Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Barroisite Root Name

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About Barroisite Root NameHide

Formula:
☐{CaNa}{Z2+3Z3+2}(AlSi7O22)(OH,F,Cl)2
The barroisite minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < Z(Al+Fe3++2Ti).

The individual minerals are identified on their dominant elements in the Z2+, Z3+ (= IMA C2+, C3+) and the (OH),F,Cl dominan ion. The dominant elements in these positions are normally:

Z2+ position (= IMA C2+ position): Mg or Fe dominant
Z3+ position (= IMA C3+ position): Al or Fe dominant
W position: (OH) or F dominant

On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
Name:
The amphibole barroisite was named in 1922 by Murgoci after the French geologist Charles BARROIS (1851-1939 ). Barroisite was set as an amphibole rootname by Hawthorne et al. (2012)
This page provides mineralogical data about Barroisite Root Name.


Chemical Properties of Barroisite Root NameHide

Formula:
☐{CaNa}{Z2+3Z3+2}(AlSi7O22)(OH,F,Cl)2

The barroisite minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < Z(Al+Fe3++2Ti).

The individual minerals are identified on their dominant elements in the Z2+, Z3+ (= IMA C2+, C3+) and the (OH),F,Cl dominan ion. The dominant elements in these positions are normally:

Z2+ position (= IMA C2+ position): Mg or Fe dominant
Z3+ position (= IMA C3+ position): Al or Fe dominant
W position: (OH) or F dominant

On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.

Relationship of Barroisite Root Name to other SpeciesHide

Other Members of this group:
Katophorite Root NameA(CaNa)(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Richterite Root Name{A}{CaNa}{Z5}(Si8O22)(OH,F,Cl)2Mon.
Taramite Root NameA(CaNa)(Z2+3Z3+2)(Al2Si6O22)(OH,F,Cl)2
Winchite Root Name☐{CaNa}{Z2+4Z3+}(Si8O22)(OH,F,Cl)2Mon.
Group Members:
Barroisite ☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2Mon.
Ferri-barroisite ☐(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2
Ferri-fluoro-barroisite ☐{CaNa}{Mg3Fe3+2}(AlSi7O22)F2
Ferro-barroisite ☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
Ferro-ferri-barroisite ☐(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2
Ferro-ferri-fluoro-barroisite ☐{CaNa}{Fe2+3Fe3+2}(AlSi7O22)F2
Ferro-fluoro-barroisite ☐{CaNa}{Fe2+3Al2}(AlSi7O22)F2
Fluoro-barroisite ☐{CaNa}{Mg3Al2}(AlSi7O22)F2

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 Barroisite Root NameHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Murgoci, G. (1922) Sur la classification des amphiboles bleues et de certaines hornblendes. Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences: 175: 426-429.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for Barroisite Root NameHide

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 23, 2019 18:14:38 Page generated: December 9, 2018 15:21:55
Go to top of page