General Potassicpargasite Information
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Chemical Formula: |
(K,Na)Ca2(Mg,Fe++)5Si8O22(OH,F)2 |
Composition: |
Molecular Weight = 906.89 gm |
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Potassium 2.16 % K 2.60 % K2O |
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Sodium 1.27 % Na 1.71 % Na2O |
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Calcium 8.84 % Ca 12.37 % CaO |
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Magnesium 8.04 % Mg 13.33 % MgO |
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Iron 12.32 % Fe 15.84 % FeO |
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Silicon 24.78 % Si 53.00 % SiO2 |
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Hydrogen 0.20 % H 1.79 % H2O |
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Oxygen 41.99 % O |
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Fluorine 0.42 % F 0.42 % F |
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- % F -0.18 % -O=F2 |
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______ ______ |
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100.00 % 100.88 % = TOTAL OXIDE |
Empirical Formula: |
K0.5Na0.5Ca2Mg3Fe2+2(Si8O22)(OH)1.8F0.2 |
Environment: |
With calcite in a metasomatic or skarn-type deposit. |
IMA Status: |
Approved IMA 1994 (Dana # Added) |
Locality: |
Pargas, Turku-Pori, Finland. Link to MinDat.org Location Data. |
Name Origin: |
Named after its containing potassium and the locality. |
Synonym: |
IMA1994-046 |
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Pargasite-K |
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Potassicpargasite Image |
Images:
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Potassicpargasite Crystallography
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Axial Ratios: |
a:b:c =0.5493:1:0.2944 |
Cell Dimensions: |
a = 9.9199, b = 18.0591, c = 5.318, Z = 2; beta = 105.36° V = 918.66 Den(Calc)= 3.28 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.14(1), 8.45(0.95), 2.344(0.7), |
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Crystal Structure:
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Robinson G W , Grice J D , Gault R A , Lalonde A E , The Canadian Mineralogist , 35 (1997) p.1535-1540, Potassicpargasite, a new member of the amphibole group, from Pargas, Turku-Pori, Finland, Locality: Pargas, Turku-Pori, Finland
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Physical Properties of Potassicpargasite
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Cleavage: |
[110] Perfect |
Color: |
Black. |
Density: |
3.25 |
Diaphaniety: |
Translucent to opaque |
Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
Habit: |
Intergrown Crystals - Occurs as intergrown crystalline aggregates |
Hardness: |
6-6.5 - Orthoclase-Pyrite |
Luster: |
Vitreous (Glassy) |
Streak: |
brownish green |
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Optical Properties of Potassicpargasite
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Gladstone-Dale: |
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.202,KPDmeas= 0.2039,KC= 0.2073 |
Optical Data: |
Biaxial (-), a=1.654, b=1.664, g=1.67, bire=0.0160, 2V(Calc)=74, 2V(Meas)=79. Dispersion dispersion not observed. |
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Calculated Properties of Potassicpargasite
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Electron Density: |
relectron=3.22 gm/cc note: rPotassicpargasite =3.25 gm/cc. |
Fermion Index |
Fermion Index = 0.02254 Boson Index = 0.97746 |
Photoelectric: |
PEPotassicpargasite = 6.08 barns/electron U=PEPotassicpargasite x relectron= 19.56 barns/cc. |
Radioactivity: |
GRapi = 30.79 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Potassicpargasite - barely detectable
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Potassicpargasite Classification
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Dana Class: |
66.1.3a.12a (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.1)Dana Type |
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(66.1.3a)Group 2, the calcic amphiboles |
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66.1.3a.1 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m |
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66.1.3a.2 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m |
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66.1.3a.3 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m |
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66.1.3a.4 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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66.1.3a.5 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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66.1.3a.6 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.1.3a.6a Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.1.3a.6b Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.1.3a.6c Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m |
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66.1.3a.7 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.1.3a.8 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.1.3a.9 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.1.3a.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m |
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66.1.3a.10a Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m |
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66.1.3a.11 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m |
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66.1.3a.12 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m |
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66.1.3a.12a Potassicpargasite ! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m |
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66.1.3a.13 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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66.1.3a.13a Ferrochloropargasite! NaCa2(Fe4Al)Si6Al2O22Cl2 C 2/m 2/m |
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66.1.3a.13b Potassic-chloropargasite! (K,Na)Ca2(Mg,Fe2)4Al(Si6Al2O22)(Cl,OH)2 C 2/m 2/m |
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66.1.3a.14 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.1.3a.15 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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66.1.3a.15a Potassic-chlorohastingsite! (K,Na)Ca2(Fe,Mg)4Fe[Si6Al2O22](Cl,OH)2 C 2/m 2/m |
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66.1.3a.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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66.1.3a.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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66.1.3a.17a Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono |
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66.1.3a.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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66.1.3a.17c Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m |
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66.1.3a.18 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m |
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66.1.3a.19 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m |
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66.1.3a.20 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m |
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66.1.3a.20a Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m |
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66.1.3a.21 IMA2004-034! ([],Na)(Na,Ca)2(Mg,Fe)4Fe[Si8O22](OH)2 C 2/m 2/m |
Strunz Class: |
VIII/F.10-125 VIII - Silicates |
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VIII/F - Inosilicates (chain and band) double chains [Si4O11]6- , Ca2-Amphiboles |
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VIII/F.10 - Amphibole group, Tremolite - Sadanagaite series |
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VIII/F.10-10 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m |
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VIII/F.10-20 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m |
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VIII/F.10-30 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m |
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VIII/F.10-40 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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VIII/F.10-50 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m |
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VIII/F.10-60 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m |
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VIII/F.10-65 Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m |
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VIII/F.10-70 Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m |
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VIII/F.10-75 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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VIII/F.10-77 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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VIII/F.10-80* Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m |
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VIII/F.10-80 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m |
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VIII/F.10-90 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m |
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VIII/F.10-92 Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m |
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VIII/F.10-100 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m |
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VIII/F.10-104 Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m |
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VIII/F.10-105 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m |
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VIII/F.10-110 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m |
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VIII/F.10-120 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m |
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VIII/F.10-125 Potassicpargasite (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m |
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VIII/F.10-130 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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VIII/F.10-140 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m |
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VIII/F.10-150 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m |
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VIII/F.10-160 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m |
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VIII/F.10-163 Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono |
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VIII/F.10-165 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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VIII/F.10-170 Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m |
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VIII/F.10-180 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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VIII/F.10-220 Potassicferrisadanagaite! (K,Na)Ca2(Fe,Mg)2(Fe,Al)2[Si5Al3O22](OH,F,O)2 C 2/m 2/m |
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Other Potassicpargasite Information
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References: |
NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.84,p195,1999) OPTIC PROP.(AmMin) |
See Also: |
Links to other databases for Potassicpargasite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
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Potassicpargasite
(K,Na)Ca2(Mg,Fe++)5Si8O22(OH,F)2
Dana No: 66.1.3a.12a Strunz No: VIII/F.10-125
Locality:
Notes:
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