518

Evidence for nanocrystals of vorlanite, a rare uranate mineral, in the Nopal I low-temperature uranium deposit (Sierra Peña Blanca, Mexico)
Guillaume Othmane, Thierry Allard, Nicolas Menguy, Guillaume Morin, Imène Esteve, Mostafa Fayek, and Georges Calas

285

Pressure-induced structural transformations in the low-cristobalite form of AlPO₄
H.K. Poswal, Nandini Garg, Maddury Somayazulu, and Surinder M. Sharma

292

Hydrokenomicrolite, (,H₂O)₂Ta₂(O,OH)₆(H₂O), a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil
Marcelo B. Andrade, Daniel Atencio, Nikita V. Chukanov, and Javier Ellena

297

Fluor-elbaite, Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F, a new mineral species of the tourmaline supergroup
Ferdinando Bosi, Giovanni B. Andreozzi, Henrik Skogby, Aaron J. Lussier, Yassir Abdu, and Frank C. Hawthorne

304

Microtexture development during rapid cooling in three rhyolitic lava flows
Sheila J. Seaman

319

Microbial and inorganic control on the composition of clay from volcanic glass alteration experiments
Javier Cuadros, Beytullah Afsin, Premroy Jadubansa, Mahmoud Ardakani, Carmen Ascaso, and Jacek Wierzchos

335

High-pressure experiments on phase transition boundaries between corundum, Rh₂O₃(II)- and CaIrO₃-type structures in Al₂O₃
Jinya Kato, Kei Hirose, Haruka Ozawa, and Yasuo Ohishi

340

Electronic structure effects in the vectorial bond-valence model
Barry R. Bickmore, Matthew F.C. Wander, Joel Edwards, Josh Maurer, Kendrick Shepherd, Eric Meyer, W. Joel Johansen, Rose A. Frank, Charles Andros, and Matthew Davis

350

Geometric analysis of radiation damage connectivity in zircon, and its implications for helium diffusion
Richard A. Ketcham, William R. Guenthner, and Peter W. Reiners

361

Superstructure, crystal chemistry, and cation distribution in filipstadite, a Sb⁵⁺-bearing, spinel-related mineral
Paola Bonazzi, Laura Chelazzi, and Luca Bindi

367

A high-temperature Brillouin scattering study on four compositions of haplogranitic glasses and melts: High-frequency elastic behavior through the glass transition
Anwar Hushur, Murli H. Manghnani, Quentin Williams, and Donald B. Dingwell

376

Hydrogen isotope fractionation between coexisting hydrous melt and silicate-saturated aqueous fluid: An experimental study in situ at high pressure and temperature
Bjorn Mysen

387

Eclogitic clasts with omphacite and pyrope-rich garnet in the NWA 801 CR2 chondrite
Makoto Kimura, Naoji Sugiura, Takashi Mikouchi, Takao Hirajima, Hajime Hiyagon, and Yoshie Takehana

394

Hydration properties of synthetic high-charge micas saturated with different cations: An experimental approach
Esperanza Pavón, Miguel A. Castro, Moisés Naranjo, M. Mar Orta, M. Carolina Pazos, and María D. Alba

401

Quantitative analyses of powdered multi-minerallic carbonate aggregates using a portable Raman spectrometer
Petra Kristova, Laurence Hopkinson, Ken Rutt, Hazel Hunter, and Gordon Cressey

410

Periodic ab initio bulk investigation of hydroxylapatite and type A carbonated apatite with both pseudopotential and all-electron basis sets for calcium atoms
Gianfranco Ulian, Giovanni Valdrè, Marta Corno, and Piero Ugliengo

417

Coexisting pseudobrookite, ilmenite, and titanomagnetite in hornblende andesite of the Coleman Pinnacle flow, Mount Baker, Washington: Evidence for a highly oxidized arc magma
Emily K. Mullen and I. Stewart McCallum

426

Geochemistry of pyrochlore minerals from the Motzfeldt Center, South Greenland: The mineralogy of a syenite-hosted Ta, Nb deposit
Jamie A. McCreath, Adrian A. Finch, Donald A. Herd, and Ashlyn Armour-Brown

439

Phosphovanadylite-Ca, Ca[V⁴⁺₄P₂O₈(OH)₈]·12H₂O, the Ca analogue of phosphovanadylite-Ba
Anthony R. Kampf, Barbara P. Nash, and Thomas A. Loomis

444

The relationship between REE-Y-Nb-Th minerals and the evolution of an A-type granite, Wentworth Pluton, Nova Scotia
Angeliki D. Papoutsa and Georgia Pe-Piper

463

Prewittite, KPb_1.5Cu₆Zn(SeO₃)₂O₂Cl₁₀, a new mineral from Tolbachik fumaroles, Kamchatka peninsula, Russia: Description and crystal structure
Robert R. Shuvalov, Lidiya P. Vergasova, Tatyana F. Semenova, Stanislav K. Filatov, Sergey V. Krivovichev, Oleg I. Siidra, and Nikolay S. Rudashevsky

470

Lucabindiite, (K,NH₄)As₄O₆(Cl,Br), a new fumarole mineral from the “La Fossa” crater at Vulcano, Aeolian Islands, Italy
Anna Garavelli, Donatella Mitolo, Daniela Pinto, and Filippo Vurro

478

Scottyite, the natural analog of synthetic BaCu₂Si₂O₇, a new mineral from the Wessels mine, Kalahari Manganese Fields, South Africa
Hexiong Yang, Robert T. Downs, Stanley H. Evans, and William W. Pinch

485

Oxy-schorl, Na(Fe²⁺₂Al)Al₆Si₆O₁₈(BO₃)₃(OH)₃O, a new mineral from Zlatá Idka, Slovak Republic and PÅ™ibyslavice, Czech Republic
Peter Bačík, Jan Cempírek, Pavel Uher, Milan Novák, Daniel Ozdín, Jan Filip, Radek Škoda, Karel Breiter, Mariana Klementová, Rudolf Ďuďa, and Lee A. Groat

493

Crystal chemistry and hydrogen bonding of rustumite Ca₁₀(Si₂O₇)₂(SiO₄)(OH)₂Cl₂ with variable OH, Cl, F
Frank Gfeller, Thomas Armbruster, Evgeny V. Galuskin, Irina O. Galuskina, Biljana Lazic, Valentina B. Savelyeva, Aleksandr E. Zadov, Piotr Dzierżanowski, and Viktor M. Gazeev

501

Oxy-vanadium-dravite, NaV₃(V₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O: Crystal structure and redefinition of the “vanadium-dravite” tourmaline
Ferdinando Bosi, Leonid Z. Reznitskii, and Eugene V. Sklyarov

506

Lead-tellurium oxysalts from Otto Mountain near Baker, California: VIII. Fuettererite, Pb₃Cu²⁺₆Te⁶⁺O₆(OH)₇Cl₅, a new mineral with double spangolite-type sheets
Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, and Joseph Marty

512

Lead-tellurium oxysalts from Otto Mountain near Baker, California: IX. Agaite, Pb₃Cu²⁺Te⁶⁺O₅(OH)₂(CO₃), a new mineral with CuO₅-TeO₆ polyhedral sheets
Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, and Joseph Marty

522

BOOK REVIEW: FORMATION AND EVOLUTION OF AFRICA: A SYNOPSIS OF 3.8 GA OF EARTH HISTORY edited by D.J.J. van Hinsbergen, S.J.H Buiter, T.H. Torsvik, G. Gaina, and S.J. Webb (2011) Geological Society London Special Publication number 357. 378 pp. ISBN: 1-86239-335-4.
Maarten de Wit

524

ERRATUM: Nomenclature of the tourmaline-supergroup minerals by Darrell J. Henry, Milan Novák, Frank C. Hawthorne, Andreas Ertl, Barbara L. Dutrow, Pavel Uher, and Federico Pezzotta (May-June, vol. 96, p. 895–913, 2011: Article DOI: http://dx.doi.org/10.2138/am.2011.3636. Erratum DOI: http://dx.doi.org/10.2138/am.2013.614.)

525

REVIEWERS Thanks 2012

285

Pressure-induced structural transformations in the low-cristobalite form of AlPO₄
H.K. Poswal, Nandini Garg, Maddury Somayazulu, and Surinder M. Sharma

292

Hydrokenomicrolite, (,H₂O)₂Ta₂(O,OH)₆(H₂O), a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil
Marcelo B. Andrade, Daniel Atencio, Nikita V. Chukanov, and Javier Ellena

297

Fluor-elbaite, Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F, a new mineral species of the tourmaline supergroup
Ferdinando Bosi, Giovanni B. Andreozzi, Henrik Skogby, Aaron J. Lussier, Yassir Abdu, and Frank C. Hawthorne

