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 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+ ) 2 O 5 )(OH) 4 . It was discovered in 1821 and named in honor of Swedish mineralogist Axel Fredrik Cronstedt (1722–1765).

Mineral pleochroism table. Tabell över mineralernas pleokroism. Mineralogy Database. Database containing more than 5000 pages of mineral data, including individual mineral data descriptions with links. Headings include crystallography, chemical composition, physical and optical properties, as well as an alphabetical listing of mineral species 16 - Mineral and Gemstone Kingdom 17 - Mineralienatlas (Deutsch) 18 - NSDL Reciprocal Net (JAVA) 19 - Online Mineral Museum 20 - Philatelic Mineralogy 21 - QUT Mineral Atlas 22 - Ruff.Info 23 - Scandinavian mineral gallery 24 - WWW-MINCRYST 25 - YupRocks.

Tabell över mineralernas pleokroism. Mineralogy Database. Database containing more than 5000 pages of mineral data, including individual mineral data descriptions with links. Headings include crystallography, chemical composition, physical and optical properties, as well as an alphabetical listing of mineral species 16 - Mineral and Gemstone Kingdom 17 - Mineralienatlas (Deutsch) 18 - NSDL Reciprocal Net (JAVA) 19 - Online Mineral Museum 20 - Philatelic Mineralogy 21 - QUT Mineral Atlas 22 - Ruff.Info 23 - Scandinavian mineral gallery 24 - WWW-MINCRYST 25 - YupRocks. Search for Galena using: Cronstedtite is a rare iron silicate of the serpentine group.

This sample of cronstedtite is displayed in the Smithsonian Museum of Natural History. Cronstedtite is a silicate mineral with the composition Fe 3 (SiFe)O 5 (OH) 4. The sample at left is about 12 cm across and is from Herja, Crisana-Maramures, Romania. This sample is described as cronstedtite with siderite.

Cronstedtite Image. Comments: Pyramidal crystals of cronstedtite. Location: Santa Eulalia, Chihuahua, Mexico.

Cronstedtite - Hungary. Saved by Salvador Ascencio Tapia. Rocks And Minerals Hungary Earth Gemstones Crystals Amazing Pretty Collection Rocks.

Analysis wt% SiO 2: 17.47, Fe 2 O 3: 36.76, FeO: 36.31, H 2 O: 10.09 (Ref: Hintze, Handbuch der Mineralogie REFERENCES for Cronstedtite; American Mineralogist Crystal Structure Database Record: [view record] Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. 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.

Link to MinDat.org Location Data. Name Origin: Named for Julien Jean Joseph Fraipont (1857-1910), and Charles Fraipont, of Liege, Belgium, both geologists and paleontologists. Name Pronunciation: Fraipontite + Pronunciation. Mineral Data, Mineralienatlas Lexikon, Cronstedtite-3T.
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Strunz: 9.ED.15. Crystal 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.

Cronstedtite is most stable at the temperature of ∼0 °C at moderately oxidizing aqueous conditions and at high water/rock ratios. Although cronstedtite could form on planetesimals, the apparent lack of serpentine may indicate its formation by Ceres’ temporary surface solutions. The rare mineral cronstedtite has been first described as early as in 1820 from the Vojtěch Mine in Příbram by Steinmann in 1820 [1, 2]. It is named in honor of Swedish chemist and mineralogist Axel Fredrik Cronstedt (*23.12.1722, †19.8.1765), one of founders of the modern mineralogy.
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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. Silicon 13.01 % Si 27.83 % SiO 2. Hydrogen 1.24 % H 11.13 % H 2 O. Oxygen 44.46 % O.

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The rare mineral cronstedtite has been first described as early as in 1820 from the Vojtěch Mine in Příbram by Steinmann in 1820 [1, 2]. It is named in honor of Swedish chemist and mineralogist Axel Fredrik Cronstedt (*23.12.1722, †19.8.1765), one of founders of the modern mineralogy.

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Name Origin: Named for Julien Jean Joseph Fraipont (1857-1910), and Charles Fraipont, of Liege, Belgium, both geologists and paleontologists. Name Pronunciation: Fraipontite + Pronunciation. PDF | We present the first detailed crystallo-chemical and crystallographic description of cronstedtite with extraterrestrial origin. The analysed | Find, read and cite all the research you 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+ ) 2 O 5 )(OH) 4 .