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Primary terms
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Africa
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East Africa
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Tanzania (1)
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North Africa
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Atlas Mountains
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Moroccan Atlas Mountains
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Anti-Atlas (1)
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Mesozoic
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Mishash Formation (1)
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Ghareb Formation (1)
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metal ores
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metamorphic rocks
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metasomatism (5)
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meteorites
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MacAlpine Hills Meteorites (1)
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stony meteorites
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achondrites
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Journal Article
Titanium substitutions in garnet at magmatic, granulite facies, and high-pressure granulite facies conditions Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2025
American Mineralogist (2025) 110 (5): 731–747.
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Journal Article
Synthesis and characterization of Fe-poor olivine with applications to the surface of Mercury Open Access
Brendan A. Anzures, Kathleen E. Vander Kaaden, Francis M. McCubbin, Richard L. Rowland, II, Gordon M. Moore, Kelsey Prissel, Richard V. Morris, Rachel L. Klima, Karen R. Stockstill-Cahill, David G. Agresti
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2025
American Mineralogist (2025) 110 (4): 570–581.
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Journal Article
Cabrerite, NiMg 2 (AsO 4 ) 2 ·8H 2 O, a new old mineral: The ordered intermediate between annabergite and hörnesite Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2025
American Mineralogist (2025) 110 (4): 643–649.
... is monoclinic, C 2/ m , a = 10.2054(11), b = 13.3772(13), c = 4.7382(4) Å, β = 105.057(7)°, V = 624.66(11) Å 3 , and Z = 2. The mineral has a vivianite-type structure ( R 1 = 0.0353 for 668 I > 2σ I reflections) in which M lO 2 (H 2 O) 4 octahedra and M 2 2 O 6 (H 2 O) 4 edge-sharing octahedral dimers...
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Journal Article
Al 3+ and H + substitutions in TiO 2 polymorphs: Structural and vibrational investigations Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2025
American Mineralogist (2025) 110 (2): 241–254.
... ends sealed by an electric spot welder, and 1 μL of distilled H 2 O was added to the starting material to guarantee saturated water fugacity. The 14/8 assemblages (i.e., 14 mm periclase octahedra and 25.4 mm tungsten carbide anvils with 8 mm corner truncations) were adopted to synthesize the CaCl 2...
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Identification of Hydroandradite in CM Carbonaceous Chondrites: A Product of Calc-Silicate Alteration on C-Complex Asteroids Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 30 December 2024
American Mineralogist (2024)
Early Publication
Journal Article
New Minerals from the Redmond Mine, North Carolina, USA: IX. Siligiite, a Lead-Zinc Sulfate with a Novel Heteropolyhedral Sheet Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 18 December 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (6): 881–889.
... of Zn(OH) 6 octahedra and Zn(OH) 4 tetrahedra. A Pb 2+ cation, an SO 4 2− group, and several H 2 O groups are located between successive sheets. The new mineral described herein is named siligiite (/si: li: 'gi: ait/) based on the Cherokee word siligi (ᏏᎵᎩ in the Tsalagi language) meaning silk...
Journal Article
Wenlanzhangite–(Y) from the Yushui deposit, South China: A potential proxy for tracing the redox state of ore formation Available to Purchase
Peng Liu, Guowu Li, Ningyue Sun, Wei Yao, Hong Yu, Yongfei Tian, Wenqiang Yang, Fengshang Zhao, Nigel J. Cook
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 2024
American Mineralogist (2024) 109 (10): 1738–1747.
... (IMA2022-142). The structure of wenlanzhangite-(Y) is composed of a -axis-oriented chains of [VO 6 ] octahedra consisting of edge-sharing octahedra linked by insular [SiO 4 ] tetrahedra, leaving open channels occupied by rare earth elements. Observed compositional variation and crystal structure...
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Journal Article
Structural rationale for twinning in galena, and a possible relation with the lillianite homologous series – Revision 1 Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 20 September 2024
American Mineralogist (2024)
... or a Mg atom onto an Fe2+ atom centering two octahedra. 82 In order for a twin to form, a substantial substructure should cross the interface, more or less 83 unperturbed. The values of D for each crystallographic orbit measure the degree of perturbation. 84 The distribution of values of D around...
Early Publication
Journal Article
Influence of Fe(II), Fe(III), and Al(III) isomorphic substitutions on acid-base properties of edge surfaces of cis -vacant montmorillonite: Insights from first-principles molecular dynamics simulations and surface complexation modeling Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2024
American Mineralogist (2024) 109 (7): 1162–1170.
... the first-principles molecular dynamics (FPMD) based vertical energy gap method. Fe(II) and Fe(III) substitutions resulted, respectively, in a significant increase and decrease in p K a values of amphoteric groups directly associated with Fe octahedra. In addition, Fe(II) substitution increased the p K...
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Journal Article
Monoclinic Pleysteinite and Hochleitnerite from the Hagendorf-Süd Pegmatite: Synchrotron Microfocus Diffraction Studies on Twinned Members of Paulkerrite-Group Minerals Available to Purchase
Christian Rewitzer, Rupert Hochleitner, Ian E. Grey, Colin M. Macrae, William G. Mumme, Stephanie Boer, Anthony R. Kampf, Robert W. Gable
Publisher: Mineralogical Association of Canada
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 513–527.
... general description of the crystal structure of the paulkerrite-group minerals is in terms of a structural unit plus an interstitial complex, using the terminology of Hawthorne ( Hawthorne 1992 , Hawthorne & Schindler 2008 ). The structural unit is a 3D anionic framework of corner-connected octahedra...
Journal Article
New Minerals from the Redmond Mine, North Carolina, USA: VII. Zincochenite, the Zn Analogue of Chenite Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 529–536.
... with chenite. In the crystal structure ( R 1 = 0.0874 for 936 I > 2σ I ), short bonds between the Pb atoms and OH groups define a chain along [011] and these chains are bridged by ZnO 2 (OH) 4 octahedra to form sheets parallel to . SO 4 tetrahedra decorate both sides of the sheets. The sheets are linked...
Journal Article
Single-crystal X-ray diffraction on the structure of (Al,Fe)-bearing bridgmanite in the lower mantle Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2024
American Mineralogist (2024) 109 (5): 872–881.
... Fe ions in bridgmanite and their effects on unit-cell volumes ( Hsu et al. 2010 , 2011 , 2012 ; Shukla et al. 2016 ). For an ideal perovskite structure, the A and B sites have twelve-fold and sixfold coordination to form AO 12 dodecahedra and BO 6 octahedra, respectively ( Fig. 3a ). Kudoh...
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Journal Article
Znucalite, the only known zinc uranyl carbonate: Its crystal structure and environmental implications Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2024
American Mineralogist (2024) 109 (5): 949–959.
... (CO 3 ) 2 ] double sheet (with Zn 2+ both in octahedra and tetrahedra), which is connected to a thick interlayer that hosts U 6+ , Ca 2+ , and H 2 O molecules. The linkage between structural units and the interlayer occurs via the vertices of ZnO 4 tetrahedra protruding from the sheet...
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Journal Article
The migration and occupation of Li + and Na + in illite and montmorillonite during the heating process: Nanominerals and mineral nanoparticles – thematic issue Available to Purchase
Journal: Mineralogical Magazine
Published: 25 April 2024
Mineralogical Magazine (2024) 88 (5): 536–545.
... type includes one tetrahedral sheet and one octahedral sheet (Cao et al. , 2021 ), whereas the 2:1 type includes two tetrahedral sheets with one octahedral sheet situated between them (Bodart et al. , 2018 ). The octahedra come in two forms: (1) dioctahedral, wherein two thirds of the octahedral...
