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ferro-actinolite
Sign in to saveFerro-actinolite is the ferrous iron-rich endmember of the actinolite-tremolite continuous solid solution series of the double chain calcareous amphibole group of inosilicate minerals. All the series members belong to the monoclinic crystal system.
Wikidata facts
- Named after
- iron(II)
Show 8 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 9.DE.10
- Mohs' hardness
- 5.5
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.DE.10
- solid solution series with
- tremolite
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Fact
- chemical formula
- ☐Ca₂Fe²⁺₅Si₈O₂₂(OH)₂
- Strunz 8th edition (series ID, updated)
- VIII/D.05b
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Encyclopedic overview
2 sectionsContents
- Physical properties
- References
Ferro-actinolite is the ferrous iron-rich endmember of the actinolite-tremolite continuous solid solution series of the double chain calcareous amphibole group of inosilicate minerals. All the series members belong to the monoclinic crystal system.
The following formula comparison indicates the position of individual well-known members within the series: tremolite: ☐Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2 actinolite: ☐Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2 ferro-actinolite: ☐Ca2(Mg2.5-0.0Fe2+2.5-5.0)Si8O22(OH)2
Excerpted from Wikipedia’s “ferro-actinolite” article, available under the CC BY-SA 4.0 licence.