Cronstedtite is a rare iron silicate of the serpentine group. This very rich and showy little specimen is festooned with lustrous, black, trigonal crystals to 3 mm on a 3-dimensional crust of matrix. It is a rare occurrence to have such a rich coverage of cronstedtite, and this specimen displays very well.

Hendricks S B (1939) Random structures of layer minerals as illustrated by cronstedtite (2FeO.Fe2O3.SiO2.2H2O). Possible iron content of kaolin American Mineralogist 24 529-539: 1939: 0: 293: 0007145: Cronstedtite: Hybler J (2006) Parallel intergrowths in cronstedtite-1T: determination of the degree of disorder European Journal of Mineralogy 18

Link to MinDat.org Location Data. Name Origin: Named for Axel Fredrik Cronstedt (1722-1765), Swedish mineralogist and chemist. Name Pronunciation: Cronstedtite + Pronunciation. Name: Named by Josef Johann Steinmann in 1821 in honor of Axel Fredrik Cronstedt (1722-1765), Swedish chemist and mineralogist who discovered nickel, scheelite and coined the term zeolite. Cronstedt's mineralogical books revolutionized mineralogy and he is sometimes regarded as the father of modern mineralogy. Cronstedtite Mineral Data General Cronstedtite Information. Silicon 7.03 % Si 15.04 % SiO 2 A low-temperature hydrothermal product in ore veins.

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Den kemiska formeln är Ca 2 (Mg,Fe) 5 Si 8 O 22 2. Nefriten är seg och känns fet vid beröring. Till skillnad från den liknande jadeiten skiljer den sig lättast genom sin CRONSTEDTITE is a word in English with its meaning. A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- Rocks and minerals can be easily identified once you know what to look for. There are three different types of rocks: Igneous, Metamorphic and Sedimentary. Minerals must meet several requirements, including being naturally occurring and ino Mineral salts are substances extracted from bodies of water and below the Earth's surface. Some examples of mineral salts include sodium, chlorine, calcium, phosphate, magnesium, sulfur, potassium, and phosphorus.

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Cronstedtite-1M mineral data, information about Cronstedtite-1M, its properties and worldwide locations.

SUPPORT US . Covid-19 has significantly affected our fundraising. Cronstedtite Fe2+ 2 Fe 3+(SiFe3+)O5(OH)4 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Triclinic, monoclinic, or hexagonal.

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.

Twinning: Twin axis [001]; interpenetrating trigonal pyramids 4.4 x 3.4 x 2.8 cm. Cronstedtite is a rare iron silicate of the Serpentine-Kaolinite Group and historic Pribram is the Type Locality. Lustrous, sub-metallic gray-black crystals to about 2 mm are nestled in a quartz-lined vug on this showy combination specimen from the Josef Vajdak Collection, a noted Czech specialist. Such specimens are very Cronstedtite is a complex iron silicate mineral belonging to the serpentine group of minerals. Its chemical formula is Fe 2+ 2 Fe 3+ (Si,Fe 3+ O 5)(OH) 4. It was discovered in 1821 and named in honor of Swedish mineralogist Axel Fredrik Cronstedt (1722–1765). It has been found in Bohemia in the Czech Republic and in Cornwall, England.

Link to MinDat.org Location Data. Name Origin: Named for Axel Fredrik Cronstedt (1722-1765), Swedish mineralogist and chemist.
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This very rich and showy little specimen is festooned with lustrous, black, trigonal crystals to 3 mm on a 3-dimensional crust of matrix. 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, Mineralienatlas Lexikon, Cronstedtite.
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Learning the basics of mineral identification is easy. All you need are a few simple tools and your own powers of careful observation. Almost all rocks are made of minerals. The exceptions are obsidian (which is made of volcanic glass) and

Sep 25, 2015 - Cronstedtite avec 2 générations de croissance. Nagybörzsöny, Hungary Media Data Show, Mineralienatlas Lexikon FMF Minerals Gallery.