Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Astrophyllite from
Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway


03540060017272731451011.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
02266760017272033308866.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
00168480017272033314984.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
06497170017272033317105.jpg
Astrophyllite, etc.

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
00005910017367892836456.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
04886450017367892854499.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
04847980017367892868358.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
06854550017367892871424.jpg
Astrophyllite, etc.

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
03540060017272731451011.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
02266760017272033308866.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
00168480017272033314984.jpg
Astrophyllite

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
06497170017272033317105.jpg
Astrophyllite, etc.

Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
Locality type:Prospect
Classification
Species:Astrophyllite
Formula:K2NaFe72+Ti2[Si4O12]2O2(OH)4F
Chemical Analyses:
Oxide wt%:
1
Na2O2.68 %
K2O5.21 %
Rb2O1.05 %
Cs2O1.35 %
CaO1.00 %
SrO0.10 %
MgO1.11 %
MnO13.99 %
FeO18.45 %
ZnO0.49 %
Al2O31.01 %
Ce2O30.31 %
TiO29.20 %
SnO30.23 %
ZrO21.69 %
Nb2O52.81 %
SiO233.98 %
F1.38 %
H2O2.65 %
O=F-0.58 %
Total:98.11 %
Sample references:
1NOR 1 (RW-1)
Piilonen, P. C., McDonald, A. M., Lalonde, A. E. (2003) Insights into astrophyllite-group minerals. II. Crystal chemistry. The Canadian Mineralogist, 41 (1). 27-54 doi:10.2113/gscanmin.41.1.27
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Aegirine2
Albite1
Zircon1
Data
Mineral Data:Click here to view Astrophyllite data
Locality Data:Click here to view Eudidymite-Epididymite locality, Vesle Arøya, Larvik Commune, Vestfold, Norway
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:465779
Long-form Identifier:1:3:465779:8
GUID (UUID V4):0
Nearest other occurrences of Astrophyllite
0.1km (0.0 miles) ⓘNatrolittodden, Vesle Arøya, Larvik Commune, Vestfold, Norway
0.1km (0.1 miles) ⓘEikaholmen, Larvik Commune, Vestfold, Norway
0.6km (0.4 miles) ⓘArøyskjærene North, Arøyskjærene (Arøy skerries), Larvik Commune, Vestfold, Norway
1.4km (0.9 miles) ⓘTangane, Siktesøya, Porsgrunn, Telemark, Norway
3.2km (2.0 miles) ⓘBarkevikstranda, Barkevika, Barkevik area, Larvik Commune, Vestfold, Norway
3.2km (2.0 miles) ⓘBiong, Barkevik area, Larvik Commune, Vestfold, Norway
3.4km (2.1 miles) ⓘBarkevika, Barkevik area, Larvik Commune, Vestfold, Norway
3.7km (2.3 miles) ⓘHeia Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
4.2km (2.6 miles) ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
4.3km (2.7 miles) ⓘSaga 1 Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
References
Flink, G (1899) Über einige seltene Mineralien aus der Gegend von Langesund in Norwegen [About some rare minerals from the Langesund area in Norway]. Bulletin of the Geological Institution of the University of Upsala, 4. 16-27
Engvoldsen, Tom, Andersen, Frode, Berge, Svein A., Burvald, Ingulv (1991) Pegmatittmineraler fra Larvik ringkompleks [Pegmatite minerals from the Larvik ring complex], in Mineraler fra Larvikittområdet. STEIN. Nordisk magasin for populær geologi, 18 (1) 15-71
Piilonen, P. C., McDonald, A. M., Lalonde, A. E. (2003) Insights into astrophyllite-group minerals. II. Crystal chemistry. The Canadian Mineralogist, 41 (1). 27-54 doi:10.2113/gscanmin.41.1.27
 
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