Taniajacoite (original) (raw)

A valid IMA mineral species

About TaniajacoiteHide

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Formula:

SrCaMn3+2Si4O11(OH)4 · 2H2O

Name:

Named after Jaco and Tania Janse van Nieuwenhuizen who found the specimen.

This page provides mineralogical data about Taniajacoite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:46550:4

2a28d531-a255-4362-b2ab-86608ef5a946

IMA Classification of TaniajacoiteHide

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IMA Formula:

SrCaMn3+2Si4O11(OH)4 · 2H2O

Type description reference:

Yang, Hexiong, Gu, Xiangping, Cairncross, Bruce, Downs, Robert T., Evans, Stanley H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist, 59 (2) 431-444 doi:10.3749/canmin.2000037

Classification of TaniajacoiteHide

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9.BJ.35

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination

Mineral SymbolsHide

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

Physical Properties of TaniajacoiteHide

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Cleavage:

Distinct/Good
Good on {010}

Density:

3.05(2) g/cm3 (Measured) 3.09 g/cm3 (Calculated)

Optical Data of TaniajacoiteHide

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RI values:

_n_α = 1.686(2) _n_β = 1.729(2) _n_γ = 1.746(2)

2V:

Measured: 63.7° (5), Calculated: 62.5°

δ = 0.060

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

Chemistry of TaniajacoiteHide

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Mindat Formula:

SrCaMn3+2Si4O11(OH)4 · 2H2O

Crystallography of TaniajacoiteHide

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Cell Parameters:

a = 9.1386(5) Å, b = 6.2566(3) Å, c = 12.0043(6) Å
α = 90.019(4)°, β = 91.643(4)°, γ = 89.900(4)°

Ratio:

a:b:c = 1.461 : 1 : 1.919

Twinning:

No macroscopic twinning.

Comment:

Non-standard space-group setting C1, to allow easier comparison with other, monoclinic (C2) members of the ruizite group. Pseudomonoclinic.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of TaniajacoiteHide

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General Appearance of Type Material:

Radiating acicular brown crystals.

Place of Conservation of Type Material:

Co-type material is deposited in the collections of the Mineral Museum of the University of Arizona, Tucson, AZ, USA, catalogue number 20009, and the RRUFF Project, deposition number R140945

Associated Minerals at Type Locality:

Reference:

Yang, H., Gu, X., Cairncross, B., Downs, R.T. and Evans, S.H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist: 59: 431-444.

Synonyms of TaniajacoiteHide

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Relationship of Taniajacoite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 TaniajacoiteHide

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References for TaniajacoiteHide

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Reference List:

Yang, Hexiong, Gu, Xiangping, Cairncross, Bruce, Downs, Robert T., Evans, Stanley H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist, 59 (2) 431-444 doi:10.3749/canmin.2000037

Localities for TaniajacoiteHide

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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

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- 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.