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Holmquistite from
Utö Mines, Utö, Haninge, Stockholm County, Sweden


00225580017272737217549.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
00182180017700030702783.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
09816560017271923815488.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
09793090017473375526680.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
00225580017272737217549.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
00694080017699556916970.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
03797040017367569318224.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
03073660017467267069777.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
00225580017272737217549.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
09363660017700030702237.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
09816560017271923815488.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
07211640017473375538246.jpg
Holmquistite

Utö Mines, Utö, Haninge, Stockholm County, Sweden
Locality type:Mine
Classification
Species:Holmquistite
Formula:◻Li2(Mg3Al2)(Si8O22)(OH)2
Chemical Analyses:
Oxide wt%:
12
SiO258.84 %60.45 %
TiO20.02 %0.00 %
Al2O38.21 %7.70 %
Cr2O30.02 %0.00 %
MgO12.16 %12.12 %
CaO0.02 %0.00 %
MnO0.04 %0.00 %
Fe2O35.83 %9.68 %
FeO6.06 %4.38 %
ZnO0.14 %0.00 %
Na2O0.37 %1.12 %
K2O0.02 %0.54 %
F0.40 %0.43 %
Cl0.01 %0.00 %
Li2O3.58 %2.13 %
H2O2.10 %2.28 %
O=F/Cl-0.13 %0.00 %
Total:97.69 %100.83 %
Empirical formulas:
1Na0.02(Li1.92Na0.08) 2(Mg2.32Fe2+0.62Mn2+0.06Zn2+0.01Li0.01Al1.30Fe3+0,68) 5.00Si8O22((OH1.87F0.13) 2
2K0.09 (Li1.14Na0.29Fe0. 07) 1.50 (Mg2.40Al1.20 Fe3+0.97 Fe2+0.42) 5 Si8.04O22 ((OH) 1.84F0.16) 2
Sample references:
1 -
Camara, F.; Oberti, R. (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in BLi amphiboles. American Mineralogist, 90 (7). 1167-1176 doi:10.2138/am.2005.1793
2Type Specimen
Osann, A. (1913) Über Holmquistit, einen Lithionglaukophan von der Insel Utö. Sitzungsberichte der Heidelberger Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse: Abteilung A, Mathematisch-physikalische Wissenschaften, Jahrgang 1913 23 doi:10.11588/diglit.37382#0001
Comments:Holmquistite occurs predominantly in mica schists that forms in the contact zone around the pegmatites. Holmquistite forms up to 2 cm long fibers, giving the mica schist a bluish shimmer.
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Magnetite2
Data
Mineral Data:Click here to view Holmquistite data
Locality Data:Click here to view Utö Mines, Utö, Haninge, Stockholm County, Sweden
Photo GalleryView Gallery (15 photos)
Data Identifiers
Mindat Occurrence Record ID:53201
Long-form Identifier:1:3:53201:3
GUID (UUID V4):0
Localities for Holmquistite in this Region
Nyköpingsgruvan, Utö Mines, Utö, Haninge, Stockholm County, Sweden
Nearest other occurrences of Holmquistite
0.0km (0.0 miles) ⓘNyköpingsgruvan, Utö Mines, Utö, Haninge, Stockholm County, Sweden
References
Osann, A. (1913) Über Holmquistit, einen Lithionglaukophan von der Insel Utö. Sitzungsberichte der Heidelberger Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse: Abteilung A, Mathematisch-physikalische Wissenschaften, Jahrgang 1913 23 doi:10.11588/diglit.37382#0001
Vogt, T., Bastiansen, O., Skancke, P. (1958) Notes and news: Holmquistite as a rhombic amphibole. American Mineralogist, 43 (9-10) 981-982
Otter, Bertil (1990) Holmquistit - ett inte så ovanligt mineral [Holmquistite - a not-so-uncommon mineral]. Stuffen Medlemsblad för Södertörns Amatørgeologiska Sällskap [The specimen. Member magazine for Södertörns amateurgeological society], 11 (40). 10-13
Langhof, Jörgen, Jonsson, Erik, Gustafsson, Lars, Otter, Bertil (1998) Utö- en klassisk svensk mineralfyndort [Utö - a classical Swedish mineral locality]. Norsk Bergverksmuseum Skrift, 14. 29-31
 
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