340

Electronic structure effects in the vectorial bond-valence model
Barry R. Bickmore, Matthew F.C. Wander, Joel Edwards, Josh Maurer, Kendrick Shepherd, Eric Meyer, W. Joel Johansen, Rose A. Frank, Charles Andros, and Matthew Davis

361

Superstructure, crystal chemistry, and cation distribution in filipstadite, a Sb⁵⁺-bearing, spinel-related mineral
Paola Bonazzi, Laura Chelazzi, and Luca Bindi

394

Hydration properties of synthetic high-charge micas saturated with different cations: An experimental approach
Esperanza Pavón, Miguel A. Castro, Moisés Naranjo, M. Mar Orta, M. Carolina Pazos, and María D. Alba

410

Periodic ab initio bulk investigation of hydroxylapatite and type A carbonated apatite with both pseudopotential and all-electron basis sets for calcium atoms
Gianfranco Ulian, Giovanni Valdrè, Marta Corno, and Piero Ugliengo

439

Phosphovanadylite-Ca, Ca[V⁴⁺₄P₂O₈(OH)₈]·12H₂O, the Ca analogue of phosphovanadylite-Ba
Anthony R. Kampf, Barbara P. Nash, and Thomas A. Loomis

444

The relationship between REE-Y-Nb-Th minerals and the evolution of an A-type granite, Wentworth Pluton, Nova Scotia
Angeliki D. Papoutsa and Georgia Pe-Piper

463

Prewittite, KPb_1.5Cu₆Zn(SeO₃)₂O₂Cl₁₀, a new mineral from Tolbachik fumaroles, Kamchatka peninsula, Russia: Description and crystal structure
Robert R. Shuvalov, Lidiya P. Vergasova, Tatyana F. Semenova, Stanislav K. Filatov, Sergey V. Krivovichev, Oleg I. Siidra, and Nikolay S. Rudashevsky

470

Lucabindiite, (K,NH₄)As₄O₆(Cl,Br), a new fumarole mineral from the “La Fossa” crater at Vulcano, Aeolian Islands, Italy
Anna Garavelli, Donatella Mitolo, Daniela Pinto, and Filippo Vurro

478

Scottyite, the natural analog of synthetic BaCu₂Si₂O₇, a new mineral from the Wessels mine, Kalahari Manganese Fields, South Africa
Hexiong Yang, Robert T. Downs, Stanley H. Evans, and William W. Pinch

485

Oxy-schorl, Na(Fe²⁺₂Al)Al₆Si₆O₁₈(BO₃)₃(OH)₃O, a new mineral from Zlatá Idka, Slovak Republic and PÅ™ibyslavice, Czech Republic
Peter Bačík, Jan Cempírek, Pavel Uher, Milan Novák, Daniel Ozdín, Jan Filip, Radek Škoda, Karel Breiter, Mariana Klementová, Rudolf Ďuďa, and Lee A. Groat

493

Crystal chemistry and hydrogen bonding of rustumite Ca₁₀(Si₂O₇)₂(SiO₄)(OH)₂Cl₂ with variable OH, Cl, F
Frank Gfeller, Thomas Armbruster, Evgeny V. Galuskin, Irina O. Galuskina, Biljana Lazic, Valentina B. Savelyeva, Aleksandr E. Zadov, Piotr Dzierżanowski, and Viktor M. Gazeev

501

Oxy-vanadium-dravite, NaV₃(V₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O: Crystal structure and redefinition of the “vanadium-dravite” tourmaline
Ferdinando Bosi, Leonid Z. Reznitskii, and Eugene V. Sklyarov

506

Lead-tellurium oxysalts from Otto Mountain near Baker, California: VIII. Fuettererite, Pb₃Cu²⁺₆Te⁶⁺O₆(OH)₇Cl₅, a new mineral with double spangolite-type sheets
Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, and Joseph Marty

512

Lead-tellurium oxysalts from Otto Mountain near Baker, California: IX. Agaite, Pb₃Cu²⁺Te⁶⁺O₅(OH)₂(CO₃), a new mineral with CuO₅-TeO₆ polyhedral sheets
Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, and Joseph Marty

518

Evidence for nanocrystals of vorlanite, a rare uranate mineral, in the Nopal I low-temperature uranium deposit (Sierra Peña Blanca, Mexico)
Guillaume Othmane, Thierry Allard, Nicolas Menguy, Guillaume Morin, Imène Esteve, Mostafa Fayek, and Georges Calas