...Mark A. Cooper; Gunnar Raade; Neil A. Ball; Yassir A. Abdu; Frank C. Hawthorne; Ralph Rowe ABSTRACT Folvikite, Sb 5+ Mn 3+ (Mg,Mn 2+ ) 10 O 8 (BO 3 ) 4 , is a new oxyborate mineral from the Kitteln mine, Värmland, Sweden, where it occurs as a primary skarn mineral embedded in calcite. It forms...

...Simona Bigi; Maria Franca Brigatti; Silvio Capedri Abstract Warwickite is an orthorhombic oxyborate mineral with the general formula [6] M 2 O [3] BO 3 (M = Mg 2+ , Mn 2+ , Fe 3+ , Ti 4+ , Al 3+ ). The studied warwickite samples are from lamproitic rocks (umillites) and associated carbonatite-like...

... are examined to show the relationships between the CS and polysomatic models. Polysomatic structures that have been described as periodic chemical-twinning (CT) structures include certain sulfosalts, oxyborates, the enstatite-IV series, and the humite group. Some polysomatic series possess a chain structure...

... silicates and silicates with complex tetrahedral layers, graphite, sulfides, high-temperature superconductors, oxyborates, etc. A symbolic notation Zvyagin proposed for description of polytypes is very reasonable and effective. Comparing their approaches, Bailey noted that Zvyagin’s system is “a more...

... 2 BO 3 , is the heterovalent-iron end-member of the ludwigite group of high-temperature contact-metamorphic oxyborates. Vonsenite forms a continuous isomorphic solid-solution series with ludwigite sensu stricto, Mg 2 Fe 3+ O 2 BO 3 ( Tschermak 1874 ). The ludwigite group minerals are common...

.... D.B. M.A. Cooper, G. Raade, N.A. Ball, Y.A. Abdu, F.C. Hawthorne, and R. Rowe (2018) Folvikite, Sb 5+ Mn 3+ (Mg,Mn 2+ ) 10 O 8 (BO 3 ) 4 , a new oxyborate mineral from the Kitteln mine, Nordmark ore district, Värmland, Sweden: Description and crystal structure. Mineralogical Magazine, 82(4...

... , No. 1 , 220 . Pouchou , J.L. & Pichoir , F. ( 1984 ): A new model for quantitative x-ray miicroanalysis. Part I: Application to the analysis of homogeneous sample . Rech. Aérosp ., 1984 -3, 13 – 18 . Rudnev , V.V. ( 1996 ): Monoclinic iron-magnesium oxyborates...

... . Corbel , G. , Leblanc , M. ( 2000 ): Crystal structure of Na 2 M 2 (BO 3 ) 2 O (M = Al, Ga); comparison with other layered oxyborates and SiP 2 O 7 . J. Solid State Chem. , 154 , 344 – 349 . Dowty , E. ( 2011 ): ATOMS for Windows, Version 6.4 . Shape Software , Kingsport, USA...

.... ( 1990 ) A crystal growth scenario from HREM studies of pinakiolite related oxyborates . Microscopy, Microanalysis, Microstructures , 1 , 365 – 372 . Brisi , C. , and Eitel , W. ( 1957 ) Identity of nocerite and fluoborite . American Mineralogist , 42 , 288 – 293...

...-(Yb), (Y 0.51 Ln 0.36 Ca 0.13 ) Fe 0.065 Be(SiO 4 )(OH) . Kristallografiya , 28 , 457 – 460 [in Russian] . Yu H. Pan S. Wu H. Zhao W. Zhang F. Li H. Yang Z. ( 2012 ) A new congruent-melting oxyborate, Pb 4 O(BO 3 ) 2 with optimally aligned BO 3 triangles...