Pleysteinite, ((H2O)0.5K0.5)2Mn2Al3(PO4)4F2(H2O)10  ⋅  4H2O, the Al analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Abstract 2 O) 0.5 K0.5 ]2 Mn2 Al3 (PO4) 4 F2 (H2 O) 10  ⚫ 2 O, is the aluminium analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in specimens of altered zwieselite, in association with nordgauite, fluellite, rockbridgeite, pyrite and columbite. Pleysteinite occurs as isolated and small aggregates of colourless, stubby prisms that are typically 10 to 30 µ m wide and up to 100 µ m long. The crystals are flattened on { 010 } and bounded by { 111 }, { 100 } and { 001 } planes. The calculated density is 2.34 g cm- 3 + α = 1.566 (2), β = 1.580 (2), γ = 1.600 (2) (measured in white light) and 2V = ∘. The empirical formula from electron microprobe analyses and structure refinement is [(H2 O) 0.50 K0.50 ]2 (Mn1.20 Mg0.49 Fe0.27 2 + Zn0.05)∑ 2.01 1.63 Fe0.20 3 + Ti0.19 4 +)∑ 2.02 0.56 Ti0.44 4 +) (PO4) 4.02 [F0.58 O0.31 (OH) 0.11 ]2 (H2 O) 10  ⚫ 2 O. Pleysteinite has orthorhombic symmetry, with space group Pbca a = b = 20.5242 (17)  Å, c = 12.2651 (13)  Å, V = 2621.4 (4)  Å3 and Z = 4. The crystal structure was refined using single-crystal data to wR obs = 0.054 for 1692 reflections with I > 3 σ (I). The crystal structure contains corner-connected linear trimers of Al-centred octahedra that share corners with PO4 tetrahedra to form 10-member rings parallel to (010). K+ cations and water molecules are located in the rings. Additional corner-sharing of the PO4 tetrahedra with Mn (H2 O) 4 O2 octahedra occurs along [010] to complete the 3D framework structure.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Pleysteinite, ((H₂O)_0.5K_0.5)₂Mn₂Al₃(PO₄)₄F₂(H₂O)₁₀ ⋅ 4H₂O, the Al analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany ; volume:35 ; number:2 ; year:2023 ; pages:189-197 ; extent:9
European journal of mineralogy ; 35, Heft 2 (2023), 189-197 (gesamt 9)

Creator: Grey, Ian E.
Hochleitner, Rupert
Rewitzer, Christian
Kampf, Anthony R.
MacRae, Colin M.
Gable, Robert W.
Mumme, William G.
Keck, Erich
Davidson, Cameron

DOI: 10.5194/ejm-35-189-2023

URN: urn:nbn:de:101:1-2023033005182194836169

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 14.08.2025, 10:44 AM CEST

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Associated

Grey, Ian E.
Hochleitner, Rupert
Rewitzer, Christian
Kampf, Anthony R.
MacRae, Colin M.
Gable, Robert W.
Mumme, William G.
Keck, Erich
Davidson, Cameron

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Sub, sub, söt

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Sub, sub, söt

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Sub, sub, söt

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Other Objects (12)

Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub>&thinsp; ⋅ &thinsp;4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Dacostaite, K (Mg<sub>2</sub>Al)(Mg (H<sub>2</sub>O)<sub>6</sub>)<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>F<sub>6</sub>&thinsp; ⋅ &thinsp;2H<sub>2</sub>O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

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Sub, sub, söt

Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub>&thinsp; ⋅ &thinsp;4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Sub, sub, söt

Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub>&thinsp; ⋅ &thinsp;4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Dacostaite, K (Mg<sub>2</sub>Al)(Mg (H<sub>2</sub>O)<sub>6</sub>)<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>F<sub>6</sub>&thinsp; ⋅ &thinsp;2H<sub>2</sub>O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

Regerite, KFe<sub>6</sub>(PO<sub>4</sub>)<sub>4</sub>(OH)<sub>7</sub>(H<sub>2</sub>O)<sub>6</sub>&thinsp; ⋅ &thinsp;4H<sub>2</sub>O, the first new mineral species from the Kreuzberg pegmatite, Pleystein, Oberpfalz, Bavaria, Germany

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Sub, sub, söt

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Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Mckelveyite group minerals – Part 2: Alicewilsonite-(YCe), Na<sub>2</sub>Sr<sub>2</sub>YCe (CO<sub>3</sub>)<sub>6</sub> ⋅ 3H<sub>2</sub>O, a new species

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Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Dacostaite, K (Mg<sub>2</sub>Al)(Mg (H<sub>2</sub>O)<sub>6</sub>)<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>F<sub>6</sub> ⋅ 2H<sub>2</sub>O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

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Mckelveyite group minerals – Part 2: Alicewilsonite-(YCe), Na<sub>2</sub>Sr<sub>2</sub>YCe (CO<sub>3</sub>)<sub>6</sub> ⋅ 3H<sub>2</sub>O, a new species

Mckelveyite group minerals – Part 3: Bainbridgeite-(YCe), Na<sub>2</sub>Ba<sub>2</sub>YCe (CO<sub>3</sub>)<sub>6</sub> ⋅ 3H<sub>2</sub>O, a new species from Mont Saint-Hilaire, Canada

Hochleitnerite, (K (H<sub>2</sub>O)) Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>O<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Dacostaite, K (Mg<sub>2</sub>Al)(Mg (H<sub>2</sub>O)<sub>6</sub>)<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>F<sub>6</sub> ⋅ 2H<sub>2</sub>O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

Regerite, KFe<sub>6</sub>(PO<sub>4</sub>)<sub>4</sub>(OH)<sub>7</sub>(H<sub>2</sub>O)<sub>6</sub> ⋅ 4H<sub>2</sub>O, the first new mineral species from the Kreuzberg pegmatite, Pleystein, Oberpfalz, Bavaria, Germany

Mckelveyite group minerals – Part 2: Alicewilsonite-(YCe), Na<sub>2</sub>Sr<sub>2</sub>YCe (CO<sub>3</sub>)<sub>6</sub> ⋅ 3H<sub>2</sub>O, a new species

Mckelveyite group minerals – Part 3: Bainbridgeite-(YCe), Na<sub>2</sub>Ba<sub>2</sub>YCe (CO<sub>3</sub>)<sub>6</sub> ⋅ 3H<sub>2</sub>O, a new species from Mont Saint-Hilaire, Canada