A 10 cm wide pegmatite dyke. Type locality for Hiortdahlite. It is located in the southern part of the Arøyskjærene. Brøgger (1890) unprecisely referred to this locality as a Gang an der Nordseite der Insel "Mittel-Arö".

Extinct locality.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

15 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Pegmatitic nepheline syenite'

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Andersen, T., Erambert, M., Larsen, A. O., Selbekk, R. S. (2010) Petrology of Nepheline Syenite Pegmatites in the Oslo Rift, Norway: Zirconium Silicate Mineral Assemblages as Indicators of Alkalinity and Volatile Fugacity in Mildly Agpaitic Magma. Journal of Petrology, 51 (11) 2303-2325 doi:10.1093/petrology/egq058

ⓘ 'Alkali Feldspar'

References:

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

References:

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

Brøgger, Waldemar Christofer (1890, January) Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Krystallographie und Mineralogie Vol. 16 (1) Walter de Gruyter GmbH

ⓘ Catapleiite

Formula: Na₂Zr(Si₃O₉) · 2H₂O

Description: Found as secondary veins in hiortdalite (Andersen et al. 2010)

References:

ⓘ 'Clinopyroxene Subgroup'

References:

ⓘ 'Feldspar Group'

References:

ⓘ Fluorite

Formula: CaF₂

References:

ⓘ Hiortdahlite

Formula: Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃

Habit: euhedral, plate-shaped crystals

Colour: Pale yellow

References:

Larsen, Alf Olav, Andersen, Frode, Dahlgren, Sven, Larsen, Knut Edvard, Burvald, Ingulv - Ed. (2010) The Langesundsfjord - History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf. p.1-240.

ⓘ Homilite

Formula: Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀

References:

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

ⓘ Molybdenite

Formula: MoS₂

References:

ⓘ Mosandrite-(Ce)

Formula: (Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂

References:

ⓘ Natrolite

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

References:

ⓘ Natrolite var. Spreustein

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

References:

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

References:

ⓘ 'Pyrochlore Group'

Formula: A₂Nb₂(O,OH)₆Z

References:

ⓘ Rosenbuschite

Formula: Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆

References:

ⓘ Sodalite

Formula: Na₄(Si₃Al₃)O₁₂Cl

References:

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

Btøgger, W. C. (1888) Vorläufige Mittheilung über den "Hiortdahlit", ein neues Mineral von Arö, Norwegen [Preliminary communication on the "Hiortdahlite", a new mineral from Arö, Norway]. Nyt magazin for naturvidenskaberne [New magazine for the natural sciences], 31 (3) 232-239

ⓘ Wöhlerite

Formula: Na₂Ca₄ZrNb(Si₂O₇)₂O₃F

Description: Found as primary inclusions in hiortdahlite (Andersen et al. 2010)

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Molybdenite	2.EA.30	MoS₂
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	'Pyrochlore Group'	4.00.	A₂Nb₂(O,OH)₆Z
Group 9 - Silicates
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Homilite	9.AJ.20	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
ⓘ	Wöhlerite	9.BE.17	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
ⓘ	Hiortdahlite	9.BE.17	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
ⓘ	Mosandrite-(Ce)	9.BE.20	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
ⓘ	Rosenbuschite	9.BE.22	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
ⓘ	Catapleiite	9.CA.15	Na₂Zr(Si₃O₉) · 2H₂O
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Sodalite	9.FB.10	Na₄(Si₃Al₃)O₁₂Cl
ⓘ	Natrolite	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
ⓘ	var. Spreustein	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
Unclassified
ⓘ	'Alkali Feldspar'	-
ⓘ	'Feldspar Group'	-
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Clinopyroxene Subgroup'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
H	ⓘ Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
H	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
H	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
H	ⓘ Natrolite var. Spreustein	Na₂Al₂Si₃O₁₀ · 2H₂O
B	Boron
B	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
O	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
O	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
O	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
O	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
O	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Natrolite var. Spreustein	Na₂Al₂Si₃O₁₀ · 2H₂O
F	Fluorine
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluorite	CaF₂
F	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
F	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
F	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
Na	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Na	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
Na	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Na	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Na	ⓘ Natrolite var. Spreustein	Na₂Al₂Si₃O₁₀ · 2H₂O
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Al	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Al	ⓘ Natrolite var. Spreustein	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
Si	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
Si	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
Si	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Natrolite var. Spreustein	Na₂Al₂Si₃O₁₀ · 2H₂O
S	Sulfur
S	ⓘ Molybdenite	MoS₂
Cl	Chlorine
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Cl	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
Ca	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
Ca	ⓘ Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
Ca	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Ti	Titanium
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
Ti	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Homilite	Ca₂(Fe²⁺,Mg)B₂Si₂O₁₀
Zr	Zirconium
Zr	ⓘ Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
Zr	ⓘ Hiortdahlite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃
Zr	ⓘ Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆
Zr	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Zr	ⓘ Zircon	Zr(SiO₄)
Nb	Niobium
Nb	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
Nb	ⓘ Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
Mo	Molybdenum
Mo	ⓘ Molybdenite	MoS₂

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

EuropeContinent

Norway

LangesundsfjordenFjord
Oslo Volcanic ProvinceVolcanic Province
⭔Vestfold og Telemark (2020-2023)County

ScandinaviaRegion

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