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Høgtuvaite

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Mount Høgtuva, Norway
Formula:
Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]
Empirical formula, including observed minor Na and Ti contents,(Ca,Na)2(Fe2+,Fe3+,Ti)6[O2|Be(Si,Al)5O18].
Colour:
Black
Lustre:
Vitreous
Hardness:
Crystal System:
Triclinic
Name:
Named for the Høgtuva peak, the nearest significant reference point in the area of the type locality in Nordland, Norway. The peak is located about 7 km NW of the TL. It was first found in 1983 by Ingvar Lindahl (Norwegian Geological Survey) during uranium exploration in the area, and named by Grauch et al. (1994).
This page provides mineralogical data about Høgtuvaite.


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Classification of HøgtuvaiteHide

Approved
Approval Year:
1990
First Published:
1994
Approval History:
Name published in the local newspaper, Rana Blad 4. August 1986, and also sold by dealers under this name prior to submission to CNMMN-IMA.
Approved in 1990.
9.DH.40

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.1a.3

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2

Physical Properties of HøgtuvaiteHide

Vitreous
Colour:
Black
Streak:
Grey-green
Hardness:
5½ on Mohs scale
Cleavage:
Distinct/Good
in two directions

Optical Data of HøgtuvaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.780 nγ = 1.820
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v distinct

Chemical Properties of HøgtuvaiteHide

Formula:
Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]

Empirical formula, including observed minor Na and Ti contents,(Ca,Na)2(Fe2+,Fe3+,Ti)6[O2|Be(Si,Al)5O18].
IMA Formula:
Ca4(Fe2+6Fe3+6)O4[Si8Be2Al2O36]

Crystallography of HøgtuvaiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.317(1) Å, b = 10.724(1) Å, c = 8.855(1) Å
α = 105.77(1)°, β = 96.21(1)°, γ = 124.77(1)°
Ratio:
a:b:c = 0.962 : 1 : 0.826
Unit Cell V:
730.32 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Ubiquitous polysynthetic twinning; twin axis perpendicular pseudomonoclinic (010).

Type Occurrence of HøgtuvaiteHide

General Appearance of Type Material:
Black, elongate, poikiloblastic crystals up to 4 cm long.
Place of Conservation of Type Material:
In the Mineralogical-Geological Museum, University of Oslo, Oslo, Norway and in the Smithsonian Institution, Washington, D.C., USA.
Geological Setting of Type Material:
In a Proterozoic peraluminous granitic gneiss
Associated Minerals at Type Locality:

Synonyms of HøgtuvaiteHide

Other Language Names for HøgtuvaiteHide

Relationship of Høgtuvaite to other SpeciesHide

Other Members of this group:
DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
LeucorhöniteCa2(Mg,Fe3+,Al)6(Si,Al)6O20Tric.
Makarochkinite(Ca,Na)2Fe2+4Fe3+Ti[O2|BeAlSi4O18]Tric. 1 : P1
RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Phenakite1 photo of Høgtuvaite associated with Phenakite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon.
9.DH.15HaradaiteSrVSi2O7Orth.
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth.
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth.
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon.
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon.
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon.
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
9.DH.40DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
9.DH.40KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric.
9.DH.40Makarochkinite(Ca,Na)2Fe2+4Fe3+Ti[O2|BeAlSi4O18]Tric. 1 : P1
9.DH.40RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16Mon.
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
9.DH.70JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
9.DH.75AgrelliteNaCa2Si4O10FTric.

Related Minerals - Dana Grouping (8th Ed.)Hide

69.2.1a.1AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
69.2.1a.2DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
69.2.1a.4KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric.
69.2.1a.5RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
69.2.1a.6SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
69.2.1a.7WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
69.2.1a.8WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1

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 HøgtuvaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yakubovich, O.V. et al. (1990) Kristallografiya 35: 1388-1394 (in Russian). [structure of "makarochkinite" = høgtuvaite]
Grauch et al. (1994) Høgtuvaite, a new beryllian member of the aenigmatite group fom Norway, with x-ray data on aenigmatite. Canadian Mineralogist: 32: 439-448.
Burt, D. M. (1994) Vector representation of some mineral compositions in the aenigmatite group, with special reference to høgtuvaite. Canadian Mineralogist 32, 449-457.
New Minerals (1997), New Minerals 1990-1994.
Raade, G. (1996) Minerals originally described from Norway. Including notes on type material. Norsk Bergverksmuseum Skrift: 11: 104 pp. + plates 1-7.

Internet Links for HøgtuvaiteHide

Localities for HøgtuvaiteHide

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.
Norway (TL)
 
  • Nordland
    • Rana
Grauch et al. (1994): Høgtuvaite, a new beryllian member of the aenigmatite group fom Norway, with x-ray data on aenigmatite. Canadian Mineralogist. 32: 439-448; Schilling, J., Bingen, B., Skår, O., Wenzel, T., Markl, G. (2015): Formation and evolution of the Høgtuva beryllium deposit, Norway. Contributions to Mineralogy and Petrology 170, 30. (21 pp.)
Mineral and/or Locality  
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