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:
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

Hornblende Root Name

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

About Hornblende Root NameHide

Crystal System:
The hornblende root name is in a mineralogical sense as amphiboles in the calcium amphibole subgroup with A(Na+K+2Ca)≤0,5 apfu and 0,5≤Z(Al + Fe3+ +2Ti)≤1,5 apfu. The individual members of the group are defined by it's dominant elements in the Z and W positions

Z2+ position (= IMA C2+ position): Mg or Fe2+
Z3+ position (= IMA C3+ position): Al or Fe3+
W position: (OH) or F

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.

The hornblende root name is an IMA-CNMNC defined amphibole root-name with strict chemical boundaries. it should not be confused with the more loosely defined "hornblende", which is a term used by petrologists and mineral collectors for any black undefined amphibole in the calcium ( and sometimes in the sodium-calcium) subgroups.

Chemical Properties of Hornblende Root NameHide


Crystallography of Hornblende Root NameHide

Crystal System:

Relationship of Hornblende Root Name to other SpeciesHide

Other Members of this group:
Cannilloite Root NameCa(Ca2)(Z2+4Z3+))(Al3Si5O22)(OH,F,Cl)2
Edenite Root NameA(Ca2)Z5(AlSi7O22)((OH,F,Cl)2Mon.
Hastingsite Root Name(A)(Ca2){Z2+4 Fe3+)(Al2Si6O22)(OH,F,Cl)2
Pargasite Root Name(A)(Ca2){Z2+4 Al)(Al2Si6O22)(OH,F,Cl)2
Sadanagaite Root NameA (Ca2)(Z2+3Z3+2)(Si5Al3O22)(OH,F,Cl)2Mon.
Tremolite-Actinolite Series☐{Ca2}{Z5}(Si8O22)(OH,F,Cl)2
Tschermakite Root Name☐(Ca2)(Z2+3Z3+2}(Al2Si6O22)(OH,F,Cl)2
Group Members:
Ferro-ferri-fluoro-hornblende ☐{Ca2}{Fe2+4Fe3+}(AlSi7O22)F2
Ferro-ferri-hornblende ☐Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2Mon. 2/m : B2/m
Ferro-fluoro-hornblende ☐Ca2(Fe2+4Al)(AlSi7O22)F2
Ferro-hornblende ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2Mon.
Magnesio-ferri-fluoro-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)F2Mon. 2/m : B2/m
Magnesio-ferri-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)(OH)2Mon. 2/m : B2/m
Magnesio-fluoro-hornblende (Na,K)1-xCa2Mg5(Si7Al)O22F2
Magnesio-hornblende ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2Mon.
Chemically related to group(s):
Tschermakite Root Name☐(Ca2)(Z2+3Z3+2}(Al2Si6O22)(OH,F,Cl)2

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 Hornblende Root NameHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 Hornblende 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: March 24, 2019 06:59:09 Page generated: March 20, 2019 13:41:38
Go to top of page