Dutrowite, Na (Fe2+2.5Ti0.5) Al6(Si6O18)(BO3)3(OH)3O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent

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Abstract 2.5 2 + Ti0.5) Al6 (Si6 O18)(BO3) 3 (OH) 3 O, has been discovered in an outcrop of a Permian metarhyolite near the hamlet of Fornovolasco, Apuan Alps, Tuscany, Italy. It occurs as chemically homogeneous domains, up to 0.5 mm, brown in colour, with a light-brown streak and a vitreous lustre, within anhedral to subhedral prismatic crystals, up to 1 mm in size, closely associated with Fe-rich oxy-dravite. Dutrowite is trigonal, space group R m a = 15.9864 (8), c = 7.2187 (4)  Å, V = 1597.68 (18)  Å3, and Z = 3. The crystal structure was refined to R 1 = 0.0257 for 1095 unique reflections with F o > 4 σ (F o X (Na0.81 Ca0.20 K0.01)Σ 1.02 Y (Fe1.25 2 + Mg0.76 Ti0.56 Al0.42)Σ 3.00 Z (Al4.71 Fe0.27 3 + V0.02 3 + Mg0.82 Fe0.18 2 +)Σ 6.00 T [(Si5.82 Al0.18)Σ 6.00 18 ] (BO3) 3 O (3) (OH) 3 O (1) [O0.59 (OH) 0.41 ]Σ 1.00 X (Na0.81 Ca0.20 K0.01)Σ 1.02 Y (Fe1.43 2 + Mg1.00 Ti0.56)Σ 3.00 Z (Al5.13 Fe0.27 3 + V0.02 3 + Mg0.58)Σ 6.00 T [(Si5.82 Al0.18)Σ 6.00 18 ] (BO3) 3 V 3 W [O0.59 (OH) 0.41 ]Σ 1.00 3 + = 4 + + 2 +. Its occurrence seems to be related to late-stage high-T/low-P replacement of “biotite” during the late-magmatic/hydrothermal evolution of the Permian metarhyolite.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Dutrowite, Na (Fe²⁺_2.5Ti_0.5) Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent ; volume:35 ; number:1 ; year:2023 ; pages:81-94 ; extent:14
European journal of mineralogy ; 35, Heft 1 (2023), 81-94 (gesamt 14)

Creator: Biagioni, Cristian
Bosi, Ferdinando
Mauro, Daniela
Skogby, Henrik
Dini, Andrea
Zaccarini, Federica

DOI: 10.5194/ejm-35-81-2023

URN: urn:nbn:de:101:1-2023033007115940409691

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

Last update: 14.08.2025, 10:46 AM CEST

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Associated

Biagioni, Cristian
Bosi, Ferdinando
Mauro, Daniela
Skogby, Henrik
Dini, Andrea
Zaccarini, Federica

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Rotherkopfite, KNa2(Fe2+2.5Ti4+1.5) Fe2+(Si4O12)2, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany

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Manganrockbridgeite, Mn2+2Fe3+3(PO4)3(OH)4(H2O), a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

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Kenoargentotetrahedrite-(Zn), (Ag6)4+(Cu4Zn2) Sb4S12□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China

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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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Surfactant-Encapsulated Clusters (SECs): (DODA)20(NH4)[H3Mo57V6(NO)6O183(H2O)18], a Case Study

Hochleitnerite, (K (H2O)) Mn2(Ti2Fe)(PO4)4O2(H2O)10  ⋅  4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Hochleitnerite, (K (H2O)) Mn2(Ti2Fe)(PO4)4O2(H2O)10  ⋅  4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Measurement report: Radiative efficiencies of (CF3)2CFCN, CF3OCFCF2, and CF3OCF2CF3

Measurement report: Radiative efficiencies of (CF3)2CFCN, CF3OCFCF2, and CF3OCF2CF3

Fluor-rewitzerite, ((H2O) K) Mn2(Al2Ti)(PO4)4(OF)(H2O)10 ⋅ 4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Batoniite, (Al8(OH)14(H2O)18)(SO4)5  ⋅  5H2O, a new mineral with the (Al8(OH)14(H2O)18)10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy

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Dacostaite, K (Mg2Al)(Mg (H2O)6)2(AsO4)2F6  ⋅  2H2O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

Measurement report: Radiative efficiencies of (CF3)2CFCN, CF3OCFCF2, and CF3OCF2CF3

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Batoniite, (Al8(OH)14(H2O)18)(SO4)5  ⋅  5H2O, a new mineral with the (Al8(OH)14(H2O)18)10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy

Rotherkopfite, KNa2(Fe2+2.5Ti4+1.5) Fe2+(Si4O12)2, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany

Manganrockbridgeite, Mn2+2Fe3+3(PO4)3(OH)4(H2O), a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Ferro-ferri-holmquistite, <italic>□</italic>Li2(Fe2+3Fe3+2) Si8O22(OH)2, Fe2+Fe3+ analogue of holmquistite, from the Iwagi islet, Ehime, Japan

Kenoargentotetrahedrite-(Zn), (Ag6)4+(Cu4Zn2) Sb4S12□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China

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

Surfactant-Encapsulated Clusters (SECs): (DODA)20(NH4)[H3Mo57V6(NO)6O183(H2O)18], a Case Study

Hochleitnerite, (K (H2O)) Mn2(Ti2Fe)(PO4)4O2(H2O)10  ⋅  4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

Dacostaite, K (Mg2Al)(Mg (H2O)6)2(AsO4)2F6  ⋅  2H2O, a new fluoride–arsenate mineral from the Cetine di Cotorniano Mine (Tuscany, Italy)

Measurement report: Radiative efficiencies of (CF3)2CFCN, CF3OCFCF2, and CF3OCF2CF3

Fluor-rewitzerite, ((H2O) K) Mn2(Al2Ti)(PO4)4(OF)(H2O)10 ⋅ 4H2O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany

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Other Objects (12)

Zinkgruvanite, Ba<sub>4</sub>Mn<sup>2+</sup><sub>4</sub>Fe<sup>3+</sup><sub>2</sub>(Si<sub>2</sub>O<sub>7</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>O<sub>2</sub>(OH)<sub>2</sub>, a new ericssonite-group mineral from the Zinkgruvan Zn-Pb-Ag-Cu deposit, Askersund, Örebro County, Sweden

Rotherkopfite, KNa<sub>2</sub>(Fe<sup>2+</sup><sub>2.5</sub>Ti<sup>4+</sup><sub>1.5</sub>) Fe<sup>2+</sup>(Si<sub>4</sub>O<sub>12</sub>)<sub>2</sub>, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany

Manganrockbridgeite, Mn<sup>2+</sup><sub>2</sub>Fe<sup>3+</sup><sub>3</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>4</sub>(H<sub>2</sub>O), a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Ferro-ferri-holmquistite, <italic>□</italic>Li<sub>2</sub>(Fe<sup>2+</sup><sub>3</sub>Fe<sup>3+</sup><sub>2</sub>) Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>, Fe<sup>2+</sup>Fe<sup>3+</sup> analogue of holmquistite, from the Iwagi islet, Ehime, Japan

Kenoargentotetrahedrite-(Zn), (Ag<sub>6</sub>)<sup>4+</sup>(Cu<sub>4</sub>Zn<sub>2</sub>) Sb<sub>4</sub>S<sub>12</sub>□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China

Surfactant-Encapsulated Clusters (SECs): (DODA)<sub>20</sub>(NH<sub>4</sub>)[H<sub>3</sub>Mo<sub>57</sub>V<sub>6</sub>(NO)<sub>6</sub>O<sub>183</sub>(H<sub>2</sub>O)<sub>18</sub>], a Case Study

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)

Measurement report: Radiative efficiencies of (CF<sub>3</sub>)<sub>2</sub>CFCN, CF<sub>3</sub>OCFCF<sub>2</sub>, and CF<sub>3</sub>OCF<sub>2</sub>CF<sub>3</sub>

Fluor-rewitzerite, ((H<sub>2</sub>O) K) Mn<sub>2</sub>(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>(OF)(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

Zinkgruvanite, Ba<sub>4</sub>Mn<sup>2+</sup><sub>4</sub>Fe<sup>3+</sup><sub>2</sub>(Si<sub>2</sub>O<sub>7</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>O<sub>2</sub>(OH)<sub>2</sub>, a new ericssonite-group mineral from the Zinkgruvan Zn-Pb-Ag-Cu deposit, Askersund, Örebro County, Sweden

Rotherkopfite, KNa<sub>2</sub>(Fe<sup>2+</sup><sub>2.5</sub>Ti<sup>4+</sup><sub>1.5</sub>) Fe<sup>2+</sup>(Si<sub>4</sub>O<sub>12</sub>)<sub>2</sub>, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany

Manganrockbridgeite, Mn<sup>2+</sup><sub>2</sub>Fe<sup>3+</sup><sub>3</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>4</sub>(H<sub>2</sub>O), a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Ferro-ferri-holmquistite, <italic>□</italic>Li<sub>2</sub>(Fe<sup>2+</sup><sub>3</sub>Fe<sup>3+</sup><sub>2</sub>) Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>, Fe<sup>2+</sup>Fe<sup>3+</sup> analogue of holmquistite, from the Iwagi islet, Ehime, Japan

Kenoargentotetrahedrite-(Zn), (Ag<sub>6</sub>)<sup>4+</sup>(Cu<sub>4</sub>Zn<sub>2</sub>) Sb<sub>4</sub>S<sub>12</sub>□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China

Surfactant-Encapsulated Clusters (SECs): (DODA)<sub>20</sub>(NH<sub>4</sub>)[H<sub>3</sub>Mo<sub>57</sub>V<sub>6</sub>(NO)<sub>6</sub>O<sub>183</sub>(H<sub>2</sub>O)<sub>18</sub>], a Case Study

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)

Measurement report: Radiative efficiencies of (CF<sub>3</sub>)<sub>2</sub>CFCN, CF<sub>3</sub>OCFCF<sub>2</sub>, and CF<sub>3</sub>OCF<sub>2</sub>CF<sub>3</sub>

Fluor-rewitzerite, ((H<sub>2</sub>O) K) Mn<sub>2</sub>(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>(OF)(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

Zinkgruvanite, Ba<sub>4</sub>Mn<sup>2+</sup><sub>4</sub>Fe<sup>3+</sup><sub>2</sub>(Si<sub>2</sub>O<sub>7</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>O<sub>2</sub>(OH)<sub>2</sub>, a new ericssonite-group mineral from the Zinkgruvan Zn-Pb-Ag-Cu deposit, Askersund, Örebro County, Sweden

Rotherkopfite, KNa<sub>2</sub>(Fe<sup>2+</sup><sub>2.5</sub>Ti<sup>4+</sup><sub>1.5</sub>) Fe<sup>2+</sup>(Si<sub>4</sub>O<sub>12</sub>)<sub>2</sub>, a new neptunite-group mineral without essential lithium, from Rother Kopf, Eifel volcanic fields, Germany

Manganrockbridgeite, Mn<sup>2+</sup><sub>2</sub>Fe<sup>3+</sup><sub>3</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>4</sub>(H<sub>2</sub>O), a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Ferro-ferri-holmquistite, <italic>□</italic>Li<sub>2</sub>(Fe<sup>2+</sup><sub>3</sub>Fe<sup>3+</sup><sub>2</sub>) Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>, Fe<sup>2+</sup>Fe<sup>3+</sup> analogue of holmquistite, from the Iwagi islet, Ehime, Japan

Kenoargentotetrahedrite-(Zn), (Ag<sub>6</sub>)<sup>4+</sup>(Cu<sub>4</sub>Zn<sub>2</sub>) Sb<sub>4</sub>S<sub>12</sub>□, a new member of the tetrahedrite group from the Yindongpo Au deposit, China

Surfactant-Encapsulated Clusters (SECs): (DODA)<sub>20</sub>(NH<sub>4</sub>)[H<sub>3</sub>Mo<sub>57</sub>V<sub>6</sub>(NO)<sub>6</sub>O<sub>183</sub>(H<sub>2</sub>O)<sub>18</sub>], a Case Study

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)

Measurement report: Radiative efficiencies of (CF<sub>3</sub>)<sub>2</sub>CFCN, CF<sub>3</sub>OCFCF<sub>2</sub>, and CF<sub>3</sub>OCF<sub>2</sub>CF<sub>3</sub>

Fluor-rewitzerite, ((H<sub>2</sub>O) K) Mn<sub>2</sub>(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>(OF)(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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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)

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)

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)