Potassic-chlorohastingsite Mineral Data

Potassic-chlorohastingsite Mineral Data

General Potassic-chlorohastingsite Information

Chemical Formula:

(K,Na)Ca2(Fe++,Mg)4Fe+++[Si6Al2O22](Cl,OH)2

Composition:

Molecular Weight = 994.80 gm

Potassium 2.36 % K 2.84 % K₂O

Sodium 0.92 % Na 1.25 % Na₂O

Calcium 8.06 % Ca 11.27 % CaO

Magnesium 2.44 % Mg 4.05 % MgO

Aluminum 5.42 % Al 10.25 % Al₂O₃

Iron 22.46 % Fe 21.67 % FeO / 8.03 % Fe₂O₃

Silicon 16.94 % Si 36.24 % SiO₂

Hydrogen 0.06 % H 0.54 % H₂O

Chlorine 4.99 % Cl 4.99 % Cl

- % Cl -1.13 % -O=Cl₂

Oxygen 36.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.6Na_0.4Ca₂Fe²⁺₃MgFe³⁺(Si₆Al₂O₂₂)Cl_1.4(OH)_0.6

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Dasshkesan Co-Fe deposit, Azerbaidzhan. Link to MinDat.org Location Data.

Name Origin:

Named after its composition and for Hastings Co., Ontario, Canada..

Synonym:

Chlorohastingsite-K

Dashkesanite

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Potassic-chlorohastingsite Crystallography

Axial Ratios:

a:b:c =0.5553:1:0.294

Cell Dimensions:

a = 9.991, b = 17.99, c = 5.29, Z = 2; beta = 104.99° V = 918.46 Den(Calc)= 3.60

Crystal System:

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 8.53(1), 3.16(0.51), 2.749(0.23),2.839(0.18), 2.98(0.12), 3.32(0.11), 2.191(0.1),

Crystal Structure:

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Oberti R , Ungaretti L , Cannillo E , Hawthorne F C , American Mineralogist , 78 (1993) p.746-752, The mechanism of Cl incorporation in amphibole, Sample: Cl(1), Locality: Sesia-Lanzo marble, Western Alps, Italy

View Additional jPOWD Structure files for Potassic-chlorohastingsite
[1]

Physical Properties of Potassic-chlorohastingsite

Cleavage:

[110] Perfect, [100] Perfect

Color:

Dark green, Black.

Density:

3.17 - 3.59, Average = 3.38

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

greenish gray

Optical Properties of Potassic-chlorohastingsite

Optical Data:

Biaxial (-), a=1.669-1.68, b=1.682-1.695, g=1.684-1.705, bire=0.0150-0.0250

Calculated Properties of Potassic-chlorohastingsite

Electron Density:

r_electron=3.52 gm/cc
note: r_{Potassic-chlorohastingsite}=3.60 gm/cc.

Fermion Index

Fermion Index = 0.0154
Boson Index = 0.9846

Photoelectric:

PE_{Potassic-chlorohastingsite}= 9.12 barns/electron
U=PE_{Potassic-chlorohastingsite} x r_electron= 32.15 barns/cc.

Radioactivity:

GRapi = 33.34 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Potassic-chlorohastingsite - barely detectable

Potassic-chlorohastingsite Classification

Dana Class:

66.1.3a.15a (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-chlorohastingsite Information

References:

NAME( AmMin, V 84, p1688)

See Also:

Links to other databases for Potassic-chlorohastingsite :
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 10 - WWW-MINCRYST

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Print or Cut-and-Paste your Potassic-chlorohastingsite Specimen Label here :

Potassic-chlorohastingsite

(K,Na)Ca2(Fe++,Mg)4Fe+++[Si6Al2O22](Cl,OH)2
Dana No: 66.1.3a.15a Strunz No: VIII/FX.00-00
Locality:

Notes: