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One black crystal originally considered to be cronstedtite was identified as (111) twinned sphalerite. Some crystals of cronstedtite are covered partially by a honey-brown crust or small crystals of siderite. This is a preview of subscription content, log in to check access. Cronstedtite: R061026 (Fe 2 University of Arizona Mineral Museum 10606: Enter search criteria or leave all the fields blank to retrieve all available data. Cronstedtite Fe2+ 2 Fe 3+(SiFe3+)O5(OH)4 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Triclinic, monoclinic, or hexagonal.

Individual member mineral of the Serpentine group with a chemical formula of Fe 2+ 2 Fe 3+ (SiFe 3+)O 5 (OH) 4. Back Breakdown of Mineral Species In Webmineral # of Species . Remarks: 2,722: Valid Mineral Species Approved by the IMA. 1,627: Current Count of Valid Minerals prior to 1959 (Grandfathered species). 4,349: Total Valid Species: 111: Not Approved by the IMA. 81: Formerly valid species Discredited by the IMA. 149: Proposed new minerals awaiting Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure : Cronstedtite: Hybler J : European Journal of Mineralogy 18 (2006) 197-205: Parallel intergrowths in cronstedtite-1T: determination of the degree of disorder: Locality: Lostwithiel, England: Sample: LOS: Note One black crystal originally considered to be cronstedtite was identified as (111) twinned sphalerite. Some crystals of cronstedtite are covered partially by a honey-brown crust or small crystals of siderite.

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Cell Dimensions: a = 7.87, b = 4.73, c = 10.27, Z = 2; beta = 109.033° V = 361.40 Den (Calc)= 3.51. Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2 1 /c.

Dayton, Ohio - Handelstorget 937-853 Phone Numbers

Mineral: CRONSTEDTITE: Formula: Fe 2+ 2 Fe 3+ (SiFe 3+)O 5 (OH) 4: Crystal System: Monoclinic: Strunz Nr: 8/H.27-120: Group: Kaolinite-Serpentine group Serpentine subgroup: References: AM 47 (1962), 781; HB2/1 (1995); L 1 (2013), 8 Mineral Data, Mineralienatlas Lexikon, Cronstedtite-3T. Smrčok, L'., Ďurovič, S., Petříček, V. and Weiss, Z. - Refinement of the crystal structure of Complete Information Guide to Rocks, Minerals, & Gemstones . Minerals. Minerals & Varieties. View All Minerals; View by Alphabetical Order ; Varieties and Other Names; Mineral Search; Cronstedtite. Individual member mineral of the Serpentine group with a chemical formula of Fe 2+ 2 Fe 3+ Cronstedtite is a complex iron silicate mineral belonging to the serpentine group of minerals. It has a formula of Fe 2+ 2 Fe 3+ (Si, Fe 3+ O 5)(OH) 4.

Magnesium 7.51 % Mg 12.45 % MgO. Manganese 25.45 % Mn 32.86 % MnO. Aluminum 8.33 % Al 15.74 % Al 2 O 3. Silicon 13.01 % Si 27.83 % SiO 2.
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7A-Cronstedtite. Fe++. 2Fe+++. Data consultation – Minerals.

Data courtesy of Webmineral.
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Cornwallite and Agardite-Ce: Minerals and gemstones

Name. Formula Cronstedtite(Th), Fe3SiAlO5(OH) 4, 370.63, 90.44.

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. This and many more mineral specimens are available for sale at Dakota Matrix Minerals.

It is a rare occurrence to have such a rich coverage of cronstedtite, and this specimen displays very well. This is a classic Mineral Data: Click here to view Cronstedtite data: Locality Data: Click here to view Maribo meteorite, Lolland, Zealand Region, Denmark . Mineral and/or Locality . Molecular Weight = 323.85 gm. Magnesium 7.51 % Mg 12.45 % MgO. Manganese 25.45 % Mn 32.86 % MnO. Aluminum 8.33 % Al 15.74 % Al 2 O 3.