Ferrohornblenda

Características generales


Datos generales


Fórmula: Ca2(Fe2+,Mg)4Al(Si7Al)O22(OH,F)2
Sistema de cristalización: Monoclínico
Lustre: Vítreo - perlado
Color: Greenish brown, green, brown or black
Dureza: 5-6
Rareza: común

Clasificación

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.5




Formación y ambiente

Extrusive, igneous, intrusive, metamorphic

Propiedades fisicas

Hábito: Massive - granular, massive - fibrous, fibrous or columnar

Lustre: Vítreo - perlado

Transparencia: Translúcido, Opaco

Color: Greenish brown, green, brown or black

Color en sección fina: Incolora

Raya: Blanco

Dureza (Mohs): 5-6

Tenacidad: Frágil

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


Fractura: Subconcoidal

Densidad: 3-3,5 g/cm3 (medida) | 3,42 g/cm3 (calculada)

Cristalografía

Sistema cristalino: Monoclínico

Clase (H-M): 2m (2/m) - Prismática

Grupo espacial: C2/m

Parámetros de la celda: a=9,96Å b=18,19Å c=5,32Å

Estructura del cristal: β=104,87º

Volumen de unidad de celda: V 931,56Å

Z: 2

Difracción de Rayos X:
Difracción de Rayos X
D(hkl)Intensidad
8,52100
3,15990
2,72875

Propiedades ópticas

Tipo: Biaxial (-)

Valores RI: nα= 1,687 - 1,694; nβ= 1,7 - 1,707; nγ= 1,701 - 1,712

2V: medida: -30º - 10

Máxima birrefringencia: δ = 0,018

Dispersión: Weak to strong, r>v

Pleocroismo: Pleiocroico

X: Deep brown or pale greenish brown
Y: Straw yellow or dark greenish brown
Z: Yellow or bluish green



Propiedades químicas

Fórmula: Ca2(Fe2+,Mg)4Al(Si7Al)O22(OH,F)2

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

Composición química: H: 0,21%, Si: 20,75%, Fe: 25,05%, Al: 4,98%, O: 40,53%, Ca: 8,46%,

Tests químicos

Fusibilidad: 3; Mineral tipo: Almandino; Punto de fusión: 1050ºC; Funde con mechero solo trozos pequeños
Reacción a los ácidos: Insoluble en ácidos.





Yacimientos y localidades de interés

Localidades

  • Barkevik, Norway - Localidad tipo.
  • Evans-Lou pegmatite, near St-Pierre-de-Wakefield, Portland Twp., Papineau Co., Québec, Canada
  • Turner's Island Mine, Lake Clear, Renfrew Co., Ontario, Canada
  • Silver Crater mine, Faraday Township, Bancroft, Hastings Co., Ontario, Canada
  • Rose Quartz Pit, Lyndoch Township, Quadeville, Renfrew Co., Ontario, Canada
  • Meany Mine, Lake Clear, Renfrew Co., Ontario, Canada
  • Smart Mine, Lake Clear, Renfrew Co., Ontario, Canada
  • Unnamed quarry, Carlow Township, Bancroft, Hastings Co., Ontario, Canada
  • York River Skarn, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
  • Woodcox Mine, Bancroft, Monteagle Township, Hastings Co., Ontario, Canada
  • Watson Mine, Monteagle Township, Bancroft, Hastings Co., Ontario, Canada
  • MacDonald mine, Monteagle Township, Bancroft, Hastings Co., Ontario, Canada
  • Lake Clear - Kuehl Lake area, Renfrew Co., Ontario, Canada
  • Craigmont Mine, Raglan twp, Renfrew Co., Ontario, Canada
  • Burgess Mine, Carlow Township, Bancroft, Hastings Co., Ontario, Canada
  • Bessemer Mine, Mayo Township, Bancroft, Hastings Co., Ontario, Canada
  • Bear Lake Road, near Tory Hill, Ontario, Canada
  • Vlastejovice, Kutna Hora, Stredocesky, Czech Republic
  • Medenec (Kupferberg), Chomutov, Krusne Hory, Vychodocesky, Czech Republic
  • Libodrice, Kutna Hora, Stredocesky, Czech Republic
  • Burtness Wood, Buttermere, Cumbria, England
  • Porthoustock quarry, St. Keverne, Cornwall, England
  • Red a Venn mine, Okehampton, Devon, England
  • Shap Blue Quarry, Shap, Cumbria, England
  • Botallack mine, Botallack, St. Just, Cornwall, England
  • Bowder Stone, Borrowdale, Cumbria, England
  • Bowness Knott, Ennerdale, Cumbria, England
  • Penberthy Croft mine, St. Hilary, Cornwall, England
  • South Terras mine, St. Stephen-in-Brannel, Cornwall, England
  • Mullion, The Lizard, Cornwall, England
  • Great Retallack mine, Perranzabuloe, Cornwall, England
  • Housel Bay, The Lizard, Cornwall, England
  • Cadgwith, The Lizard, Cornwall, England
  • Mecklin Wood, Wasdale, Cumbria, England
  • Dean quarry, St. Keverne, Cornwall, England
  • Thurstaston Beach, Wirral, Merseyside, England
  • Meldon BR Quarry, Okehampton, Devon, England
  • Landewednack, The Lizard, Cornwall, England
  • Pflasterkaute quarry, Eisenach, Thüringen, Germany
  • Bärensteinbruch quarry, Radautal, Bad Harzburg, Harz Mts, Sachsen, Germany
  • Artenberg quarry, Kinzigtal, Baden-Wuerttemberg, Germany
  • Ivigtut, Arsuk Fjord, Greenland
  • Val Graveglia, Liguria, Italy
  • Mount Vesuvius, Naples, Campania, Italy
  • Evje-Ivedal, Iveland, Aust-Agder, Norway
  • Kongsberg, Buskerud, Norway
  • Kragero, Telemark, Norway
  • Barkevik, Langesundfjord, Telemark, Norway
  • Eg, Kristiansand, Vest-Agder, Norway
  • Buö, Arendal, Froland, Aust-Agder, Norway
  • Snarum, Vikersund, Buskerud, Norway
  • Natural Bridge, Jefferson Co., New York, USA
  • Aldan Shield, Yakutiya, Siberia, Russia
  • Glenbuchat, Aberdeenshire, Scotland
  • Ribigill Quarry, Tongue, Sutherland, Scotland
  • Marsco, Sligachan, Isle of Skye, Scotland
  • Marble Quarries (granite), Torrin, Isle of Skye, Scotland
  • Lugar, Ayrshire, Scotland
  • Eas a Bradain, Luib, Isle of Skye, Scotland
  • Ardara, Co.Donegal, Scotland
  • Arvigo, Val Calanca, Graubünden, Switzerland
  • Edenville, Orange Co., New York, USA
  • Indian Lake, Essexty, New York, USA
  • Davis pyrite mine, Rowe, Franklin Co., Massachusetts, USA
  • Iron Springs District, Cedar City Area, Utah, USA
  • Crystal Pass, Ray, Pinal Co., Arizona, USA
  • Crystal Park, Manitou Springs-Pikes Peak Area, El Paso Co., Colorado, USA
  • Crestmore Quarry, Crestmore, Riverside Co., California, USA
  • Coventry Area, Kent Co., Rhode Island, USA
  • Cotopaxi feldspar mine (Henry pegmatite), Cotopaxi district, Fremont Co., Colorado, USA
  • Foote Spodumene Mine, Kings Mountain, Cleveland Co., North Carolina, USA
  • Forge Hill iron mines, West Hawley, Franklin Co., Massachusetts, USA
  • Stafford Court House, Virginia, USA
  • Spor Mt., Nevada, USA
  • Snowbird/Mary Ellen Mine, Atlantic City District, Fremont Co., Wyoming, USA
  • Culbreath Mine, Saluda, Saluda Co., South Carolina, USA
  • Old Guard Mine, Tombstone, Cochise Co., Arizona, USA
  • General, Mesabi Iron Range, Itasca & St.Louis Co., Minnesota, USA
  • Gabbs District, Nye Co., Nevada, USA
  • French Creek Mines, Knauertown, Chester Co., Pennsylvania, USA
  • Franconia Iron mine, Sugar Hill, Grafton Co., New Hampshire, USA
  • Copper Queen Mine, Bisbee, Cochise Co., Arizona, USA
  • Conklin quarry, Lincoln, Providence Co., Rhode Island, USA
  • Colby Farm Lime-Marble quarry, Phippsburg, Sagadahoc Co., Maine, USA
  • Massachusetts Talc Company mine, Rowe, Franklin Co., Massachusetts, USA
  • Magnet Cove, Hot Spring Co., Arkansas, USA
  • Lovejoy Gravel pits, Albany, Carroll Co., New Hampshire, USA
  • Lovejay Gravel Pit, North Cornay, Carroll Co., New Hampshire, USA
  • Little Compton, Newport, Rhode Island, USA
  • Liberty Bell and Washington Pass, Okanogan Co., Washington, USA
  • Lake Valhalla, Montville, Morris Co., New Jersey, USA
  • Jensen Quarry, Riverside Co., California, USA
  • Harriman prospect, Union, Knox Co., Maine, USA
  • Middletown, Newport Co., Rhode Island, USA
  • Miller adit, Lyman, Grafton Co., New Hampshire, USA
  • Chino ore body, Central Mining District, Grant Co., Nevada, USA
  • Cheyenne Area, Iron Mountain, Wyoming, USA
  • Devils Hole mine, Devils Hole pegmatite, Texas Creek area, Fremont Co., Colorado, USA
  • Mahopac Iron Mine, Brewster, Putnam Co., New York, USA
  • New Cornelia Mine, Ajo, Pima Co., Arizona, USA
  • Mt Belvidere mines, Lowell & Eden Mills, Orleans Co., Vermont, USA
  • Morristown Area, Maricopa Co., Arizona, USA
  • Mineral, Mineral Co., Virginia, USA
  • McManus Gulch, Clear Creek Co., Colorado, USA
  • Stanislaus Mine, Carson Hill Area, Calaveras Co., California, USA
  • Callahan mine, Brooksville, Hancock Co., Maine, USA
  • Chester Emery mine, Chester, Hampden Co., Massachusetts, USA
  • Benson Mines, Newton Falls/Star Lake, St.Lawrence Co., New York, USA
  • Ben Franklin Mine, West Pikeland Township/Oppermans Corner, Chester Co., Pennsylvania, USA
  • Beacon Pole Hill/Iron Mine Hill/Diamond Hill etc, Cumberland Area, Providence Co., Rhode Island, USA
  • Bayer-Mingolla Quarry, Ashland, Norfolk Co., Massachusetts, USA
  • Bald Head Cliff locality, York, York Co., Maine, USA
  • Asbestos Mine, Pelham, Hampshire Co., Massachusetts, USA
  • Black Mountain mica Mine, Rumford Township, Oxford Co., Maine, USA
  • Bigger Pegmatite/Malachite Mines, Morrison, Jefferson Co., Colorado, USA
  • Blue Berry Mt., Woburn, Middlesex Co., Massachusetts, USA
  • Betts Manganese Mine, Plainfield, Hampshire Co., Massachusetts, USA
  • Bull Hill nepheline-syenite deposit, Crook Co., Wyoming, USA
  • Bristol, Bristol Co., Rhode Island, USA
  • Central York Mts., West Seward Peninsula, Alaska, USA
  • Catherine Mt. Molybdenite prospect, T10 SD, Hancock Co., Maine, USA
  • Carlton Talc Quarry, Chester, Windsor Co., Vermont, USA
  • Amity, Orange Co., New York, USA
  • Adams Hill, South Newfane, Windham Co., Vermont, USA
  • 79 Mine, Banner District, Gila Co., Arizona, USA
  • Prospect Mt., Litchfield, Litchfield Co., Connecticut, USA
  • Ochee Springs, Providence Co., Rhode Island, USA
  • Scrub Oaks Mine, Dover, Morris Co., New Jersey, USA
  • Osborne Soapstone quarry, Blandford, Hampden Co., Massachusetts, USA
  • Ore Knob Copper Mine, Ashe, Ashe Co., North Carolina, USA
  • Ore Hill mine, Warren, Grafton Co., New Hampshire, USA
  • Snow/Sackett/Marcia/Old/Melvin/Wright Mines etc, Chester, Hampden Co., Massachusetts, USA
  • Warren Nickel prospect, Warren, Knox Co., Maine, USA
  • North Mountain Serpentine locality, Cheshire, Berkshire Co., Massachusetts, USA
  • Unnammed Quartz propspects, Chester, Hampden Co., Massachusetts, USA
  • Tungsten Mine, Trumbull, Fairfield Co., Connecticut, USA
  • Pine Creek Mine, Bishop, Inyo Co., California, USA
  • Pine Island, Orange Co., New York, USA
  • Poorhouse Quarry, Embrieville, Chester Co., Pennsylvania, USA
  • Russell, St.Lawrence Co., New York, USA
  • Rockport, Cape Ann, Essex Co., Massachusetts, USA
  • Road Gulch, Fremont Co., Colorado, USA
  • Ringwood Iron Mine, Ringwood, Passaic Co., New Jersey, USA
  • "Redstone Green Granite"" quarry, Conway, Carroll Co., New Hampshire, USA"
  • Questa Mine, Taos Co., New Mexico, USA
  • Providence, Providence Co., Rhode Island, USA
  • Pound of Tea Island Epidote locality, Freeport, Cumberland Co., Maine, USA
  • Treadwell Mine, Douglas Island opposite Junea City, SE Juneau Area, Alaska, USA


Bibliografía y más información

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

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