Ce) on Bing

Look for Polyakovite-(Ce) images on Bing

Look for Polyakovite-(Ce) on DuckDuckGo

Look for Polyakovite-(Ce) images on DuckDuckGo

Look for Polyakovite-(Ce) in the Rock H. Currier Digital Library

External Links:

Look for Polyakovite-(Ce) on Webmineral

Look for Polyakovite-(Ce) on Wikipedia

Look for Polyakovite-(Ce) on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for Polyakovite-(Ce)Hide

Reference List:

Popov, V. A., Pautov, L. A., Sokolova, E., Hawthorne, F. C., McCammon, C., 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. The Canadian Mineralogist, 39 (4). 1095-1104 doi:10.2113/gscanmin.39.4.1095

Jambor, J.L., 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.

(2021) Polyakovite-(Ce). Handbook of Mineralogy. Mineralogical Society of America

Localities for Polyakovite-(Ce)Hide

Showing 2 localities.

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

symbol next to localities in the list can be used to jump to that position on the map.

Hide all sections | Show all sections

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)	Popov et al. (2001) +2 other references

Zimbabwe
Matabeleland South Beitbridge District ⓘ River Ranch Mine	Kopylova et al. (1997) +1 other reference

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 14:55:34 Page updated: August 19, 2026 10:15:55

Go to top of page

Polyakovite-(Ce)

About Polyakovite-(Ce)Hide

Unique IdentifiersHide

IMA Classification of Polyakovite-(Ce)Hide

Classification of Polyakovite-(Ce)Hide

Mineral SymbolsHide

Physical Properties of Polyakovite-(Ce)Hide

Optical Data of Polyakovite-(Ce)Hide

Chemistry of Polyakovite-(Ce)Hide

Crystallography of Polyakovite-(Ce)Hide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of Polyakovite-(Ce)Hide

Synonyms of Polyakovite-(Ce)Hide

Other Language Names for Polyakovite-(Ce)Hide

Relationship of Polyakovite-(Ce) to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of Polyakovite-(Ce)Hide

Other InformationHide

Internet Links for Polyakovite-(Ce)Hide

References for Polyakovite-(Ce)Hide

Localities for Polyakovite-(Ce)Hide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide