Ian E. Grey
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View article: The <i>M</i> <sub>2</sub> (PO <sub>4</sub> ) <sub>2</sub> Φ <sub>8</sub> cyclic tetramer – a flexible structure-building unit – Part 1: Primary pegmatite phosphate minerals
The <i>M</i> <sub>2</sub> (PO <sub>4</sub> ) <sub>2</sub> Φ <sub>8</sub> cyclic tetramer – a flexible structure-building unit – Part 1: Primary pegmatite phosphate minerals Open
The minerals of the triphylite, alluaudite, zwieselite, and graftonite groups are amongst the most abundant of the primary phosphate minerals in granitic pegmatites. An analysis of the crystal structures of the four groups from the perspec…
View article: Laueite/stewartite epitaxy – a single-crystal diffraction study
Laueite/stewartite epitaxy – a single-crystal diffraction study Open
Laueite/stewartite epitaxy was studied using single-crystal diffraction applied to a composite crystal from Hagendorf-Süd, Bavaria. The orientation relationships between the crystals of the two minerals was facilitated by using a non-conve…
View article: Fluormacraeite, [(H<sub>2</sub>O)K]Mn<sub>2</sub>(Fe<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, the first type mineral from the Plößberg pegmatite, Upper Palatinate, Bavaria, Germany
Fluormacraeite, [(H<sub>2</sub>O)K]Mn<sub>2</sub>(Fe<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, the first type mineral from the Plößberg pegmatite, Upper Palatinate, Bavaria, Germany Open
Fluormacraeite, [(H2O)K]Mn2(Fe2Ti)(PO4)4[OF](H2O)10 ⋅ 4H2O, is a new monoclinic member of the paulkerrite group from the Plößberg pegmatite, Upper Palatinate, Bavaria, Germany. It was found in specimens of magnesium-bearing triplite. Assoc…
View article: 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
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 Open
Fluor-rewitzerite, [(H2O)K]Mn2(Al2Ti)(PO4)4(OF)(H2O)10⋅4H2O, is a new monoclinic member of the paulkerrite group, from the Hagendorf-Süd pegmatite, Oberpfalz (Upper Palatinate in English), Bavaria, Germany. It occurs on the walls of vugs i…
View article: Sperlingite, (H<sub>2</sub>O)K(Mn<sup>2+</sup>Fe<sup>3+</sup>)(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)][(H<sub>2</sub>O)<sub>9</sub>(OH)]⋅4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany
Sperlingite, (H<sub>2</sub>O)K(Mn<sup>2+</sup>Fe<sup>3+</sup>)(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)][(H<sub>2</sub>O)<sub>9</sub>(OH)]⋅4H<sub>2</sub>O, a new paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany Open
Sperlingite, (H 2 O)K(Mn 2+ Fe 3+ )(Al 2 Ti)(PO 4 ) 4 [O(OH)][(H 2 O) 9 (OH)]⋅4H 2 O, is a new monoclinic member of the paulkerrite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in corrosion pits of alt…
View article: Hydroxylbenyacarite, (H<sub>2</sub>O)<sub>2</sub>Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub>⋅4H<sub>2</sub>O, a new paulkerrite-group mineral, from the El Criollo mine, Cordoba Province, Argentina
Hydroxylbenyacarite, (H<sub>2</sub>O)<sub>2</sub>Mn<sub>2</sub>(Ti<sub>2</sub>Fe)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub>⋅4H<sub>2</sub>O, a new paulkerrite-group mineral, from the El Criollo mine, Cordoba Province, Argentina Open
Hydroxylbenyacarite, (H 2 O) 2 Mn 2 (Ti 2 Fe)(PO 4 ) 4 [O(OH)](H 2 O) 10 ⋅4H 2 O, is a new paulkerrite-group mineral from the El Criollo mine, Cordoba Province, Argentina (IMA2023–079). It was found in specimens of altered triplite, in ass…
View article: Macraeite, [(H<sub>2</sub>O)K]Mn<sub>2</sub>(Fe<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, a new monoclinic paulkerrite-group mineral, from the Cubos–Mesquitela–Mangualde pegmatite, Portugal
Macraeite, [(H<sub>2</sub>O)K]Mn<sub>2</sub>(Fe<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, a new monoclinic paulkerrite-group mineral, from the Cubos–Mesquitela–Mangualde pegmatite, Portugal Open
Macraeite, [(H2O)K]Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 ⋅ 4H2O, is a new monoclinic member of the paulkerrite group, from the Cubos–Mesquitela–Mangualde pegmatite, Mangualde, Portugal. It was found in phosphate nodules of weathered triplite, het…
View article: Crystal chemistry of type paulkerrite and establishment of the paulkerrite group nomenclature
Crystal chemistry of type paulkerrite and establishment of the paulkerrite group nomenclature Open
A single-crystal structure determination and refinement has been conducted for the type specimen of paulkerrite. The structure analysis showed that the mineral has monoclinic symmetry, space group P21/c, not orthorhombic, Pbca, as original…
View article: The new mineral cuprozheshengite, Pb4CuZn2(AsO4)2(PO4)2(OH)2, from Yunnan, China, with site-selective As-P substitution
The new mineral cuprozheshengite, Pb4CuZn2(AsO4)2(PO4)2(OH)2, from Yunnan, China, with site-selective As-P substitution Open
Cuprozheshengite, Pb4CuZn2(AsO4)2(PO4)2(OH)2, is a new mineral species from Yunnan, China. It occurs as sub-millimeter greenish-blue hemispherical aggregates of microscopic blade-like crystals on hemimorphite and is closely associated with…
View article: 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
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 Open
Regerite, KFe6(PO4)4(OH)7(H2O)6 ⋅ 4H2O, is the first new mineral species to be characterised from the Kreuzberg pegmatite, Pleystein, in the Oberpfalz, Bavaria. It was found in vugs on a specimen of drusy quartz, associated with rockbridge…
View article: 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
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 Open
Hochleitnerite, [K(H2O)]Mn2(Ti2Fe)(PO4)4O2(H2O)10 ⋅ 4H2O, is a new paulkerrite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in specimens of altered zwieselite, in association with fluorapatite, …
View article: Rewitzerite, K(H<sub>2</sub>O)Mn<sub>2</sub>(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub>⋅4H<sub>2</sub>O, a new monoclinic paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany
Rewitzerite, K(H<sub>2</sub>O)Mn<sub>2</sub>(Al<sub>2</sub>Ti)(PO<sub>4</sub>)<sub>4</sub>[O(OH)](H<sub>2</sub>O)<sub>10</sub>⋅4H<sub>2</sub>O, a new monoclinic paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany Open
Rewitzerite, K(H 2 O)Mn 2 (Al 2 Ti)(PO 4 ) 4 [O(OH)](H 2 O) 10 ⋅4H 2 O, is a new monoclinic member of the paulkerrite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in specimens of altered zwieselite, in…
View article: 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
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 Open
Manganrockbridgeite, Mn22+Fe33+(PO4)3(OH)4(H2O), is a new member of the rockbridgeite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria. It occurs in association with frondelite, kenngottite, hureaulite and hematite. It forms com…
View article: Pleysteinite, [(H<sub>2</sub>O)<sub>0.5</sub>K<sub>0.5</sub>]<sub>2</sub>Mn<sub>2</sub>Al<sub>3</sub>(PO<sub>4</sub>)<sub>4</sub>F<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, the Al analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany
Pleysteinite, [(H<sub>2</sub>O)<sub>0.5</sub>K<sub>0.5</sub>]<sub>2</sub>Mn<sub>2</sub>Al<sub>3</sub>(PO<sub>4</sub>)<sub>4</sub>F<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub> ⋅ 4H<sub>2</sub>O, the Al analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany Open
Pleysteinite, [(H2O)0.5K0.5]2Mn2Al3(PO4)4F2(H2O)10 ⚫ 4H2O, 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 nordga…
View article: Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria Open
Whiteite-(CaMnFe), CaMn2+Fe22+Al2(PO4)4(OH)2 ⋅ 8H2O, is a new whiteite-subgroup member of the jahnsite group from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in vugs in an altered feldspar area of a specimen comp…
View article: New secondary phosphate mineral occurrences and their crystal chemistry, at the Hagendorf Süd pegmatite, Bavaria
New secondary phosphate mineral occurrences and their crystal chemistry, at the Hagendorf Süd pegmatite, Bavaria Open
First occurrences from the Hagendorf Süd pegmatite of the secondary phosphate minerals kenngottite, Mn32+Fe43+(PO4)4(OH)6(H2O)2; allanpringite, Fe33+(PO4)2(OH)3 ⚫ 5H2O; iangreyite, Ca2Al7(PO4)2(PO3OH)2(OH,F)15 ⚫ 8H2O; and nizamoffite, MnZn…
View article: Identifying Pseudorutile and Kleberite Using Raman Spectroscopy
Identifying Pseudorutile and Kleberite Using Raman Spectroscopy Open
Pseudorutile and kleberite are intermediate minerals formed during alteration of ilmenite to rutile. They are difficult to identify, as both have a range of chemical composition and occur as small crystals commonly mixed with other mineral…
View article: Tomsquarryite, NaMgAl<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub> ● 8H<sub>2</sub>O, a new crandallite-derivative mineral from Tom's phosphate quarry, Kapunda, South Australia
Tomsquarryite, NaMgAl<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub> ● 8H<sub>2</sub>O, a new crandallite-derivative mineral from Tom's phosphate quarry, Kapunda, South Australia Open
Tomsquarryite, NaMgAl3(PO4)2(OH)6 ⚫ 8H2O, is a new secondary phosphate mineral from Tom's phosphate quarry, Kapunda, South Australia. It occurs as colourless, talc-like hexagonal platelets, with diameters of a few tens of micrometres when …
View article: Redefinition of angastonite, CaMgAl&lt;sub&gt;2&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;(OH)&lt;sub&gt;4&lt;/sub&gt; ⋅ 7H&lt;sub&gt;2&lt;/sub&gt;O, as an amorphous mineral
Redefinition of angastonite, CaMgAl<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>4</sub> ⋅ 7H<sub>2</sub>O, as an amorphous mineral Open
A reinvestigation of the type angastonite specimen from the Penrice marble quarry, South Australia, shows that the published powder X-ray diffraction pattern for the mineral corresponds to a mixture of crystalline phases plus an amorphous …
View article: Structure of the amorphous titania precursor phase of N-doped photocatalysts
Structure of the amorphous titania precursor phase of N-doped photocatalysts Open
Amorphous titania samples prepared by ammonia solution neutralization of titanyl sulphate have been characterized by chemical and thermal analyses, and with reciprocal-space and real-space fitting of wide-angle synchrotron X-ray scattering…
View article: Bulachite, [Al<sub>6</sub>(AsO<sub>4</sub>)<sub>3</sub>(OH)<sub>9</sub>(H<sub>2</sub>O)<sub>4</sub>]⋅2H<sub>2</sub>O from Cap Garonne, France: Crystal structure and formation from a higher hydrate
Bulachite, [Al<sub>6</sub>(AsO<sub>4</sub>)<sub>3</sub>(OH)<sub>9</sub>(H<sub>2</sub>O)<sub>4</sub>]⋅2H<sub>2</sub>O from Cap Garonne, France: Crystal structure and formation from a higher hydrate Open
Bulachite specimens from Cap Garonne, France, comprise two intimately mixed hydrated aluminium arsenate minerals with the same Al:As ratio of 2:1 and with different water contents. The crystal structures of both minerals have been solved u…
View article: The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain.
The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain. Open
The general structural formula for the walentaite group is [(( A 1 y A 1’ 1– y ), A 2)(H 2 O) n ][ B x ( As 2) 2– x ( As 3) M 1( M 2) 2 ( T O 4 ) 2 (O,OH) 7 ], based on heteropolyhedral layers of configuration [ M 1( M 2) 2 ( T O 4 ) 2 (O,…
View article: Halilsarpite, a new arsenate analogue of walentaite, from the Oumlil mine, Bou Azzer district, Morocco
Halilsarpite, a new arsenate analogue of walentaite, from the Oumlil mine, Bou Azzer district, Morocco Open
Halilsarpite, [Mg(H2O)6][CaAs23+(Fe2.673+Mo0.336+)(AsO4)2O7], is a new secondary mixed arsenate/arsenite mineral from the Oumlil mine, Bou Azzer district, Morocco. It forms lemon-yellow spherules, about 0.1 mm in diameter, composed of plat…