Secondary minerals from weathering of pyrite-bearing shale on a north-facing bluff along the Missouri River. Location is approximate, based upon description in: Joekel, R.M., et al (2011).

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Alunite

8 valid minerals.

Rock Types Recorded

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

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Alphabetical List Tree Diagram

ⓘ Shale

Detailed Mineral List:

ⓘ Alunite

Formula: KAl₃(SO₄)₂(OH)₆

Reference: R.M. Joeckel, K.D. Wally, B.J. Ang Clement, P.R. Hanson, J.S. Dillon, S.K. Wilson (2011) Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA. CATENA, Volume 85:253-266

ⓘ Bayerite

Formula: Al(OH)₃

ⓘ Calcite

Formula: CaCO₃

ⓘ Felsőbányaite

Formula: Al₄(SO₄)(OH)₁₀ · 4H₂O

ⓘ Gibbsite

Formula: Al(OH)₃

ⓘ Gypsum

Formula: CaSO₄ · 2H₂O

ⓘ Gypsum var. Selenite

Formula: CaSO₄ · 2H₂O

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

ⓘ Vashegyite

Formula: Al₁₁(PO₄)₉(OH)₆ · 38H₂O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Bayerite	4.FE.10	Al(OH)₃
ⓘ	Gibbsite	4.FE.10	Al(OH)₃
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Alunite	7.BC.10	KAl₃(SO₄)₂(OH)₆
ⓘ	Felsőbányaite	7.DD.05	Al₄(SO₄)(OH)₁₀ · 4H₂O
ⓘ	Gypsum	7.CD.40	CaSO₄ · 2H₂O
ⓘ	var. Selenite	7.CD.40	CaSO₄ · 2H₂O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Vashegyite	8.DB.10	Al₁₁(PO₄)₉(OH)₆ · 38H₂O
Group 9 - Silicates
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
H	ⓘ Gibbsite	Al(OH)₃
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Felsőbányaite	Al₄(SO₄)(OH)₁₀ · 4H₂O
H	ⓘ Gypsum	CaSO₄ · 2H₂O
H	ⓘ Vashegyite	Al₁₁(PO₄)₉(OH)₆ · 38H₂O
H	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
H	ⓘ Bayerite	Al(OH)₃
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
O	ⓘ Gibbsite	Al(OH)₃
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Felsőbányaite	Al₄(SO₄)(OH)₁₀ · 4H₂O
O	ⓘ Gypsum	CaSO₄ · 2H₂O
O	ⓘ Vashegyite	Al₁₁(PO₄)₉(OH)₆ · 38H₂O
O	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
O	ⓘ Bayerite	Al(OH)₃
O	ⓘ Calcite	CaCO₃
Al	Aluminium
Al	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
Al	ⓘ Gibbsite	Al(OH)₃
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Felsőbányaite	Al₄(SO₄)(OH)₁₀ · 4H₂O
Al	ⓘ Vashegyite	Al₁₁(PO₄)₉(OH)₆ · 38H₂O
Al	ⓘ Bayerite	Al(OH)₃
Si	Silicon
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
P	Phosphorus
P	ⓘ Vashegyite	Al₁₁(PO₄)₉(OH)₆ · 38H₂O
S	Sulfur
S	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
S	ⓘ Felsőbányaite	Al₄(SO₄)(OH)₁₀ · 4H₂O
S	ⓘ Gypsum	CaSO₄ · 2H₂O
S	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
K	Potassium
K	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
Ca	Calcium
Ca	ⓘ Gypsum	CaSO₄ · 2H₂O
Ca	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
Ca	ⓘ Calcite	CaCO₃

References

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R.M. Joeckel, K.D. Wally, B.J. Ang Clement, P.R. Hanson, J.S. Dillon, S.K. Wilson (2011) Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA. CATENA, Volume 85:253-266

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