IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
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 Educators
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
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Potassic-ferro-taramite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
K{CaNa}{Fe2+3Al2}{Si6Al2}O22(OH)2
The taramite group minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 1.5 apfu < C(Al+Fe3++2Ti).

Potassic-ferro-taramite is defined with

A position: K dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: (OH) dominant
Colour:
Dark bluish-green
Lustre:
Vitreous
Hardness:
5 - 6
Crystal System:
Monoclinic
Name:
Named for the group type locality, Walitarama, Mariupol, Ukraine.

This mineral was originally named potassic-aluminotaramite. Due to the redefinition of the taramite group in the 2012 amphibole nomenclature, the valid name for this material is potassic-ferro-taramite.
The taramite group is in the 2012 nomenclature defined with C(Al+Fe3++2Ti)>1,5 apfu, whereas the pre-2012 definition was used the T position, i.e 5,5 < Si < 6,5 apfu. This redefinition does not change the formula, but some amphiboles qualifying as potassic-ferro-taramite pre-2012 may now be potassic-ferro-katophorite.


Hide all sections | Show all sections

Classification of Potassic-ferro-taramiteHide

Approved
Approval Year:
2007

Physical Properties of Potassic-ferro-taramiteHide

Vitreous
Colour:
Dark bluish-green
Streak:
White
Hardness:
5 - 6 on Mohs scale
Cleavage:
Perfect
{110} Perfect

Chemical Properties of Potassic-ferro-taramiteHide

Formula:
K{CaNa}{Fe2+3Al2}{Si6Al2}O22(OH)2

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

Potassic-ferro-taramite is defined with

A position: K dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: (OH) dominant
IMA Formula:
K(NaCa)(Fe2+3Al2)(Si6Al2)O22(OH)2

Crystallography of Potassic-ferro-taramiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 9.8505 Å, b = 18.0075 Å, c = 5.3518 Å
β = 104.775°
Ratio:
a:b:c = 0.547 : 1 : 0.297
Unit Cell V:
917.93 ų (Calculated from Unit Cell)
Morphology:
Prismatic

Type Occurrence of Potassic-ferro-taramiteHide

Geological Setting of Type Material:
meta-monzonite
Associated Minerals at Type Locality:

Synonyms of Potassic-ferro-taramiteHide

Other Language Names for Potassic-ferro-taramiteHide

Relationship of Potassic-ferro-taramite to other SpeciesHide

Other Members of this group:
Ferri-fluoro-taramiteNa(CaNa)(Mg3Fe3+2)(Al2Si6O22)F2
Ferri-taramiteNa(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon.
Ferro-ferri-fluoro-taramiteNa(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)F2
Ferro-ferri-taramiteNa(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2
Ferro-fluoro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)F2
Ferro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
Fluoro-taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2Mon. 2/m : B2/m
Potassic-ferri-taramiteK(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)
Potassic-ferro-ferri-taramiteK(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2Mon. 2/m
Taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)(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 Potassic-ferro-taramiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Obertii, R., Boiocchi, M., Smith, D.C., Mendenbach, O., Helmers H. (2008) Potassic-aluminotaramite from Sierra de los Filabres, Spain. European Journal of Mineralogy: 20: 1005–1010.
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 Potassic-ferro-taramiteHide

Localities for Potassic-ferro-taramiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Spain (TL)
 
  • Andalusia
    • Almería
Obertii, R., Boiocchi, M., Smith, D.C. Mendenbach, O. & Helmers H. (2008): Potassic-aluminotaramite from Sierra de los Filabres, Spain. European Journal of Mineralogy. 20: 1005–1010
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, 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: October 24, 2018 00:19:11 Page generated: September 10, 2018 20:30:19
Go to top of page