Potassic-chloropargasite Mineral Data

Potassic-chloropargasite Mineral Data

General Potassic-chloropargasite Information

Chemical Formula:

(K,Na)Ca2(Mg,Fe2+)4Al(Si6Al2O22)(Cl,OH)2

Composition:

Molecular Weight = 930.36 gm

Potassium 2.52 % K 3.04 % K₂O

Sodium 0.99 % Na 1.33 % Na₂O

Calcium 8.18 % Ca 11.45 % CaO

Magnesium 5.49 % Mg 9.10 % MgO

Aluminum 7.83 % Al 14.80 % Al₂O₃

Iron 13.21 % Fe 16.99 % FeO

Silicon 18.11 % Si 38.75 % SiO₂

Hydrogen 0.10 % H 0.87 % H₂O

Chlorine 4.19 % Cl 4.19 % Cl

- % Cl -0.95 % -O=Cl₂

Oxygen 39.38 % O

______ ______

100.00 % 99.57 % = TOTAL OXIDE

Empirical Formula:

K_0.6Na_0.4Ca_1.9Mg_2.1Fe²⁺_2.2Si₆Al_2.7O₂₂Cl_1.1(OH)_0.9

Environment:

Granulite facies metamorphic complex. (amphibole group)

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Elgoras Mountian, Sal'nye Tundry massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as K-rich chloroparagasite as per IMA-approved amphibole nomenclature.

Synonym:

Chloroparagasite-K

IMA2001-036

IMA2001-044??

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Potassic-chloropargasite Crystallography

Axial Ratios:

a:b:c =0.5429:1:0.2957

Cell Dimensions:

a = 9.843, b = 18.13, c = 5.362, Z = 2; beta = 105.5° V = 922.07 Den(Calc)= 3.35

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Physical Properties of Potassic-chloropargasite

Cleavage:

[110] Perfect, [110] Perfect

Color:

Black.

Density:

3.29

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Streak:

olive green

Optical Properties of Potassic-chloropargasite

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2042,KPDmeas= 0.2079,KC= 0.2101

Optical Data:

Biaxial (-), a=1.675, b=1.687, g=1.69, bire=0.0150

Calculated Properties of Potassic-chloropargasite

Electron Density:

r_electron=3.24 gm/cc
note: r_{Potassic-chloropargasite}=3.29 gm/cc.

Fermion Index

Fermion Index = 0.01704
Boson Index = 0.98296

Photoelectric:

PE_{Potassic-chloropargasite}= 6.51 barns/electron
U=PE_{Potassic-chloropargasite} x r_electron= 21.08 barns/cc.

Radioactivity:

GRapi = 35.83 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Potassic-chloropargasite - barely detectable

Potassic-chloropargasite Classification

Dana Class:

66.1.3a.13b (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.1)Dana Type

(66.1.3a)Group 2, the calcic amphiboles

66.1.3a.1 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m

66.1.3a.2 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m

66.1.3a.3 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m

66.1.3a.4 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m

66.1.3a.5 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m

66.1.3a.6 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m

66.1.3a.6a Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m

66.1.3a.6b Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m

66.1.3a.6c Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m

66.1.3a.7 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m

66.1.3a.8 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

66.1.3a.9 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m

66.1.3a.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m

66.1.3a.10a Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m

66.1.3a.11 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m

66.1.3a.12 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m

66.1.3a.12a Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m

66.1.3a.13 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m

66.1.3a.13a Ferrochloropargasite! NaCa2(Fe4Al)Si6Al2O22Cl2 C 2/m 2/m

66.1.3a.13b Potassic-chloropargasite ! (K,Na)Ca2(Mg,Fe2)4Al(Si6Al2O22)(Cl,OH)2 C 2/m 2/m

66.1.3a.14 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m

66.1.3a.15 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m

66.1.3a.15a Potassic-chlorohastingsite! (K,Na)Ca2(Fe,Mg)4Fe[Si6Al2O22](Cl,OH)2 C 2/m 2/m

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

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

66.1.3a.17a Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono

66.1.3a.17b Potassicferrisadanagaite! (K,Na)Ca2(Fe,Mg)2(Fe,Al)2[Si5Al3O22](OH,F,O)2 C 2/m 2/m

66.1.3a.17c Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m

66.1.3a.18 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m

66.1.3a.19 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m

66.1.3a.20 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m

66.1.3a.20a Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m

66.1.3a.21 IMA2004-034! ([],Na)(Na,Ca)2(Mg,Fe)4Fe[Si8O22](OH)2 C 2/m 2/m

Strunz Class:

VIII/FX.00-00 VIII - Silicates

VIII/FX - Unclassified Strunz Inosilicates

VIII/FX.00 - Group 2, the calcic amphiboles

Other Potassic-chloropargasite Information

References:

NAME( AmMin, v 88, p 933) PHYS. PROP.(AmMin, v 88, p 933) OPTIC PROP.(AmMin, v 88, p 933)

See Also:

Links to other databases for Potassic-chloropargasite :
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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Potassic-chloropargasite

(K,Na)Ca2(Mg,Fe2+)4Al(Si6Al2O22)(Cl,OH)2
Dana No: 66.1.3a.13b Strunz No: VIII/FX.00-00
Locality:

Notes: