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Tashelgite

A valid IMA mineral species

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Photos of Tashelgite (10)

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Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Tashelgite

Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

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About TashelgiteHide

Formula:

CaMgFe²⁺Al₉O₁₆(OH)

Colour:

Blue-green

Lustre:

Vitreous

Hardness:

7½

Specific Gravity:

3.67 (Calculated)

Crystal System:

Monoclinic

Name:

Named for the type locality.

Type Locality:

ⓘ Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

Type locality is a calc-skarnoid occurrence near the mouth of the Tashelga River, Kuznetsky Alatau, Gorny Shoria (53°22′60.3N, 88°17′07.1E).

Unique IdentifiersHide

Mindat ID:

40270

Long-form identifier:

mindat:1:1:40270:9

GUID
(UUID V4):

d5ff11a2-ef6d-425e-94f8-bdded2c4e742

IMA Classification of TashelgiteHide

IMA status:

Approved

Approval year:

2010

Classification of TashelgiteHide

Strunz-mindat (2024):

4.FG.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
G : Hydroxides with OH, without H₂O; unclassified

Dana 8th ed.:

7.11.19.

7 : MULTIPLE OXIDES
11 : Miscellaneous

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
Thg	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 TashelgiteHide

Lustre:

Vitreous

Transparency:

Transparent, Translucent

Colour:

Blue-green

Comment:

Fibrous segregations are occasionally white

Hardness:

7½ on Mohs scale

Tenacity:

Brittle

Cleavage:

None Observed

Parting:

None observed.

Density:

3.67 g/cm³ (Calculated)

Optical Data of TashelgiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.736(2) n_β = 1.746(2) n_γ = 1.750(2)

2V:

Calculated: 20°

Max Birefringence:

δ = 0.014

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

High

Dispersion:

r < v, strong

Pleochroism:

Visible

Comments:

X = blue-green, Y = light yellowish green, Z = almost colourless

Chemistry of TashelgiteHide

Mindat Formula:

CaMgFe²⁺Al₉O₁₆(OH)

Elements listed:

Al, Ca, Fe, H, Mg, O - search for minerals with similar chemistry

Common Impurities:

Crystallography of TashelgiteHide

Crystal System:

Monoclinic

Class (H-M):

m - Domatic

Space Group:

Setting:

Cell Parameters:

a = 5.6973(1) Å, b = 17.1823(4) Å, c = 23.5718(5) Å
β = 90.046(3)°

Ratio:

a:b:c = 0.332 : 1 : 1.372

Unit Cell V:

2307.5 Å³

Morphology:

Prismatic crystals elongated on [100] with main forms {001} and {010}.

Twinning:

Polysynthetic twins parallel to (001).

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)
0018315	Tashelgite	Rastsvetaeva R K, Aksenov S M, Verin I A (2010) Crystal structure of complex natural aluminum magnesium calcium iron oxide Crystallography Reports 55 563-568		2010	Tashelga River, Western Siberia, Russia	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Tashelgite'
loop_
_publ_author_name
'Rastsvetaeva R K'
'Aksenov S M'
'Verin I A'
_journal_name_full 'Crystallography Reports'
_journal_volume 55 
_journal_year 2010
_journal_page_first 563
_journal_page_last 568
_publ_section_title
;
 Crystal structure of complex natural aluminum magnesium calcium iron oxide
;
_database_code_amcsd 0018315
_chemical_compound_source 'Tashelga River, Western Siberia, Russia'
_chemical_formula_sum 'Al9 Fe Mg Ca O17 H'
_cell_length_a 5.6973
_cell_length_b 17.1823
_cell_length_c 23.5718
_cell_angle_alpha 90
_cell_angle_beta 90.0
_cell_angle_gamma 90
_cell_volume 2307.508
_exptl_crystal_density_diffrn      3.662
_symmetry_space_group_name_H-M 'P 1 c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Al1   0.95100   0.16710   0.03420   0.00988
Al2   0.46000   0.16780   0.03410   0.00823
Al3   0.95200   0.28590   0.64780   0.01393
Al4   0.45700   0.28620   0.64940   0.00507
Al5   0.69800   0.24700   0.44750   0.00545
Al6   0.44700   0.10880   0.47900   0.00874
Al7   0.95100   0.11160   0.48010   0.00887
Al8   0.45000   0.44280   0.08640   0.00570
Al9   0.95500   0.44270   0.08550   0.01165
Al10   0.21700   0.47170   0.88250   0.00811
Al11   0.70400   0.19400   0.83200   0.02026
Al12   0.20700   0.42420   0.61540   0.01089
Al13   0.95300   0.38680   0.41290   0.01267
Al14   0.45500   0.38980   0.41440   0.01267
Al15   0.70200   0.30550   0.06340   0.00684
Al16   0.20200   0.07910   0.27960   0.01646
Al17   0.19900   0.03030   0.00700   0.01393
Al18   0.96500   0.21450   0.24640   0.01267
Al19   0.44600   0.21460   0.24510   0.02153
Al20   0.95400   0.05990   0.80840   0.01520
Al21   0.94600   0.32740   0.85760   0.01773
Al22   0.45100   0.05450   0.80810   0.02280
Al23   0.44600   0.33300   0.85920   0.01646
Al24   0.20400   0.47290   0.49950   0.00887
Al25   0.70100   0.19820   0.56510   0.00887
Al26   0.71300   0.25280   0.94890   0.01267
Al27   0.70700   0.30310   0.32890   0.02026
Al28   0.19600   0.02780   0.39520   0.02026
Al29   0.70300   0.45040   0.68190   0.01393
Al30   0.70100   0.50870   0.31760   0.00507
Al31   0.70100   0.00410   0.07510   0.01140
Al32   0.71300   0.05210   0.21560   0.01646
Al33   0.18800   0.21530   0.76640   0.00760
Al34   0.20600   0.27890   0.12720   0.00507
Al35   0.19200   0.12330   0.60500   0.00887
Al36   0.20300   0.37440   0.28620   0.01013
Fe1   0.20000   0.28120   0.51720   0.01482
Fe2   0.70200   0.05470   0.93510   0.01963
Fe3   0.70500   0.11030   0.35130   0.01672
Fe4   0.20900   0.33150   0.98670   0.02254
Mg1   0.21100   0.16830   0.90780   0.01267
Mg2   0.69800   0.38840   0.54560   0.00380
Mg3   0.20000   0.21900   0.37440   0.00507
Mg4   0.70500   0.44340   0.95880   0.00380
Ca1   0.19700   0.41650   0.75140   0.03040
Ca2   0.20900   0.08410   0.14300   0.00760
Ca3   0.70200   0.37420   0.20090   0.01646
Ca4   0.70500   0.12810   0.69470   0.01773
O1   0.94300   0.34030   0.11700   0.00253
O2   0.67300   0.20150   0.08390   0.00253
O3   0.20400   0.47060   0.13420   0.00760
O4   0.21200   0.08740   0.53640   0.02533
O5   0.46000   0.33750   0.11340   0.02660
O6   0.72800   0.08700   0.53230   0.00253
O7   0.22700   0.24180   0.19400   0.02153
O8   0.44600   0.39320   0.66910   0.01140
O9   0.21400   0.19790   0.08380   0.01393
O10   0.95500   0.18070   0.61750   0.00380
O11   0.98300   0.39480   0.66800   0.01393
O12   0.20700   0.26460   0.69680   0.01267
O13   0.70800   0.47400   0.13340   0.02026
O14   0.21300   0.31570   0.59920   0.00760
O15   0.47700   0.17660   0.61700   0.01013
O16   0.70500   0.14780   0.98400   0.01393
O17   0.19700   0.37170   0.46660   0.01520
O18   0.20900   0.14130   0.98540   0.01140
O19   0.72000   0.36100   0.46730   0.00887
O20   0.42900   0.00920   0.45330   0.01520
O21   0.18800   0.13080   0.42900   0.01773
O22   0.73000   0.08900   0.85100   0.04686
O23   0.20500   0.42420   0.03060   0.01267
O24   0.69600   0.40950   0.03910   0.01646
O25   0.72700   0.34610   0.91500   0.01013
O26   0.43200   0.45020   0.55460   0.00887
O27   0.93000   0.21900   0.50600   0.03926
O28   0.71300   0.29590   0.59860   0.01520
O29   0.21300   0.37010   0.90670   0.02406
O30   0.69200   0.19940   0.29990   0.01267
O31   0.42400   0.04930   0.33580   0.01393
O32   0.97300   0.43740   0.83580   0.02280
O33   0.19900   0.07770   0.86820   0.05446
O34   0.45300   0.44130   0.83520   0.00633
O35   0.96000   0.16260   0.78290   0.00887
O36   0.98300   0.00760   0.45360   0.00760
O37   0.22500   0.30480   0.81240   0.01646
O38   0.50300   0.21640   0.50430   0.02786
O39   0.92300   0.26990   0.00410   0.00633
O40   0.47300   0.16640   0.78600   0.02660
O41   0.92900   0.29310   0.39200   0.01140
O42   0.44500   0.06820   0.05640   0.00380
O43   0.69700   0.49900   0.24450   0.03040
O44   0.72200   0.02920   0.75960   0.00633
O45   0.20000   0.18200   0.29800   0.11399
O46   0.72800   0.41450   0.35450   0.00887
O47   0.99200   0.04390   0.34030   0.01267
O48   0.98300   0.45140   0.55870   0.02786
O49   0.46600   0.27810   0.00760   0.00887
O50   0.71700   0.29810   0.81060   0.01267
O51   0.71400   1.00040   0.14880   0.01900
O52   0.47800   0.28160   0.38690   0.00507
O53   0.96600   0.05420   0.06070   0.01773
O54   0.92900   0.22690   0.89170   0.01520
O55   0.21500   0.42090   0.35900   0.01393
O56   0.72800   0.13690   0.43310   0.01267
O57   0.43300   0.50260   0.93840   0.01520
O58   0.95700   0.32120   0.27620   0.01900
O59   0.99600   0.49300   0.43940   0.02913
O60   0.47700   0.22400   0.88990   0.05699
O61   0.17100   0.02750   0.76350   0.01013
O62   0.46800   0.31650   0.27280   0.01773
O63   0.95700   0.10250   0.22430   0.01267
O64   0.47100   0.10580   0.22250   0.01773
O-H1   0.21300   0.04850   0.65470   0.01267
O-H2   0.23100   0.44380   0.22940   0.06459
O-H3   0.72700   0.26250   0.70110   0.01267
O-H4   0.68200   0.23410   0.19920   0.01267

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
11.79 Å	(48)
2.845 Å	(43)
2.616 Å	(100)
2.584 Å	(81)
2.501 Å	(39)
2.437 Å	(44)
2.406 Å	(61)
2.202 Å	(72)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations

Type Occurrence of TashelgiteHide

Type Locality:

ⓘ Tashelga River, Gornaya Shoria Region, Kemerovo Oblast, Russia

General Appearance of Type Material:

Long prismatic to acicular, slightly flattened crystals and their parallel intergrowths up to 0.2 x 0.3 x 2 mm in size.

Place of Conservation of Type Material:

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, no. 3983/1

Geological Setting of Type Material:

In calc-skarnoid zones.

Associated Minerals at Type Locality:

Vesuvianite	Scapolite	Perovskite	Magnetite	Hibonite
Hercynite	Grossular	Diopside	Diopside	Corundum
Calcite

Synonyms of TashelgiteHide

IMA2010-017

Lodochnikovite (of Nefedov)

Common AssociatesHide

Associated Minerals Based on Photo Data:

3 photos of Tashelgite associated with Vesuvianite Group

[X4₂][X3₈][X2₈][X1][Y1][Y2₄][Y3₈][T1₄][T2](Si₂O₇)₄(SiO₄)₁₀(O10)₂(O11)₈

Related Minerals - Strunz-mindat Grouping Hide

4.FG.05	Janggunite	Mn_5-x(Mn,Fe)_1+xO₈(OH)₆	Orth.
4.FG.10	Cesàrolite	Pb(Mn⁴⁺)₃O₆(OH)₂	Hex.
4.FG.15	Kimrobinsonite	(Ta,Nb)(OH)_5-2x(O,CO₃)_x ; x near 1.2	Iso.
4.FG.20	Langhofite	Pb₂(OH)[WO₄(OH)]	Tric. 1 : P1

Other InformationHide

Notes:

Tashelgite does not dissolve in hydrochloric and sulphuric acids.

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 TashelgiteHide

mindat.org URL:

https://www.mindat.org/min-40270.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for TashelgiteHide

Reference List:

Rastsvetaeva, R. K., Aksenov, S. M., Verin, I. A. (2010) Crystal structure of complex natural aluminum magnesium calcium iron oxide. Crystallography Reports, 55 (4) 563-568 doi:10.1134/s106377451004005x

Rastsvetaeva, R. K., Aksenov, S. M., Chukanov, N. V. (2010) Structure of the tashelgite mineral Ca2Mg2Fe 2 2+ Al18O32(OH)2 from Western Siberia: A new structure type. Doklady Chemistry, 434 (1) 233-236 doi:10.1134/s0012500810090065

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2010) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 4. Mineralogical Magazine, 74 (4) 797-800 doi:10.1180/s0026461x00038925

Ananyev, S. A., Konovalenko, S. I., Rastsvetaeva, R. K., Aksenov, S. M., Chukanov, N. V., Sapozhnikov, A. N., Zagorsky, V. E., Virus, A. A. (2011) Tashelgite, CaMgFe2 + Al9O16(OH), a new mineral species from calc-skarnoid in Gorny Shoria. Geology of Ore Deposits, 53 (8) 751-757 doi:10.1134/s1075701511080022

(2023) Tashelgite. Handbook of Mineralogy. Mineralogical Society of America

Localities for TashelgiteHide

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.

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)

Kemerovo Oblast

Gornaya Shoria Region

ⓘ Tashelga River (TL)

Williams et al. (2010) +1 other reference

Tashelgite

About TashelgiteHide

Unique IdentifiersHide

IMA Classification of TashelgiteHide

Classification of TashelgiteHide

Mineral SymbolsHide

Physical Properties of TashelgiteHide

Optical Data of TashelgiteHide

Chemistry of TashelgiteHide

Crystallography of TashelgiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of TashelgiteHide

Synonyms of TashelgiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for TashelgiteHide

References for TashelgiteHide

Localities for TashelgiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide