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Potassicarfvedsonite Mineral Data
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General Potassicarfvedsonite Information
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 Chemical Formula: |
KNa2Fe++4Fe+++Si8O22(OH)2 |
| Composition: |
Molecular Weight = 962.95 gm |
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Potassium 2.72 % K 3.28 % K2O |
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Sodium 5.18 % Na 6.98 % Na2O |
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Lithium 0.21 % Li 0.45 % Li2O |
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Calcium 0.21 % Ca 0.29 % CaO |
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Magnesium 0.03 % Mg 0.04 % MgO |
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Titanium 0.25 % Ti 0.41 % TiO2 |
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Manganese 1.08 % Mn 1.40 % MnO |
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Aluminum 0.31 % Al 0.58 % Al2O3 |
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Zinc 0.14 % Zn 0.17 % ZnO |
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Iron 27.14 % Fe 24.55 % FeO / 11.53 % Fe2O3 |
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Silicon 22.63 % Si 48.42 % SiO2 |
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Hydrogen 0.19 % H 1.69 % H2O |
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Oxygen 39.56 % O |
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Fluorine 0.36 % F 0.36 % F |
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- %
F -0.15 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.67Na0.22Na1.95Ca0.05Fe2+3.29Fe3+1.26Li0.29Mn2+0.19Ti0.05Zn0.02Mg0.01Si7.76
Fe3+0.13Al0.11O22OH1.81F0.18 |
| Environment: |
Alkaline pegmatites in agpaitic complexe Il�maussaq (Greenland). Amphibole group |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Il�maussaq complex, Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the K-dominant analogue of arfvedsonite. |
| Synonym: |
IMA2003-043 |
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Potassicarfvedsonite Crystallography
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| Axial Ratios: |
a:b:c =0.554:1:0.2946 |
| Cell Dimensions: |
a = 10.002, b = 18.054, c = 5.319, Z = 2; beta = 103.9° V = 932.36 Den(Calc)= 3.43 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 8.53(1)(110), 3.184(0.4)(310), 9.02(0.28)(020),3.303(0.23)(240), 2.847(0.17)(330), 3.419(0.12)(131), 2.725(0.1)(151), |
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Physical Properties of Potassicarfvedsonite
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| Cleavage: |
{110} Perfect, {110} Perfect |
| Color: |
Bluish gray, Dark blue green. |
| Diaphaneity: |
Translucent to transparent |
| Fracture: |
Brittle - Splintery - Brittle fracture leaving splintery fragments. |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
5.5-6 - Knife Blade-Orthoclase |
| Luster: |
Vitreous (Glassy) |
| Streak: |
pale blue |
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Optical Properties of Potassicarfvedsonite
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| Gladstone-Dale: |
CI calc= 0.07 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2016,KC= 0.2167
Ncalc = 1.74 |
| Optical Data: |
Biaxial (-), a=1.683, b=1.692, g=1.699, bire=0.0160, 2V(Calc)=82, 2V(Meas)=>60. Dispersion strong, r > v. |
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Calculated Properties of Potassicarfvedsonite
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| Electron Density: |
Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Potassicarfvedsonite =3.43 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEPotassicarfvedsonite = 9.73 barns/electron
U=PEPotassicarfvedsonite x relectron= 32.63 barns/cc.
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| Radioactivity: |
GRapi = 38.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Potassicarfvedsonite per GRapi unit = 2.61 (%)
Estimated Radioactivity from Potassicarfvedsonite  - barely detectable
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Potassicarfvedsonite Classification
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| Dana Class: |
66.01.03c.09b (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03c)Group 4, the sodic amphiboles |
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66.01.03c.01 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.02 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.03 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.04 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.05 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.06 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.07 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.08 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.09 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.09a Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m |
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66.01.03c.09b Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m |
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66.01.03c.10 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.11 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03c.11a Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.01.03c.11b Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m |
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66.01.03c.11c Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m |
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66.01.03c.12 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m |
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66.01.03c.12a Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m |
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66.01.03c.12b Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m |
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66.01.03c.13 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m |
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66.01.03c.14 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m |
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66.01.03c.15 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m |
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66.01.03c.16 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m |
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66.01.03c.17 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m |
| Strunz Class: |
09.DE.25 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.25 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m |
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09.DE.25 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m |
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09.DE.25 Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.25 Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m |
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09.DE.25 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m |
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09.DE.25 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.25 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m |
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09.DE.25 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m |
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09.DE.25 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m |
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09.DE.25 Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m |
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09.DE.25 Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m |
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09.DE.25 Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m |
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09.DE.25 Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m |
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09.DE.25 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m |
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Other Potassicarfvedsonite Information
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| References: |
NAME( AmMin, v90, p1437) PHYS. PROP.(AmMin, v90, p1437) OPTIC PROP.(AmMin, v90, p1437) |
| See Also: |
Links to other databases for Potassicarfvedsonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Potassicarfvedsonite
KNa2Fe++4Fe+++Si8O22(OH)2
Dana No: 66.01.03c.09b Strunz No: 09.DE.25
Locality:
Notes:
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