Actinolita

Características generales


Datos generales


Fórmula: {Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Sistema de cristalización: Monoclínico
Lustre: Vítreo
Color: Grey green, green black, green or black
Dureza: 5-6
Rareza: común
Características distintivas: Toughness (nephrite jade), fibrosity (asbestos), typical green colour, crystal habit and hardness.
Grupo de minerales: Amphibole Group

Clasificación

Estado IMA: Válido. Descrito con antelación a 1959 (pre-IMA), se considera un mineral clásico o histórico (grandfathered)

Nickel-Strunz : 09.DE.10
  • 9: Silicatos
  • 09.D: Inosilicatos
  • 09.DE: Inosilicates with 2-periodic double chains,Si4O11- amphibole family

Dana 8th ed. : 66.1.3a.2

Etimología:

"From the Greek, aktinos, meaning ""ray"" in reference to actinolite's fibrous nature.



Formación y ambiente

Metamorphic rocks.

Magmatic (ultra-basic), metamorphic (regional/thermal), pegmatitic (granite), post magmatic, secondary

Propiedades fisicas

Hábito: Radial, massive, granular, fibrous, columnar or bladed

Lustre: Vítreo

Transparencia: Transparente, Opaco

Color: Grey green, green black, green or black

Color en sección fina: Incolora

Raya: Blanco

Dureza (Mohs): 5-6

Tenacidad: Frágil, astillosa

Exfoliación::
  • Primera exfoliación: Perfecta en [110]
  • Segunda exfoliación: Perfecta en [110]
  • Tercera exfoliación: Perfecta


Fractura: Subconcoidal - Irregular

Densidad: 3-3,1 g/cm3 (medida) | 2,52 g/cm3 (calculada)

Cristalografía

Sistema cristalino: Monoclínico

Clase (H-M): 2m (2/m) - Prismática

Grupo espacial: C2/m

Parámetros de la celda: a=9,84Å b=18,1Å c=5,28Å

Estructura del cristal: β=104,7º

Volumen de unidad de celda: V 909,61Å

Z: 2

Difracción de Rayos X:
Difracción de Rayos X
D(hkl)Intensidad
8,38100
3,12100
2,7190

Propiedades ópticas

Tipo: Biaxial (-)

Valores RI: nα= 1,613 - 1,628; nβ= 1,627 - 1,644; nγ= 1,638 - 1,655

2V: medida: 78º - 80

Máxima birrefringencia: δ = 0,027

Dispersión: Débil, r<v

Pleocroismo: Pleiocroico

X: Very pale yellow, colourless, pale brown, or light green
Y: Greenish yellow, pale yellow green, pale brown, or bluish green
Z: Pale green, green, dark green, or pale bluish green



Propiedades químicas

Fórmula: {Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2

Elementos químicos: Ca, Mg, Fe, Si, O, H

Composición química: H: 0,23%, Fe: 12,76%, Si: 25,66%, O: 43,86%, Mg: 8,33%, Ca: 9,16%,

Tests químicos

Fusibilidad: 3; Mineral tipo: Almandino; Punto de fusión: 1050ºC; Funde con mechero solo trozos pequeños
Reacción a los ácidos: Insoluble en ácidos.
Formación de sublimados: Fuses to a grey-green glass.



Relaciones con otros minerales

Miembro del grupo de minerales: Amphibole Group


Minerales pertenecientes al Amphibole Group


Minerales acompañantes
NombreImagenClase mineralógica
Actinolita9. Silicatos
09.D: Inosilicatos

{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ferro-edenita9. Silicatos
09.D: Inosilicatos

{Na}{Ca2}{Fe52+}(AlSi7O22)(OH)2
Ferro-hornblenda9. Silicatos
09.D: Inosilicatos

{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Grunerita9. Silicatos
09.D: Inosilicatos

