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Actinolite-Tremolite Series

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Series Formula:
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2 to ☐{Ca2}{Mg5}(Si8O22)(OH)2
A series between Actinolite and Tremolite

Tremolite is defined as having an Mg/(Mg+Fe2+) ratio ≥ 0.9; actinolite has a ratio of 0.5–0.9 and ferro-actinolite has a ratio of less than 0.5.

Classification of Actinolite-Tremolite Series URL:
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Crystallography of Actinolite-Tremolite Series

Crystal System:

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.

Internet Links for Actinolite-Tremolite Series

Localities for Actinolite-Tremolite Series

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Ontario
    • Haliburton Co.
      • Cardiff Township
Anne P. Sabina (1986) Rocks and Minerals for the Collector, Bancroft-Parry Sound and South Eastern Ontario
      • Lutterworth Township
Canadian Museum of Nature data
      • Monmouth Township
Van King
  • Valparaíso Region
    • Petorca Province
Maksaev, V., Townley, B., Palacios, C., and Camus, F. (2007): Metallic ore deposits. In: Moreno, T., and Gibbons, W. (editors): The Geology of Chile. The Geological Society (London), pp. 414.
  • Rhône-Alpes
    • Savoie
      • La Lauzière massif
DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
  • Saxony-Anhalt
    • Harz
      • Thale
        • Friedrichsbrunn
Thomas Lühr
  • Tuscany
    • Florence Province
      • Firenzuola
        • Monte Beni
Bardi, T., Becucci, A. & Biagioni, C. (2012): Monte Beni - I minerali dell'ex cava Fantoni (Pietramala, Firenzuola, Firenze). MICRO, 3/2012, 98-109.
    • Lucca Province
      • Garfagnana
        • San Romano Garfagnana
Biagioni, C. (2009). Minerali della Provincia di Lucca. Associazione Micro-Mineralogica Italiana, Cremona, 352 pp.
  • Buskerud
    • Kongsberg
Van der Wel, D. (1972): Contribution to the Mineralogy of Norway No. 51. Asbestos minerals from Kongsberg silver deposit. Norsk Geologisk Tidsskrift 52: 287-294
        • Overberget Mining Field
Nordrum, F.S.(1999): Nyfunn av mineraler i Norge 1998-1999. Bergverksmuseets Skrift 15: 87-90
  • Västmanland
    • Ljusnarsberg
      • Uvberget
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (p. 197-198)
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (p. 197-198)
  • Wallis (Valais)
    • Binn Valley
"Amir Akhavan" collection
  • California
    • Santa Cruz Co.
      • Santa Cruz Mts
        • Ben Lomond Mountain
          • Ben Lomond Mountain area
Leo, G.W. (1967) The plutonic and metamorphic rocks of the Ben Lomond Mountain area, Santa Cruz County, California. California Division of Mines and Geology Special Report 91: 41; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 399.
  • Massachusetts
    • Middlesex Co.
P. Cristofono collection
P. Cristofono collection
  • Oregon
    • Coos Co.
      • Bandon
Alt, D., and Hyndman, D., 1978, Roadside Geology of Oregon: Missoula, Mountain Press, p. 97-98.
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