General Tremolite Information
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 Chemical Formula: |
[ ]Ca2Mg5Si8O22(OH)2 |
| Composition: |
Molecular Weight = 812.37 gm |
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Calcium 9.87 % Ca 13.81 % CaO |
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Magnesium 14.96 % Mg 24.81 % MgO |
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Silicon 27.66 % Si 59.17 % SiO2 |
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Hydrogen 0.25 % H 2.22 % H2O |
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Oxygen 47.27 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Mg5(Si8O22)(OH)2 |
| Environment: |
Contact metamorphism of Ca rich rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1790 |
| Locality: |
Tremola Valley, Alps. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
| Name Pronunciation: |
Tremolite + Pronunciation  |
| Synonym: |
ICSD 30126 |
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PDF 44-1402 |
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Tremolite Image |
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Images:
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Tremolite
Comments: Dark green tremolite crystal cluster.
Location: Selleck Road Locality, West Pierrepont, St Lawrence Co., New York, USA.
Scale: 4.5x2x1.5 cm.
© John Betts - Fine Minerals |
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Images:
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Magnesiocoulsonite Tremolite
Comments: Black grains of magnesiocoulsonite with green chromian tremolite. Metallic bronze grain of thiospinelid of kalininite-florensovite series is visible in the upper right corner of the image.
Location: Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia.
Scale: FOV is 3x2 mm.
© Pavel M. Kartashov |
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Tremolite Crystallography
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| Axial Ratios: |
a:b:c =0.5449:1:0.2923 |
| Cell Dimensions: |
a = 9.8385, b = 18.0554, c = 5.2778, Z = 2; beta = 104.751° V = 906.64 Den(Calc)= 2.98 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.12(1), 8.38(1), 2.71(0.9), |
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Physical Properties of Tremolite
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| Cleavage: |
{110} Perfect, {010} Distinct |
| Color: |
Brown, Colorless, Gray, White, Light green. |
| Density: |
2.9 - 3.2, Average = 3.05 |
| Diaphaneity: |
Transparent to translucent |
| Fracture: |
Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. |
| Habit: |
Columnar - Forms columns |
| Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. |
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
| Hardness: |
5-6 - Between Apatite and Orthoclase |
| Luminescence: |
Fluorescent, Short UV=yellow, Long UV=range pink. |
| Luster: |
Vitreous - Pearly |
| Streak: |
white |
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Optical Properties of Tremolite
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| Gladstone-Dale: |
CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KPDmeas= 0.2028,KC= 0.2092
Ncalc = 1.61 - 1.67 |
| Optical Data: |
Biaxial (-), a=1.599-1.612, b=1.613-1.626, g=1.625-1.637, bire=0.0250-0.0260, 2V(Calc)=82-84, 2V(Meas)=88-80. Dispersion r < v. |
| Pleochroism (x): |
colorless. |
| Pleochroism (y): |
colorless. |
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Calculated Properties of Tremolite
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| Electron Density: |
Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Tremolite =2.98 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PETremolite = 2.61 barns/electron
U=PETremolite x rElectron Density= 7.76 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tremolite is Not Radioactive |
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Tremolite Classification
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| Dana Class: |
66.01.03a.01 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03a)Group 2, the calcic amphiboles |
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66.01.03a.01 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m |
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66.01.03a.02 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m |
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66.01.03a.03 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m |
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66.01.03a.04 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03a.05 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03a.06 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.06a Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.01.03a.06b Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.01.03a.06c Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m |
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66.01.03a.07 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.01.03a.08 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.01.03a.09 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.01.03a.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03a.10a Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m |
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66.01.03a.11 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03a.12 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.01.03a.12a Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m |
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66.01.03a.13 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.13a Ferrochloropargasite! NaCa2(Fe4Al)Si6Al2O22Cl2 C 2/m 2/m |
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66.01.03a.13b Potassic-chloropargasite! (K,Na)Ca2(Mg,Fe2)4Al(Si6Al2O22)(Cl,OH)2 C 2/m 2/m |
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66.01.03a.13c Potassic-ferropargasite KCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.14 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.15 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.15a Potassic-chlorohastingsite! (K,Na)Ca2(Fe,Mg)4Fe[Si6Al2O22](Cl,OH)2 C 2/m 2/m |
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66.01.03a.15b Fluoro-magnesiohastingsite! (Na,K)Ca2(Mg,Fe,Ti)5(Si,Al)8O22F2 C 2/m 2/m |
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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 |
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66.01.03a.15d Chloro-potassichastingsite! KCa2(Fe3MgFe)(Si6Al2)S8O22Cl2 C 2/m 2/m |
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66.01.03a.15e Fluoro-potassichastingsite! KCa2(Fe2,Mg2,Fe)S5(Si6Al2)8O22F2 C 2/m 2/m |
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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 |
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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 |
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66.01.03a.17a Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono |
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66.01.03a.17b Potassicferrisadanagaite! (K,Na)Ca2(Fe,Mg)2(Fe,Al)2[Si5Al3O22](OH,F,O)2 C 2/m 2/m |
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66.01.03a.17c Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m |
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66.01.03a.18 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m |
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66.01.03a.19 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m |
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66.01.03a.20 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m |
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66.01.03a.20a Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m |
| Strunz Class: |
09.DE.10 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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09.DE.10 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.10 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m |
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09.DE.10 Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m |
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09.DE.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.10 Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m |
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09.DE.10 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m |
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09.DE.10 Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m |
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09.DE.10 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m |
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09.DE.10 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.10 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m |
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09.DE.10 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.10 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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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 |
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09.DE.10 Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m |
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09.DE.10 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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09.DE.10 Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m |
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09.DE.10 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.10 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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09.DE.10 Joesmithite PbCa2(Mg,Fe,Fe)5Si6Be2O22(OH)2 P 2/a 2/m |
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09.DE.10 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m |
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09.DE.10 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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09.DE.10 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.10 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m |
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09.DE.10 Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono |
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09.DE.10 Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m |
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09.DE.10 Sadanagaite (K,Na)Ca2(Fe,Mg,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono |
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09.DE.10 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m |
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09.DE.10 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m |
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09.DE.10 Fluoro-magnesiohastingsite! (Na,K)Ca2(Mg,Fe,Ti)5(Si,Al)8O22F2 C 2/m 2/m |
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09.DE.10 Parvo-manganotremolite! [](CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.10 Fluoropargasite! NaCa2(Mg3FeAl)5(Si6Al2O22)F2 C 2/m 2/m |
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09.DE.10 Parvo-mangano-edenite! Na(CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.10 Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m |
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09.DE.10 Fluoro-potassichastingsite! KCa2(Fe2,Mg2,Fe)S5(Si6Al2)8O22F2 C 2/m 2/m |
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09.DE.10 Chloro-potassichastingsite! KCa2(Fe3MgFe)(Si6Al2)S8O22Cl2 C 2/m 2/m |
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09.DE.10 Potassic-magnesiohastingsite! (K,Na)Ca2(Mg,Fe,Fe,Al)5(Si,Al)8O22(OH,Cl)2 C 2/m 2/m |
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09.DE.10 Potassic-ferropargasite KCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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Other Tremolite Information
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| See Also: |
Links to other databases for Tremolite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - CalTech Mineral Spectroscopy
7 - EUROmin Project
8 - Ecole des Mines de Paris
9 - Franklin Minerals(Dunn)
10 - GeoScienceWorld
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - HyperPhysics
16 - MinDAT
17 - Mineral and Gemstone Kingdom
18 - Mineralienatlas (Deutsch)
19 - Minerals in Thin Section-University of North Carolina
20 - Minerals in Thin Sections-Humboldt State
21 - Online Mineral Museum
22 - QUT Mineral Atlas
23 - Ruff.Info
24 - Scandinavian mineral gallery
25 - WWW-MINCRYST
26 - YupRocks
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Tremolite
[ ]Ca2Mg5Si8O22(OH)2
Dana No: 66.01.03a.01 Strunz No: 09.DE.10
Locality:
Notes:
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