{Fe22+}{Fe52+}(Si8O22)(OH)2
Manganocummingtonita9. Silicatos
09.D: Inosilicatos

{Mn22+}{Mg5}(Si8O22)(OH)2
TremolitaTremolita9. Silicatos
09.D: Inosilicatos

{Ca2}{Mg5}(Si8O22)(OH)2


Minerales acompañantes:

Minerales acompañantes
NombreImagenClase mineralógica
AlbitaAlbita9. Silicatos
09.F: Tectosilicatos sin ceolita H2O

Na(AlSi3O8)
CalcitaCalcita5. Carbonatos (nitratos)
05.A: Carbonatos sin aniones adicionales, sin H2O

CaCO3
EpidotaEpidota9. Silicatos
09.B: Sorosilicatos

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Glaucophane9. Silicatos
09.D: Inosilicatos

◻[Na2][Mg3Al2]Si8O22(OH)2
Lawsonita9. Silicatos
09.B: Sorosilicatos

CaAl2(Si2O7)(OH)2·H2O
MoscovitaMoscovita9. Silicatos
09.E: Filosilicatos

KAl2(AlSi3O10)(OH)2
OrtosaOrtosa9. Silicatos
09.F: Tectosilicatos sin ceolita H2O

K(AlSi3O8)
TalcoTalco9. Silicatos
09.E: Filosilicatos

Mg3(Si4O10)(OH)2




Yacimientos y localidades de interés

Localidades

  • Wallaroo mines, South Australia, Australia
  • Proprietary mine, Broken Hill, New South Wales, Australia
  • Moonta mines, South Australia, Australia
  • Boddington, Mt Saddleback, Western Australia, Australia
  • Wallaroo mines, South Australia, Australia
  • Cygnet, Tasmania, Australia
  • Mt Cleveland Mine, Luina, Tasmania, Australia
  • Boddington, Mt Saddleback, Western Australia, Australia
  • Moonta mines, South Australia, Australia
  • Proprietary mine, Broken Hill, New South Wales, Australia
  • Mt Cleveland Mine, Luina, Tasmania, Australia
  • Cygnet, Tasmania, Australia
  • Proprietary mine, Broken Hill, New South Wales, Australia
  • Moonta mines, South Australia, Australia
  • Boddington, Mt Saddleback, Western Australia, Australia
  • Cygnet, Tasmania, Australia
  • Mt Cleveland Mine, Luina, Tasmania, Australia
  • Boddington, Mt Saddleback, Western Australia, Australia
  • Moonta mines, South Australia, Australia
  • Proprietary mine, Broken Hill, New South Wales, Australia
  • Wallaroo mines, South Australia, Australia
  • Wallaroo mines, South Australia, Australia
  • Cygnet, Tasmania, Australia
  • Mt Cleveland Mine, Luina, Tasmania, Australia
  • Knappenwald, Untersulzbachtal, Salzburg, Austria
  • Schwaz-Brixlegg, Tyrol, Austria
  • Schellgaden, Salzburg, Austria
  • Schellgaden, Salzburg, Austria
  • Schwaz-Brixlegg, Tyrol, Austria
  • Knappenwald, Untersulzbachtal, Salzburg, Austria
  • Schellgaden, Salzburg, Austria
  • Schwaz-Brixlegg, Tyrol, Austria
  • Knappenwald, Untersulzbachtal, Salzburg, Austria
  • Schellgaden, Salzburg, Austria
  • Schwaz-Brixlegg, Tyrol, Austria
  • Knappenwald, Untersulzbachtal, Salzburg, Austria
  • Pedra Preta pit, Brumado mine, Sierra as Eguas, Bahia, Brazil
  • Brumado mine, Sierra as Eguas, Bahia, Brazil
  • Jeffrey pit, Asbestos, Shipton Twp., Richmond Co., Québec, Canada
  • Graphite Road Roadcut, Monteagle Township, Bancroft, Hastings Co., Ontario, Canada
  • Poudrette quarry, Mt St.-Hilaire, Rouville Co., Québec, Canada
  • York River Skarn, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
  • Francon quarry, St-Michel distr., Montreal Island, Québec, Canada
  • Bessemer Mine, Mayo Township, Bancroft, Hastings Co., Ontario, Canada
  • Evans-Lou pegmatite, near St-Pierre-de-Wakefield, Portland Twp., Papineau Co., Québec, Canada
  • Montréal, Québec, Canada
  • Mt St.-Hilaire, Rouville Co., Québec, Canada
  • Raná, Zdar nad Sazavou, Jihormoravsky, Czech Republic
  • Medenec (Kupferberg), Chomutov, Krusne Hory, Vychodocesky, Czech Republic
  • Smrcina, Sobotin, Sumperk, Maehren, Czech Republic
  • Great Retallack mine, Perranzabuloe, Cornwall, England
  • Delabole Slate quarry, Tintagel, Cornwall, England
  • Belstone Consols, Devon, England
  • Bowder Stone, Borrowdale, Cumbria, England
  • Shap Blue Quarry, Shap, Cumbria, England
  • Sinen Gill, Cumbria, England
  • Haytor mine, Ilsington, Dartmoor, Devon, England
  • Honister Slate Quarry, Honister Pass, Cumbria, England
  • Carrick Du quarry, St. Ives, Cornwall, England
  • Dolcoath mine, Camborne, Illogan, Cornwall, England
  • Thurstaston Beach, Wirral, Merseyside, England
  • Wheal Maudlin, Lanlivery, Cornwall, England
  • Wallow Crag Quarry, Haweswater, Cumbria, England
  • New Aplite Quarry, Meldon, Okehampton, Devon, England
  • Clicker Tor quarry, Menheniot, Cornwall, England
  • Erzgebirge, Thüringen, Germany
  • Bärensteinbruch quarry, Radautal, Bad Harzburg, Harz Mts, Sachsen, Germany
  • Daniel mine, Schneeberg, Sachsen, Germany
  • St. Andreasberg, Hartz Mts, Niedersachsen, Germany
  • Fiskenaesset, Nuuk, Greenland
  • Fiskenaesset, Greenland
  • Co. Donegal, Ireland
  • Val Malenco, Valtellina, Sondrio, Lombardia, Italy
  • Sondrio, Italy
  • Batopilas district, Chihuahua, Mexico
  • Kombat mine, Tsumeb, Otavi, Namibia
  • Selasvann, Aust-Agder, Norway
  • Vegaardshei, Aust-Agder, Norway
  • Kongsberg, Buskerud, Norway
  • Alchuri, Shigar Valley, Skardu Road, Gilgat, Pakistan
  • Puiva, Saranpual, Polar Urals, Russia
  • Polar Urals, Tyumen Oblast, Russia
  • Dal'negorsk, Primorskiy Kray, Russia
  • Aldan Shield, Yakutiya, Siberia, Russia
  • Dodo mine, Polar Urals, Tyumen Oblast, Russia
  • Scourie, Sutherland, Scotland
  • Coire Buidhe, Glen Creran, Argyll & Bute, Scotland
  • Isle Ornsay, Isle of Skye, Scotland
  • Graubünden, Switzerland
  • Coarse Gold, Madera, California, USA
  • Conklin quarry, Lincoln, Providence Co., Rhode Island, USA
  • Copper Hill Area mines, Ducktown, Polk Co., Tennessee, USA
  • Copper King Mine, Red Feathers Lake Area, Larimer Co., Colorado, USA
  • Copper Queen Mine, Bisbee, Cochise Co., Arizona, USA
  • Cornwall, Lebanon Co., Pennsylvania, USA
  • Corundum Hill Area, Franklin (Mason Mountain), Macon Co., North Carolina, USA
  • Coventry Area, Kent Co., Rhode Island, USA
  • Cranston Graphite mine, Cranston, Providence Co., Rhode Island, USA
  • Dexter quarry, Lincoln, Providence Co., Rhode Island, USA
  • Carson Hill/New Melones Lake, Calaveras Co., California, USA
  • Eagle Mountain Mine Area, Riverside Co., California, USA
  • Christmas Mine, Hayden, Gila Co., Arizona, USA
  • Diamond Hill/Sneech Pond Copper Mines, Cumberland, Rhode Island, USA
  • Goose Creek Quarry, Loudoun Co., Virginia, USA
  • Shelby, Cleveland Co., North Carolina, USA
  • Sneech Pond Copper mine, Cumberland, Providence Co., Rhode Island, USA
  • Snow/Sackett/Marcia/Old/Melvin/Wright Mines etc, Chester, Hampden Co., Massachusetts, USA
  • Spruce Pine, Mitchell Co., North Carolina, USA
  • Staples Road Manganese bed, Cumberland, Providence Co., Rhode Island, USA
  • Tilcon Capaldi quarry, Acushnet, Bristol Co., Massachusetts, USA
  • Unnammed Quartz propspects, Chester, Hampden Co., Massachusetts, USA
  • Webster, Jackson Co., North Carolina, USA
  • Willow Creek Area, Pecos, San Miguel Co., New Mexico, USA
  • Reading Talc Mine, Reading, Windsor Co., Vermont, USA
  • Surl, Person Co., North Carolina, USA
  • Sedalia Copper Mine, Sedalia, Chaffee Co., Colorado, USA
  • Ecton Mine etc, Perkiomenville Area, Montgomery Co., Pennsylvania, USA
  • Beacon Pole Hill/Iron Mine Hill/Diamond Hill etc, Cumberland Area, Providence Co., Rhode Island, USA
  • Bell Pit, Newry, Oxford Co., Maine, USA
  • Bershire Talc Company mines, Hinsdale, Berkshire Co., Massachusetts, USA
  • Betts Manganese Mine, Plainfield, Hampshire Co., Massachusetts, USA
  • Bisbee, Cochise Co., Arizona, USA
  • Blue Mountain, Virginia, USA
  • Calumet Iron Mine, Salida, Chaffee Co., Colorado, USA
  • Calumet Mine, Turret District, Chaffee Co., Colorado, USA
  • Carlton mine, Chester, Windham Co., Vermont, USA
  • Carlton Talc Quarry, Chester, Windsor Co., Vermont, USA
  • Goodall/Webster, Sanford, York Co., Maine, USA
  • Chester Emery mine, Chester, Hampden Co., Massachusetts, USA
  • Bare Hills, Baltimore, Baltimore Co., Maryland, USA
  • Chester, Vermont, USA
  • El Portal Area, Mariposa Co., California, USA
  • Erin, Clay Co., Alabama, USA
  • Fairfax Quarry, Centreville, Fairfax Co., Virginia, USA
  • Fenners Ledge, Cranston, Providence Co., Rhode Island, USA
  • Foote Spodumene Mine, Kings Mountain, Cleveland Co., North Carolina, USA
  • French Creek Mines, Knauertown, Chester Co., Pennsylvania, USA
  • General Area, Franklin, Sussex Co., New Jersey, USA
  • Davis Soapstone Quarry, Saxons River, Windsor Co., Vermont, USA
  • Bayer-Mingolla Quarry, Ashland, Norfolk Co., Massachusetts, USA
  • Area mines, Brindletown, Burke Co., North Carolina, USA
  • Area mines, Flat Rock, Mitchell Co., North Carolina, USA
  • Asbestos Mine, Pelham, Hampshire Co., Massachusetts, USA
  • Romur tungsten area, Fremont Co., Wyoming, USA
  • Ochee Springs, Providence Co., Rhode Island, USA
  • Oxford Granite quarry, Oxford, Oxford Co., Maine, USA
  • Oxford Stone Company, Bridgeville, Cumberland Co., New Jersey, USA
  • Penn mines, Carbon Co., Wyoming, USA
  • Pine Creek Mine, Bishop, Inyo Co., California, USA
  • Pipestone Pass Area, Bald Mts. Area, Jefferson Co., Montana, USA
  • Pitts-Tenney mine, Minot, Androscoggin Co., Maine, USA
  • Poker Hill, Ashton, Cumberland, Providence Co., Rhode Island, USA
  • Providence, Providence Co., Rhode Island, USA
  • New Idria serpentine, Coalinga, Fresno Co., California, USA
  • Iron Mountain Mine, Iron Mountain, Missouri, USA
  • Grace Mine, Morgantown, Berks Co., Pennsylvania, USA
  • Osborne Soapstone quarry, Blandford, Hampden Co., Massachusetts, USA
  • Ore Knob Copper Mine, Ashe, Ashe Co., North Carolina, USA
  • Lynch quarry, Berkeley, Cumberland, Providence Co., Rhode Island, USA
  • Manton Avenue quarry, Providence, Providence Co., Rhode Island, USA
  • Manton, Providence Co., Rhode Island, USA
  • Manville quarry, Cumberland, Providence Co., Rhode Island, USA
  • Massachusetts Talc Company mine, Rowe, Franklin Co., Massachusetts, USA
  • McLear Quarry, DeKalk Township, St.Lawrence Co., New York, USA
  • Menominee Range, Dickinson & Iron Co., Michigan, USA
  • Middletown, Newport Co., Rhode Island, USA
  • Morgantown, Burke Co., North Carolina, USA
  • New Cornelia Mine, Ajo, Pima Co., Arizona, USA
  • Magdalena district, Socorro Co., New Mexico, USA
  • North Mountain Serpentine locality, Cheshire, Berkshire Co., Massachusetts, USA
  • Gray Thorne, Graham Co., Arizona, USA
  • Great Western Mine, Middletown, Napa Co., California, USA
  • Keystone Quarry, Cornog, Chester Co., Pennsylvania, USA
  • Laytonville Quarry, Laytonville, Mendocino Co., California, USA
  • Lime Quarry, Bolton, Worcester Co., Massachusetts, USA
  • Lincoln, Providence Co., Rhode Island, USA
  • local Quarries, Haddam, Middlesex Co., Connecticut, USA
  • Luning, Mineral Co., Nevada, USA
  • Hunting Hill quarry, Rockville, Montgomery Co., Maryland, USA
  • Pulga deposit, North Fork, Feather river, Butte Co., California, USA
  • Tilly Foster Mine, Brewster, Putnam Co., New York, USA
  • General, Mesabi Iron Range, Itasca & St.Louis Co., Minnesota, USA
  • Rich Mts. Area, Watauga Co., North Carolina, USA
  • Jumbo Copper mine, Prince of Wales Island, Alaska, USA
  • Johnston, Providence, Rhode Island, USA
  • Jensen Quarry, Riverside Co., California, USA
  • Green Mountain Mine, Prince of Wales Island, Alaska, USA
  • Hanover, Grant Co., New Mexico, USA
  • Hawthorne, Mineral Co., Nevada, USA
  • Highland Commercial Drive, Cumberland, Providence Co., Rhode Island, USA
  • Hill Top Mine, Cochise Co., Arizona, USA
  • Hilltop mine, Cochise Co., Arizona, USA
  • Horseshoe Island Calc-Silicate locality, Winthrop, Kennebec Co., Maine, USA
  • Mahopac Iron Mine, Brewster, Putnam Co., New York, USA
  • Iron Mine Hill quarry, Cumberland, Providence Co., Rhode Island, USA
  • Rians Quarry, Felch, Dickinson Co., Michigan, USA
  • Italian Mt. Area, Aspen, Gunnison Co., Colorado, USA
  • Rockport, Cape Ann, Essex Co., Massachusetts, USA


Bibliografía y más información

American Mineralogist, vol. 63, p.1023-1052, (1978)

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