Journal Article
Interfacial interactions controlling adsorption of metal cations on montmorillonite Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2024
American Mineralogist (2024) 109 (4): 633–655.
... et al. 2006 ). Natural Mt predominantly exhibits a cis -vacant T-O-T layer comprising both cis -(OH groups on adjacent corners) and trans -octahedra (OH groups on opposite corners) within the octahedral sheet ( Gao et al. 2023 ), while the trans -vacant variant is relatively less abundant...
Journal Article
The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part V. Zilbermintsite-(La), (CaLa 5 )(Fe 3+ Al 3 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 5 O(OH) 3 , a new mineral with ET2 type structure and a definition of the radekškodaite group Available to Purchase
Anatoly V. Kasatkin, Natalia V. Zubkova, Radek Škoda, Igor V. Pekov, Atali A. Agakhanov, Vladislav V. Gurzhiy, Dmitriy A. Ksenofontov, Dmitriy I. Belakovskiy, Aleksey M. Kuznetsov
Journal: Mineralogical Magazine
Published: 21 March 2024
Mineralogical Magazine (2024) 88 (3): 302–311.
... to unity. The crystal structure of zilbermintsite-(La) ( Fig. 4 ) consists of the chains of edge-sharing octahedra running along the b axis: single chains of the M (2)- and M (4)-centred octahedra and branched chains with the M (1)-centred octahedra in the central part, and the M (3)-centred...
Journal Article
Hydroxylbenyacarite, (H 2 O) 2 Mn 2 (Ti 2 Fe)(PO 4 ) 4 [O(OH)](H 2 O) 10 ⋅4H 2 O, a new paulkerrite-group mineral, from the El Criollo mine, Cordoba Province, Argentina Available to Purchase
Rupert Hochleitner, Christian Rewitzer, Ian E. Grey, Anthony R. Kampf, Colin M. MacRae, Robert W. Gable, William G. Mumme
Journal: Mineralogical Magazine
Published: 19 March 2024
Mineralogical Magazine (2024) 88 (3): 327–334.
... octahedra that share corners with PO 4 tetrahedra to form 10-member rings parallel to (010). K + cations and water molecules are located in interstitial sites within the rings. Additional corner-sharing of the PO 4 tetrahedra with MnO 2 (H 2 O) 4 octahedra occurs along [010] to complete the 3D framework...
Journal Article
Trebiskyite, the First Titanium-Decavanadate Mineral Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 18 January 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (1): 117–132.
... of chains of distorted octahedrally coordinated Na + and regular Mg[O(H 2 O) 5 ] octahedra. The observed low incident bond valence to the V1 site (4.45 vu ) and marked deviation in vanadyl and V–O eq bond lengths indicate that this site is host to the essential Ti 4+ identified during chemical analyses...
Journal Article
Structure and titanium distribution of feiite characterized using synchrotron single-crystal X-ray diffraction techniques Available to Purchase
Claire Zurkowski, Barbara Lavina, Kelsey Prissel, Stella Chariton, Vitali B. Prakapenka, Yingwei Fei
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 144–149.
... of alternating layers of FeO 6 and TiO 6 octahedra and ulvöspinel, Fe 2 TiO 4 , consists of FeO 4 tetrahedra and (Fe, Ti)O 6 octahedra. End-member feiite (Fe 2+ ) 3 TiO 5 , based on electron backscatter diffraction analyses of natural feiite grains from Shergotty ( Ma et al. 2021 ), is assumed to adopt...
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Journal Article
An UV/Vis/NIR optical absorption spectroscopic and color investigation of transition-metal-doped gahnite (ZnAl 2 O 4 spinel) crystals grown by the flux method Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 157–166.
..., displays euhedral crystals with flat smooth faces and sharp edges. The second, also rare, shows flattened (111) twins. A third rather unusual type shows octahedra having square pits at the vertices. The fourth, most common crystal type, includes individuals with several triangular growth plates of variable...
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