Potassicarfvedsonite Mineral Data

[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies]
We specialize in fine European and Asian Mineral Specimens
Heliodor is based in Prague, Czech Republic

General Potassicarfvedsonite Information

Chemical Formula:

KNa2Fe++4Fe+++Si8O22(OH)2

Composition:

Molecular Weight = 962.95 gm

Potassium 2.72 % K 3.28 % K₂O

Sodium 5.18 % Na 6.98 % Na₂O

Lithium 0.21 % Li 0.45 % Li₂O

Calcium 0.21 % Ca 0.29 % CaO

Magnesium 0.03 % Mg 0.04 % MgO

Titanium 0.25 % Ti 0.41 % TiO₂

Manganese 1.08 % Mn 1.40 % MnO

Aluminum 0.31 % Al 0.58 % Al₂O₃

Zinc 0.14 % Zn 0.17 % ZnO

Iron 27.14 % Fe 24.55 % FeO / 11.53 % Fe₂O₃

Silicon 22.63 % Si 48.42 % SiO₂

Hydrogen 0.19 % H 1.69 % H₂O

Oxygen 39.56 % O

Fluorine 0.36 % F 0.36 % F

- % F -0.15 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.67Na_0.22Na_1.95Ca_0.05Fe²⁺_3.29Fe³⁺_1.26Li_0.29Mn²⁺_0.19Ti_0.05Zn_0.02Mg_0.01Si_7.76 Fe³⁺_0.13Al_0.11O₂₂OH_1.81F_0.18

Environment:

Alkaline pegmatites in agpaitic complexe Ilímaussaq (Greenland). Amphibole group

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Ilímaussaq complex, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named as the K-dominant analogue of arfvedsonite.

Synonym:

IMA2003-043

Search for Potassicarfvedsonite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Potassicarfvedsonite Crystallography

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 - 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)(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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Pekov I V , Chukanov N V , Lebedeva Y S , Pushcharovsky D Y , Ferraris G , Gula A , Zadov A E , Novakova A A , Petersen O V , Neues Jahrbuch fur Mineralogie, Monatshefte , 2004 (2004) p.555-574, Potassicarfvedsonite, KNa2Fe2+4Fe3+Si8O22(OH)2,a K-dominant amphibole of the, arfvedsonite series from agpaitic pegmatites - Mineral data, structure, refinement and disorder in the A site, Locality: Ilimaussaq, Greenland

Physical Properties of Potassicarfvedsonite

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

Optical Properties of Potassicarfvedsonite

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.

Calculated Properties of Potassicarfvedsonite

Electron Density:

Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Potassicarfvedsonite =3.43 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Potassicarfvedsonite}= 9.73 barns/electron
U=PE_{Potassicarfvedsonite} x r_electron= 32.63 barns/cc.

Radioactivity:

GRapi = 38.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Potassicarfvedsonite per GRapi unit = 2.61 (%)

Estimated Radioactivity from Potassicarfvedsonite - barely detectable

Potassicarfvedsonite Classification

Dana Class:

66.01.03c.09b (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.01)with P=2 amphibole configuration

(66.01.03c)Group 4, the sodic amphiboles

66.01.03c.01 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m

66.01.03c.02 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m

66.01.03c.03 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m

66.01.03c.04 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m

66.01.03c.05 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m

66.01.03c.06 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m

66.01.03c.07 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m

66.01.03c.08 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

66.01.03c.09 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m

66.01.03c.09a Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m

66.01.03c.09b Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m

66.01.03c.10 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m

66.01.03c.11 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m

66.01.03c.11a Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

66.01.03c.11b Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

66.01.03c.11c Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m

66.01.03c.12 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

66.01.03c.12a Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m

66.01.03c.12b Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m

66.01.03c.13 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

66.01.03c.14 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m

66.01.03c.15 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m

66.01.03c.16 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m

66.01.03c.17 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m

Strunz Class:

09.DE.25 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family

09.DE.25 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m

09.DE.25 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m

09.DE.25 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m

09.DE.25 Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.25 Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.25 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m

09.DE.25 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m

09.DE.25 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m

09.DE.25 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

09.DE.25 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m

09.DE.25 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m

09.DE.25 Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m

09.DE.25 Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m

09.DE.25 Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m

09.DE.25 Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m

09.DE.25 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m

Other Potassicarfvedsonite Information

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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Potassicarfvedsonite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Potassicarfvedsonite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Potassicarfvedsonite Mineral Data :

Ask about Potassicarfvedsonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Potassicarfvedsonite Specimen Label here :

Potassicarfvedsonite

KNa2Fe++4Fe+++Si8O22(OH)2
Dana No: 66.01.03c.09b Strunz No: 09.DE.25
Locality:

Notes: