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Paraershovite

A valid IMA mineral species

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Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

Paraershovite

Yukspor Mountain, Murmansk Oblast, Russia

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About ParaershoviteHide

Formula:

Na₃K₃Fe³⁺₂Si₈O₂₀(OH)₄ · 4H₂O

Colour:

yellow with orange or pinkish shades

Lustre:

Vitreous

Specific Gravity:

2.60

Crystal System:

Triclinic

Name:

The name paraershovite [from the Greek para (close by) and ershovite] recognizes the close structural and chemical relations between the new mineral and its closest analogue

Type Locality:

ⓘ Yukspor Mountain, Murmansk Oblast, Russia

Fe³⁺-analogue of ershovite.

Unique IdentifiersHide

Mindat ID:

39560

Long-form identifier:

mindat:1:1:39560:3

IMA Classification of ParaershoviteHide

IMA status:

Approved

IMA Formula:

Na₃K₃Fe³⁺₂Si₈O₂₀(OH)₄·4H₂O

Approval year:

2009

Classification of ParaershoviteHide

Strunz-mindat (2026):

9.DF.15

9 : SILICATES (Germanates)
D : Inosilicates
F : Inosilicates with 2-periodic multiple chains

Dana 8th ed.:

66.6.3.2

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
6 : Double-Width Unbranched Chains, W=2 with P=2 non-amphibole configuration

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
Psh	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 ParaershoviteHide

Lustre:

Vitreous

Transparency:

Transparent, Translucent

Colour:

Yellow with orange or pinkish shades

Streak:

White

Tenacity:

Brittle

Cleavage:

Perfect
{100}

Fracture:

Splintery, Step-Like

Density:

2.60(3) g/cm³ (Measured) 2.584 g/cm³ (Calculated)

Optical Data of ParaershoviteHide

Type:

Biaxial (+)

RI values:

n_α = 1.569(2) n_β = 1.583(2) n_γ = 1.602(2)

2V:

Measured: 80° (3), Calculated: 82°

Max. Birefringence:

δ = 0.033
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

Thickness: 30 µm

Stage rotation: 0°

Dispersion:

dispersion r > v (weak)

Pleochroism:

Non-pleochroic

Chemistry of ParaershoviteHide

Mindat Formula:

Na₃K₃Fe³⁺₂Si₈O₂₀(OH)₄ · 4H₂O

Element Weights:

Element	% weight
O	45.586 %
Si	22.864 %
K	11.936 %
Fe	11.365 %
Na	7.018 %
H	1.231 %

Calculated from ideal end-member formula.

Elements listed:

Fe, H, K, Na, O, Si - search for minerals with similar chemistry

Crystallography of ParaershoviteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Cell Parameters:

a = 10.1978(5) Å, b = 12.0155(6) Å, c = 5.2263(3) Å
α = 103.439(1)°, β = 96.020(1)°, γ = 91.683(1)°

Ratio:

a:b:c = 0.849 : 1 : 0.435

Unit Cell V:

618.46 Å³ (Calculated from Unit Cell)

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)
0006330	Paraershovite	Khomyakov A P, Camara F, Sokolova E, Abdu Y, Hawthorne F C (2010) Paraershovite, Na3K3Fe3+2(Si4O10OH)2(OH)2(H2O)4, a new mineral species from the Khibina Alkaline massif, Kola Peninsula, Russia: Description and crystal structure The Canadian Mineralogist 48 279-290		2010	the Khibina Alkaline massif, Kola Peninsula, Russia	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Paraershovite'
loop_
_publ_author_name
'Khomyakov A P'
'Camara F'
'Sokolova E'
'Abdu Y'
'Hawthorne F C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 48 
_journal_year 2010
_journal_page_first 279
_journal_page_last 290
_publ_section_title
;
 Paraershovite, Na3K3Fe3+2(Si4O10OH)2(OH)2(H2O)4, a new mineral species from the
 Khibina Alkaline massif, Kola Peninsula, Russia: Description and crystal structure
;
_database_code_amcsd 0006330
_chemical_compound_source 'the Khibina Alkaline massif, Kola Peninsula, Russia'
_chemical_formula_sum 'K2.92 Na2.44 (Fe1.74 Mn1.36 Ti.76 Mg.14) Si8 O28 H12'
_cell_length_a 10.1978
_cell_length_b 12.0155
_cell_length_c 5.2263
_cell_angle_alpha 103.439
_cell_angle_beta 96.020
_cell_angle_gamma 91.683
_cell_volume 618.460
_exptl_crystal_density_diffrn      2.864
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-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
K(1)   0.56870   0.13502   0.82030   0.96000   0.02850
K(2)   0.50000   0.50000   0.50000   1.00000   0.03390
Na(1)   0.97570   0.86110   0.46090   0.81000   0.03180
Na(2)   0.99010   0.74100   0.88550   0.41000   0.03100
Fe2+M   0.00552   0.42473   0.70056   0.87000   0.01180
Mn2+M   0.00552   0.42473   0.70056   0.68000   0.01180
TiM   0.00552   0.42473   0.70056   0.38000   0.01180
MgM   0.00552   0.42473   0.70056   0.07000   0.01180
Si(1)   0.73752   0.28343   0.42910   1.00000   0.01220
Si(2)   0.71648   0.67365   0.13600   1.00000   0.01330
Si(3)   0.73373   0.41941   0.99380   1.00000   0.01160
Si(4)   0.67806   0.81252   0.70100   1.00000   0.01720
O(1)   0.67350   0.35220   0.69540   1.00000   0.01590
O(2)   0.89520   0.29650   0.48220   1.00000   0.01660
O(3)   0.65250   0.72840   0.89820   1.00000   0.02410
O(4)   0.87350   0.68320   0.17470   1.00000   0.01760
O(5)   0.89190   0.43920   0.01760   1.00000   0.01340
O(6)   0.82330   0.87240   0.76390   1.00000   0.03340
O(7)   0.66020   0.53970   0.05580   1.00000   0.01930
O(8)   0.65030   0.73230   0.40040   1.00000   0.02280
O(9)   0.68320   0.34680   0.19410   1.00000   0.01790
O(10)   0.67730   0.15410   0.35230   1.00000   0.02020
O(11)   0.56530   0.90520   0.73030   1.00000   0.02380
O(12)   0.89330   0.54580   0.57330   1.00000   0.01710
O(13)   0.85810   0.99250   0.28310   1.00000   0.06600
O(14A)   0.88900   0.15600   0.90400   0.50000   0.05100
O(14B)   0.85600   0.11300   0.82200   0.50000   0.05100
H(1)   0.48100   0.87500   0.69200   1.00000   0.03566
H(2)   0.88200   0.60300   0.71400   1.00000   0.02569
H(3)   0.84700   0.95300   0.11100   1.00000   0.09960
H(4)   0.78900   0.03800   0.31000   1.00000   0.09960
H(5)   0.96900   0.17900   0.01000   0.50000   0.07653
H(6)   0.86000   0.07900   0.91000   0.50000   0.07653
H(7)   0.78600   0.13000   0.66400   0.50000   0.07653
H(8)   0.79900   0.13000   0.98000   0.50000   0.07653
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
K(1) 0.04370 0.02260 0.01810 -0.00250 0.00140 0.00410
K(2) 0.03550 0.04270 0.02790 0.02470 0.00820 0.01250
Na(1) 0.02400 0.02300 0.04500 -0.00010 -0.00270 0.00430
Na(2) 0.02700 0.03500 0.03400 0.00900 0.01600 0.01100
Fe2+M 0.00850 0.01400 0.01190 0.00190 0.00010 0.00120
Mn2+M 0.00850 0.01400 0.01190 0.00190 0.00010 0.00120
TiM 0.00850 0.01400 0.01190 0.00190 0.00010 0.00120
MgM 0.00850 0.01400 0.01190 0.00190 0.00010 0.00120
Si(1) 0.01030 0.01440 0.01180 0.00140 0.00210 0.00240
Si(2) 0.00990 0.01520 0.01480 0.00320 0.00170 0.00330
Si(3) 0.00880 0.01370 0.01170 0.00140 0.00170 0.00160
Si(4) 0.01910 0.01670 0.01570 0.00350 0.00340 0.00270
O(1) 0.00900 0.02300 0.01500 0.00220 0.00240 0.00400
O(2) 0.01100 0.02100 0.01600 0.00200 0.00140 0.00160
O(3) 0.01800 0.03400 0.02300 0.00500 0.00100 0.01300
O(4) 0.01000 0.02100 0.02200 0.00180 0.00080 0.00600
O(5) 0.00900 0.02100 0.01000 -0.00050 0.00110 0.00210
O(6) 0.01900 0.03700 0.03900 -0.00300 0.00300 -0.00100
O(7) 0.01100 0.01700 0.02900 0.00330 0.00240 0.00300
O(8) 0.01800 0.02900 0.01800 0.00400 0.00400 -0.00100
O(9) 0.01200 0.02700 0.01400 0.00150 0.00060 0.00600
O(10) 0.01700 0.01900 0.02300 -0.00100 0.00300 0.00200
O(11) 0.02000 0.01900 0.03100 0.00300 0.00200 0.00200
O(12) 0.01500 0.01900 0.01700 0.00530 0.00330 0.00200
O(13) 0.05700 0.04000 0.08300 0.02000 -0.02600 -0.01200
O(14A) 0.04000 0.05800 0.05900 0.00500 0.01200 0.01800
O(14B) 0.04000 0.05800 0.05900 0.00500 0.01200 0.01800

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
11.778 Å	(100)
4.390 Å	(70)
4.109 Å	(60)
3.390 Å	(50)
3.012 Å	(70)
2.730 Å	(60)
2.606 Å	(70)

Locality:

Yukspor Mountain, Murmansk Oblast, Russia

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ParaershoviteHide

Type Locality:

ⓘ Yukspor Mountain, Murmansk Oblast, Russia

General Appearance of Type Material:

equant (100) platy and [001] elongate prismatic crystals up to 0.5–1 mm and aggregates up to 2–3 mm, sporadically scattered
in the pegmatite matrix.

Place of Conservation of Type Material:

Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (catalogue number 3793).

Geological Setting of Type Material:

hyperagpaitic pegmatite occurring in ijolite–urtite.

Associated Minerals at Type Locality:

Sodalite	Aegirine	Arfvedsonite	Pectolite	Shcherbakovite
Lamprophyllite	Lomonosovite	Shafranovskite	Villiaumite	Natrophosphate

Synonyms of ParaershoviteHide

IMA2009-025

Other Language Names for ParaershoviteHide

Dutch:Paraershoviet

German:Paraershovit

Related Minerals - Strunz-mindat Grouping Hide

9.DF.	Bohseite	Ca₄Be_3+xAl_1-xSi₉O_25-x(OH)_3+x	Orth. mmm(2/m2/m2/m) : Cmcm
9.DF.05	Jimthompsonite	(Mg,Fe)₅Si₆O₁₆(OH)₂	Orth. mmm(2/m2/m2/m) : Pbca
9.DF.05	Clinojimthompsonite	(Mg,Fe)₅Si₆O₁₆(OH)₂	Mon. 2/m : B2/b
9.DF.05	Chesterite	(Mg,Fe)₁₇Si₂₀O₅₄(OH)₆	Orth. mm2
9.DF.15	Ershovite	Na₄K₃(Fe,Mn,Ti)₂Si₈O₂₂(OH)₄ · 4H₂O	Tric. 1 : P1
9.DF.20	Tvedalite	(Ca,Mn)₄Be₃Si₆O₁₇(OH)₄ · 3H₂O	Orth.
9.DF.25	Bavenite	Ca₄Be₂Al₂Si₉O₂₆(OH)₂	Orth. mm2
9.DF.30	Bigcreekite	BaSi₂O₅ · 4H₂O	Orth. mmm(2/m2/m2/m) : Pnma

RadioactivityHide

Radioactivity:

Element	% Content	Activity (Bq/kg)	Radiation Type
Uranium (U)	0.0000%	0	α, β, γ
Thorium (Th)	0.0000%	0	α, β, γ
Potassium (K)	11.9358%	3,700	β, γ

For comparison:

Banana: ~15 Bq per fruit
Granite: 1,000–3,000 Bq/kg
EU exemption limit: 10,000 Bq/kg

Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.

Interactive Simulator:

Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!

Mass of radioactive mineral:

Shielding material:

Activity: –

Distance	Dose rate	Risk
1 cm
10 cm
1 m

The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μ_shield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((A_U × Γ_U) + (A_Th × Γ_Th) + (A_K × Γ_K)) / r² × μ_shield

Fluorescence of ParaershoviteHide

In UV light:

none

Other InformationHide

Notes:

Paraershovite readily decomposes at room temperature in a ceramic container with 50% HCl and HNO3 solution

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 ParaershoviteHide

mindat.org URL:

https://www.mindat.org/min-39560.html
Please feel free to link to this page.

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External Links:

Look for Paraershovite on Webmineral

Look for Paraershovite on Wikipedia

Look for Paraershovite 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 ParaershoviteHide

Reference List:

Khomyakov, A. P., Camara, F., Sokolova, E., Abdu, Y., Hawthorne, F. C. (2010) Paraershovite, Na₃K₃Fe³⁺₂(Si₄O₁₀OH)₂(OH)₂(H₂O)₄, a new mineral species from the Khibina Alkaline massif, Kola Peninsula, Russia: Description and crystal structure. The Canadian Mineralogist, 48 (2) 279-290 doi:10.3749/canmin.48.2.279

(2015) Paraershovite. Handbook of Mineralogy. Mineralogical Society of America

Localities for ParaershoviteHide

Showing 1 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)

Murmansk Oblast

ⓘ Yukspor Mountain (TL)

Khomyakov et al. (2010)

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Paraershovite

About ParaershoviteHide

Unique IdentifiersHide

IMA Classification of ParaershoviteHide

Classification of ParaershoviteHide

Mineral SymbolsHide

Physical Properties of ParaershoviteHide

Optical Data of ParaershoviteHide

Chemistry of ParaershoviteHide

Crystallography of ParaershoviteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of ParaershoviteHide

Synonyms of ParaershoviteHide

Other Language Names for ParaershoviteHide

Related Minerals - Strunz-mindat GroupingHide

RadioactivityHide

Fluorescence of ParaershoviteHide

Other InformationHide

Internet Links for ParaershoviteHide

References for ParaershoviteHide

Localities for ParaershoviteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide