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Tania and Jaco Janse van Nieuwenhuizen
Crystal System:
Member of:
Named after Jaco and Tania Janse van Nieuwenhuizen who found the specimen.
Isostructural with:
This page provides mineralogical data about Taniajacoite.

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Classification of TaniajacoiteHide

Approval Year:

Physical Properties of TaniajacoiteHide


Chemical Properties of TaniajacoiteHide

IMA Formula:
SrCaMn3+2Si4O11(OH)4 · 2H2O

Crystallography of TaniajacoiteHide

Crystal System:
Cell Parameters:
a = 9.1365(6) Å, b = 6.2567(4) Å, c = 12.0045(7) Å
α = 90.019(4)°, β = 91.64(4)°, γ = 89.899(4)°
a:b:c = 1.46 : 1 : 1.919
Unit Cell V:
685.95 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:

Type Occurrence of TaniajacoiteHide

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:

Synonyms of TaniajacoiteHide

Relationship of Taniajacoite to other SpeciesHide

Member of:
Other Members of this group:
RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2·2H2OMon. 2
StrontioruiziteSr2Mn3+2Si4O11(OH)4 · 2H2OMon. 2 : B2

Other InformationHide

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

References for TaniajacoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yang, H., Gu, X., Downs, R.T. and Xie, X. (2015) Taniajacoite, IMA 2014-107. CNMNC Newsletter No. 25, June 2015, page 531; Mineralogical Magazine, 79, 529-535.

Internet Links for TaniajacoiteHide

Localities for TaniajacoiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
South Africa (TL)
  • Northern Cape
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
Yang, H., Gu, X., Downs, R.T. and Xie, X. (2015) Taniajacoite, IMA 2014-107. CNMNC Newsletter No. 25, June 2015, page 531; Mineralogical Magazine, 79, 529-535.
Mineral and/or Locality  
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