• Riebeckite - Wikipedia

    en.wikipedia.org/wiki/Riebeckite Riebeckite is a sodium-rich member of the amphibole group of silicate minerals, chemical formula Na 2 (Fe 2+ 3 Fe 3+ 2)Si 8 O 22 (OH) 2.It forms a solid solution series with magnesioriebeckite. It crystallizes in the monoclinic system, usually as long prismatic crystals showing a diamond-shaped cross section, but also in fibrous, bladed, acicular, columnar, and radiating forms.
  • Riebeckite | mineral | Britannica

    www.britannica.com/science/riebeckite Riebeckite is a moderately hard mineral with a glassy lustre. It forms prismatic crystals that are dark blue or black in colour. A fibrous variety, crocidolite, is of metamorphic origin and is commonly called blue asbestos. The mineral is associated with acidic igneous rocks such as granites and syenites.
  • Riebeckite: The amphibole mineral riebeckite (crocidolite ...

    www.minerals.net/mineral/riebeckite.aspx Riebeckite forms in two very different habits. The darker-colored forms which are individually crystallized are generally of igneous origin, such as volcanic rock and pegmatites. The finely fibrous variety, known as Crocidolite, usually originates from altered metamorphic rocks. The Crocidolite variety is a type of asbestos, and is sometimes also referred to as "blue asbestos".
  • Wisconsin Geological & Natural History Survey » Riebeckite

    wgnhs.wisc.edu/minerals/riebeckite Description: Riebeckite is a sodium-rich member of the amphibole family. It typically forms dark blue elongated to fibrous crystals in highly sodic granites, syenites, iron formations and schists. JACKSON COUNTY: Minor riebeckite occurs in the iron formation and along later joints at the Jackson County Iron Mine, SE sec. 15 T.21N. R.3W. near ...
  • Riebeckite - Sandatlas

    www.sandatlas.org/riebeckite Riebeckite is an amphibole group mineral. Amphiboles are hydrous silicate minerals. They are widespread in metamorphic and igneous rocks. Amphibole crystals are elongated because of their crystal structure which is composed of parallel silicate chains.
  • Riebeckite: Mineral information, data and localities.

    www.mindat.org/min-3418.html Riebeckite is defined as a member of the riebeckite group with Fe 2+ >Mg in the C 2+ position and (OH) dominant in the W position. Colour: Usually black, also commonly light blue to blue-black, gray-blue, gray, brown
  • Riebeckite - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/chemistry/riebeckite The volcanic and sedimentary rocks hosting the uranium mineralization were first altered to albite, fluorine-rich magnesio-riebeckite, calcite, Ti–V-rich magnetite, and minor brannerite, uraninite, and dolomite in a strongly foliated rock. Then, the rocks were brecciated, further altered, and cemented by albite, riebeckite, calcite, apatite ...
  • Riebeckite - Simple English Wikipedia, the free encyclopedia

    simple.wikipedia.org/wiki/Riebeckite Riebeckite is a silicate mineral. It is found in nature as both a fibrous form and a solid form. The fibrous form, called blue asbestos or crocidolite asbestos, is one of the six types of asbestos.It is considered by many experts to be the most dangerous type of asbestos.
  • Riebeckite Mineral Data

    www.webmineral.com/data/Riebeckite.shtml Riebeckite Crystallography: Axial Ratios: a:b:c =0.5412:1:0.2956 : Cell Dimensions: a = 9.769, b = 18.048, c = 5.335, Z = 2; beta = 103.6° V = 914.24 Den(Calc)= 3.40
  • RIEBECKITE (Sodium Iron Magnesium Silicate Hydroxide)

    www.galleries.com/Riebeckite Riebeckite is a part of several solid solution series. A solid solution series is where two or more elements can substitute for each other without changing the structure of the mineral. In the case of riebeckite, there exists two such series. The easiest to explain series exists with a mineral called magnesioriebeckite.