• Volcan d'Islande
  • Améthyste
  • Orgue basaltique

Actinote (or actinolite)

Calcium amphibole group - double chain inosilicates

Formule chimique : Ca(Mg,Fe)5Si8O22(OH)2.
Système cristallin : Monoclinic
Etymologie : From the Greek actinos which means "ray" in relation to its fibrous habitus.
Dureté : 5 – 6
Densité : 3.05
Propriétés physiques :
Propriétés chimiques : Poorly soluble in hydrochloric acid (HCl).
Formule chimique : Ca(Mg,Fe)5Si8O22(OH)2.
Habitus : Actinote crystals often occur as acicular or fibrous clusters (asbestos).
Gîtologie :
Determination : Difficult
Utilisation : none

Actinote (or actinolite) belongs to the group of calcic amphiboles and forms a continuous series with tremolite and ferro-actinote.
Worldwide, the most beautiful actinote crystals come from Madagascar, Finland, USA (New York State) and Tanzania.

In France, actinote is found in the Alps (Oisans, Isère).

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