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Actinolite Mineral Data

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General Actinolite Information

Help on Chemical  Formula: Chemical Formula: Ca2(Mg,Fe++)5Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 853.16 gm
   Sodium      0.59 %  Na    0.80 % Na2O
   Calcium     8.60 %  Ca   12.03 % CaO
   Magnesium   9.71 %  Mg   16.11 % MgO
   Titanium    0.11 %  Ti    0.19 % TiO2
   Manganese   0.13 %  Mn    0.17 % MnO
   Aluminum    1.39 %  Al    2.63 % Al2O3
   Iron        8.58 %  Fe   10.61 % FeO /  0.47 % Fe2O3
   Silicon    25.64 %  Si   54.86 % SiO2
   Hydrogen    0.24 %  H     2.11 % H2O
   Oxygen     45.01 %  O
             ______        ______ 
             100.00 %       99.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.83Na0.22Mg3.41Fe2+1.26Al0.23Fe3+0.05Mn2+0.02Ti0.02Si7.79Al0.21O22(OH)2
Help on Environment: Environment: Metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1794
Help on Locality: Locality: Common world wide. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, aktinos, meaning "ray" in allusion to actinolite's fibrous nature.
Help on Name Pronunciation: Name Pronunciation: Actinolite + Pronunciation Say ACTINOLITE
Help on Synonym: Synonym: Byssolite
  Hexagonite (Mn)
  ICSD 24900
  Mountain Leather
  Nephrite Jade
  PDF 41-1366
  Smaragdite - emerald green

Actinolite Image

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Comments: Sharp, floater actinolite crystal with a slight green tint.
Location: Namibian dessert, more or less due West of Uis, Namibia. Scale: 8.5 x 2.5 x 2 cm.
© Fabre Minerals

Actinolite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5436:1:0.2917
Help on Cell Dimensions: Cell Dimensions: a = 9.84, b = 18.1, c = 5.28, Z = 2; beta = 104.7° V = 909.61 Den(Calc)= 3.11
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.38(1), 3.12(1), 2.71(0.9),

Physical Properties of Actinolite

Help on Cleavage: Cleavage: {110} Perfect, {110} Perfect
Help on Color: Color: Green, Green black, Gray green, Black.
Help on Density: Density: 2.98 - 3.1, Average = 3.04
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Actinolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2039,KPDmeas= 0.2086,KC= 0.2082
Ncalc = 1.62 - 1.65
Help on Optical Data: Optical Data: Biaxial (-), a=1.613-1.628, b=1.627-1.644, g=1.638-1.655, bire=0.0250-0.0270, 2V(Calc)=78-82, 2V(Meas)=84-73. Dispersion r < v.
Help on Pleochroism (x): Pleochroism (x): very pale yellow, colorless, pale brown, or light green.
Help on Pleochroism (y): Pleochroism (y): greenish yellow, pale yellow green, pale brown, or bluish green.
Help on Pleochroism (z): Pleochroism (z): pale green, green, dark green, or pale bluish green.

Calculated Properties of Actinolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Actinolite =3.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEActinolite = 4.88 barns/electron
U=PEActinolite x rElectron Density= 14.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Actinolite is Not Radioactive

Actinolite Classification

Help on  Dana Class: Dana Class: 66.01.03a.02 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.01)with P=2 amphibole configuration
  (66.01.03a)Group 2, the calcic amphiboles
66.01.03a.01 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m
66.01.03a.02 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m
66.01.03a.03 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m
66.01.03a.04 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m
66.01.03a.05 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m
66.01.03a.06 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.06a Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m
66.01.03a.06b Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m
66.01.03a.06c Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m
66.01.03a.07 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m
66.01.03a.08 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
66.01.03a.09 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m
66.01.03a.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m
66.01.03a.10a Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m
66.01.03a.11 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m
66.01.03a.12 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m
66.01.03a.12a Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m
66.01.03a.13 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.13a Ferrochloropargasite! NaCa2(Fe4Al)Si6Al2O22Cl2 C 2/m 2/m
66.01.03a.13b Potassic-chloropargasite! (K,Na)Ca2(Mg,Fe2)4Al(Si6Al2O22)(Cl,OH)2 C 2/m 2/m
66.01.03a.13c Potassic-ferropargasite KCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.14 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.15 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.15a Potassic-chlorohastingsite! (K,Na)Ca2(Fe,Mg)4Fe[Si6Al2O22](Cl,OH)2 C 2/m 2/m
66.01.03a.15b Fluoro-magnesiohastingsite! (Na,K)Ca2(Mg,Fe,Ti)5(Si,Al)8O22F2 C 2/m 2/m
66.01.03a.15c Potassic-magnesiohastingsite! (K,Na)Ca2(Mg,Fe,Fe,Al)5(Si,Al)8O22(OH,Cl)2 C 2/m 2/m
66.01.03a.15d Chloro-potassichastingsite! KCa2(Fe3MgFe)(Si6Al2)S8O22Cl2 C 2/m 2/m
66.01.03a.15e Fluoro-potassichastingsite! KCa2(Fe2,Mg2,Fe)S5(Si6Al2)8O22F2 C 2/m 2/m
66.01.03a.16 Potassic-magnesiosadanagaite (K,Na)Ca2(Mg,Fe,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono
66.01.03a.17 Sadanagaite (K,Na)Ca2(Fe,Mg,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono
66.01.03a.17a Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono
66.01.03a.17b Potassicferrisadanagaite! (K,Na)Ca2(Fe,Mg)2(Fe,Al)2[Si5Al3O22](OH,F,O)2 C 2/m 2/m
66.01.03a.17c Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m
66.01.03a.18 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m
66.01.03a.19 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m
66.01.03a.20 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m
66.01.03a.20a Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DE.10 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family
09.DE.10 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
09.DE.10 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m
09.DE.10 Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m
09.DE.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m
09.DE.10 Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m
09.DE.10 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m
09.DE.10 Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m
09.DE.10 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m
09.DE.10 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m
09.DE.10 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m
09.DE.10 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m
09.DE.10 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m
09.DE.10 Potassic-magnesiosadanagaite (K,Na)Ca2(Mg,Fe,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono
09.DE.10 Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m
09.DE.10 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m
09.DE.10 Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m
09.DE.10 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m
09.DE.10 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m
09.DE.10 Joesmithite PbCa2(Mg,Fe,Fe)5Si6Be2O22(OH)2 P 2/a 2/m
09.DE.10 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m
09.DE.10 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m
09.DE.10 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m
09.DE.10 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m
09.DE.10 Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono
09.DE.10 Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m
09.DE.10 Sadanagaite (K,Na)Ca2(Fe,Mg,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono
09.DE.10 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m
09.DE.10 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m
09.DE.10 Fluoro-magnesiohastingsite! (Na,K)Ca2(Mg,Fe,Ti)5(Si,Al)8O22F2 C 2/m 2/m
09.DE.10 Parvo-manganotremolite! [](CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m
09.DE.10 Fluoropargasite! NaCa2(Mg3FeAl)5(Si6Al2O22)F2 C 2/m 2/m
09.DE.10 Parvo-mangano-edenite! Na(CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m
09.DE.10 Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m
09.DE.10 Fluoro-potassichastingsite! KCa2(Fe2,Mg2,Fe)S5(Si6Al2)8O22F2 C 2/m 2/m
09.DE.10 Chloro-potassichastingsite! KCa2(Fe3MgFe)(Si6Al2)S8O22Cl2 C 2/m 2/m
09.DE.10 Potassic-magnesiohastingsite! (K,Na)Ca2(Mg,Fe,Fe,Al)5(Si,Al)8O22(OH,Cl)2 C 2/m 2/m
09.DE.10 Potassic-ferropargasite KCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m

Other Actinolite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Actinolite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - CalTech Mineral Spectroscopy
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Glendale Community College
12 - Google Images
13 - Google Scholar
14 - Handbook of Mineralogy (MinSocAm)
15 - Handbook of Mineralogy (UofA)
16 - HyperPhysics
17 - MinDAT
18 - Mineral and Gemstone Kingdom
19 - Mineralienatlas (Deutsch)
20 - Online Mineral Museum
21 - QUT Mineral Atlas
22 - Ruff.Info
23 - Scandinavian mineral gallery
25 - YupRocks

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Dana No: 66.01.03a.02 Strunz No: 09.DE.10





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