Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice 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.
Formula:
☐(Ca2)(Z42+Z3+}(AlSi7O22)(OH,F,Cl)2
System:
Monoclinic
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.

Classification of Hornblende Root Name

Approved 2012
mindat.org URL:
http://www.mindat.org/min-8789.html
Please feel free to link to this page.

Crystallography of Hornblende Root Name

Crystal System:
Monoclinic

Chemical Properties of Hornblende Root Name

Formula:
☐(Ca2)(Z42+Z3+}(AlSi7O22)(OH,F,Cl)2

Relationship of Hornblende Root Name to other Species

Other Members of Group:
Cannilloite Root NameCa(Ca2)(Z42+Z3+))(Al3Si5O22)(OH,F,Cl)2
Edenite Root NameA(Ca2)Z5(AlSi7O22)((OH,F,Cl)2
Hastingsite Root Name(A)(Ca2){Z42+ Fe3+)(Al2Si6O22)(OH,F,Cl)2
Joesmithite{Pb}{Ca2}{Mg3Fe23+}(Be2Si6O22)(OH)2
Pargasite Root Name(A)(Ca2){Z42+ Al)(Al2Si6O22)(OH,F,Cl)2
Sadanagaite Root NameA (Ca2)(Z32+Z23+)(Al3Si5O22)(OH,F,Cl)2
Tremolite-actinolite series☐{Ca2}{Z5}(Si8O22)(OH,F,Cl)2
Tschermakite Root Name☐(Ca2)(Z32+Z23+}(Al2Si6O22)(OH,F,Cl)2
Group Members:
Ferro-ferri-fluoro-hornblende ☐{Ca2}{Fe42+Fe3+}(AlSi7O22)F2
Ferro-ferri-hornblende ☐{Ca2}{Fe42+Fe3+}(AlSi7O22)(OH)2
Ferro-fluoro-hornblende ☐{Ca2}{Fe42+Al}(AlSi7O22)F2
Ferro-hornblende ☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Magnesio-ferri-fluoro-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)F2
Magnesio-ferri-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)(OH)2
Magnesio-fluoro-hornblende (Na,K)1-xCa2Mg5(Si7Al)O22F2
Magnesio-hornblende ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Chemically related to group(s):
Tschermakite Root Name☐(Ca2)(Z32+Z23+}(Al2Si6O22)(OH,F,Cl)2

Other Information

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 Name

Reference List:
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 Hornblende Root Name

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 1993-2015, 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: May 28, 2015 09:20:37 Page generated: May 27, 2015 15:07:44