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Ferro-fluoro-richterite

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Formula:
{Na}{CaNa}{Fe2+5}(Si8O22)F2
The richterite group minerals are defined as sodium-calcium amphiboles with 0,5 apfu < A(Na+K+ 2Ca) where Na or K is dominant, and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH),F or Cl.

Ferro-fluoro-richterite is defined with
A position: Na dominant
C position: Fe2+ dominant
W position: F dominant.
This page provides mineralogical data about Ferro-fluoro-richterite.


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Classification of Ferro-fluoro-richteriteHide

Notes:
Intermediate member of a solid-solution series

Chemical Properties of Ferro-fluoro-richteriteHide

Formula:
{Na}{CaNa}{Fe2+5}(Si8O22)F2

The richterite group minerals are defined as sodium-calcium amphiboles with 0,5 apfu < A(Na+K+ 2Ca) where Na or K is dominant, and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH),F or Cl.

Ferro-fluoro-richterite is defined with
A position: Na dominant
C position: Fe2+ dominant
W position: F dominant.

Relationship of Ferro-fluoro-richterite to other SpeciesHide

Other Members of this group:
Ferro-richterite{Na}{CaNa}{Fe2+5}(Si8O22)(OH)2Mon.
Fluoro-richterite{Na}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon. 2/m
Potassic-ferro-richterite{K}{CaNa}{Fe2+5}Si8O22(OH)2
Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon.
Potassic-richterite{K}{CaNa}{Mg5}Si8O22(OH)2Mon. 2/m : B2/m
Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ferro-fluoro-richteriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

Internet Links for Ferro-fluoro-richteriteHide

 
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