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Potassic-magnesio-fluoro-arfvedsonite

A valid IMA mineral species
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08133620017271949053295.jpg
Potassic-magnesio-fluoro-arfvedsonite

Highway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
00370710017848741486699.jpg
Potassic-magnesio-fluoro-arfvedsonite

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada
04124930017271996014586.jpg
Potassic-magnesio-fluoro-arfvedsonite, etc.

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada
08133620017271949053295.jpg
Potassic-magnesio-fluoro-arfvedsonite

Highway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
04581020017847101538429.jpg
Potassic-magnesio-fluoro-arfvedsonite

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada
02296140017361051457920.jpg
Potassic-magnesio-fluoro-arfvedsonite, etc.

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada
08133620017271949053295.jpg
Potassic-magnesio-fluoro-arfvedsonite

Highway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
00370710017848741486699.jpg
Potassic-magnesio-fluoro-arfvedsonite

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada
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About Potassic-magnesio-fluoro-arfvedsoniteHide

02881810017271921198403.jpg
Johan August Arfwedson
Formula:
KNa2(Mg4Fe3+)(Si8O22)F2
The arfvedsonite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Fe as the dominant element in the C3+ position.

Potassic-magnesio-fluoro-arfvedsonite is defined with

A position: K dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: F dominant
Crystal System:
Monoclinic
Name:
Originally named potassium fluor-magnesio-arfvedsonite, but according to the 2012 amphibole nomenclature guidelines, the name is now potassic-magnesio-fluoro-arfvedsonite.
This page provides mineralogical data about Potassic-magnesio-fluoro-arfvedsonite.


Unique IdentifiersHide

Mindat ID:
29104
Long-form identifier:
mindat:1:1:29104:2

IMA Classification of Potassic-magnesio-fluoro-arfvedsoniteHide

IMA status:
Approved
IMA status notes:
Redefined by the IMA, Renamed by the IMA
IMA Formula:
KNa2(Mg4Fe3+)Si8O22F2
Approval year:
1985
First published:
1987
Approval history:
1985: Approved by CNMMN (IMA 1985-023) as potassium fluor-magnesio-arfvedsonite (following the nomenclature of Leake 1978). Data was given in Hogarth et al. (1987), but not published as a new species.
2006: Renamed by IMA (2006, special procedure) (re-introduced in abstract form by Hogarth 2006), as fluoro-potassic-magnesio-arfvedsonite.
2012: Renamed by IMA, special procedure, as potassic-magnesio-fluoro-arfvedsonite.

Redefined: IMA 2012 s.p.
Type description reference:
Hogarth, D. D. (2006) FLUORO-POTASSIC-MAGNESIO-ARFVEDSONITE, KNa2Mg5Si8O22F2, FROM THE OUTAOUAIS REGION, QUEBEC, CANADA. The Canadian Mineralogist, 44 (1) 289 doi:10.2113/gscanmin.44.1.289

Classification of Potassic-magnesio-fluoro-arfvedsoniteHide

Strunz-mindat (2026):
9.DE.25

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
PmfarfIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Potassic-magnesio-fluoro-arfvedsoniteHide

Cleavage:
Perfect
on {110}
Parting:
On {001}

Chemistry of Potassic-magnesio-fluoro-arfvedsoniteHide

Mindat Formula:
KNa2(Mg4Fe3+)(Si8O22)F2

The arfvedsonite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Fe as the dominant element in the C3+ position.

Potassic-magnesio-fluoro-arfvedsonite is defined with

A position: K dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: F dominant
Element Weights:
Element% weight
O41.274 %
Si26.346 %
Mg11.400 %
Fe6.548 %
Na5.392 %
K4.585 %
F4.456 %

Calculated from ideal end-member formula.
O
Si
Mg
Fe
Na
K
F
Elements listed:
F, Fe, K, Mg, Na, O, Si - search for minerals with similar chemistry

Chemical AnalysisHide

Oxide wt%:
 12
SiO254.80 %54.25 %
TiO20.15 %1.08 %
Al2O30.17 %0.03 %
Cr2O30.07 %
Fe2O39.84 %8.07 %
FeO2.61 %6.69 %
MnO0.11 %0.32 %
MgO17.44 %13.99 %
CaO2.37 %1.16 %
Na2O6.37 %6.33 %
K2O3.44 %5.20 %
F2.33 %2.20 %
ZnO0.05 %
Total:99.7 %99.37 %
Empirical formulas:
Sample IDEmpirical Formula
1(K0.63 Na0.15) 0.78 (Na1.62Ca0.36Mn0.02) 2.00 (Mg3.72 Fe2+ 0.31 Fe3+ 0.95Mn0.00Ti0.02Al0.00) 5.00(Si7.85Al0.03 Fe3+ 0.11Cr0.01) 8.00O22[F1.06(OH) 0.94]2.00
2K0.98 (Na1.81Ca0.18) 1.99 (Mg3.07 Fe2+ 0.83 Fe3+ 0.90Mn0.04Ti0.12Zn0.01 Al0.01) 4.98Si8.00)O22[F1.03(OH) 0.73O 0.24] 2.00
Sample references:
IDTypeLocalityReferenceNotes
1Type SpecimenHighway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
Hogarth, D.D., Chao, G.Y., Townsend, M.G. (1987) Potassium- and fluorine-rich amphiboles from the Gatineau area, Quebec. The Canadian Mineralogist, 25. 739-753
The sample were analyzed at Virginia Polytechnic Institute by wavelength dispersion, using a 9-channel ARL - SEMQ microprobe.Fe2+/Fe3+ ratio were found by by Mossbauer spectroscopy. The cell parameters were determined from single-crystal X-ray powder-diffraction data.
2AS04-36Monte Metocha, Xixano, Montepuez District, Cabo Delgado Province, Mozambique
Oberti, R., Boiocchi, M., Hawthorne, F. C., Robinson, P. (2010) Crystal structure and crystal chemistry of fluoro-potassic-magnesio-arfvedsonite from Monte Metocha, Xixano region, Mozambique, and discussion of the holotype from Quebec, Canada. Mineralogical Magazine, 74 (6) 951-960 doi:10.1180/minmag.2010.074.6.951
The sample was analyzed by electron microprobe using a Cameca SX-100 operating in wavelength-dispersive mode. The powder-diffraction pattern was recorded from a small fragment on a 114.6 mm Debye-Scherrer powder camera with a Gandolfi attachment and Ni-filtered Cu-Ka X-radiation The Fe2+-Fe3+ ratio and the H2O content were derived from the results of crystal-structure refinement. The oxo component (O2 at the O(3) site) was estimated based on the Ti content.

Crystallography of Potassic-magnesio-fluoro-arfvedsoniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
B2/m
Morphology:
Elongated crystals with striations parallel to c
Twinning:
Common on TL, as simple or lamellar (ll57A) on {100}
Comment:
By analogy to other Arfvedsonites

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere>4.45
17 : Marine authigenic Hadean minerals (see also #24)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of Potassic-magnesio-fluoro-arfvedsoniteHide

Type Locality:
ⓘ Highway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
Place of Conservation of Type Material:
No designated type specimen.
Empirical Formula of Type Material:
(K0.63 Na0.15) 0.78 (Na1.62Ca0.36Mn0.02) 2.00 (Mg3.72 Fe2+ 0.31 Fe3+ 0.95Mn0.00Ti0.02Al0.00) 5.00(Si7.85Al0.03 Fe3+ 0.11Cr0.01) 8.00O22[F1.06(OH) 0.94]2.00
Geological Setting of Type Material:
Narrow dolomite-amphibole veins cutting mesoproterozoic alkali feldspar trachyte,
Reference:
Hogarth, D. D. (2006) FLUORO-POTASSIC-MAGNESIO-ARFVEDSONITE, KNa2Mg5Si8O22F2, FROM THE OUTAOUAIS REGION, QUEBEC, CANADA. The Canadian Mineralogist, 44 (1) 289 doi:10.2113/gscanmin.44.1.289

Synonyms of Potassic-magnesio-fluoro-arfvedsoniteHide

Other Language Names for Potassic-magnesio-fluoro-arfvedsoniteHide

Relationship of Potassic-magnesio-fluoro-arfvedsonite to other SpeciesHide

Member of:
Arfvedsonite Root Name Group > Sodium Amphibole Subgroup > w(OH,F,Cl)-dominant Amphibole Group > Amphibole Supergroup
Other Members of Arfvedsonite Root Name Group:
ArfvedsoniteNaNa2(Fe2+4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
'Fluoro-arfvedsonite'NaNa2(Fe2+4Fe3+)Si8O22F2
Magnesio-arfvedsoniteNaNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
Magnesio-fluoro-arfvedsoniteNaNa2(Mg4Fe3+)[Si8O22]F2Mon. 2/m : B2/m
Potassic-arfvedsoniteKNa2(Fe2+4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
Potassic-magnesio-arfvedsoniteKNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Potassic-magnesio-fluoro-arfvedsonite associated with MicroclineK(AlSi3O8)
2 photos of Potassic-magnesio-fluoro-arfvedsonite associated with RichteriteNa(CaNa)Mg5(Si8O22)(OH)2
2 photos of Potassic-magnesio-fluoro-arfvedsonite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
1 photo of Potassic-magnesio-fluoro-arfvedsonite associated with AgrelliteNaCa2Si4O10F
1 photo of Potassic-magnesio-fluoro-arfvedsonite associated with FluoriteCaF2

Related Minerals - Strunz-mindat GroupingHide

9.DE.ShojiiteNa(NaMg)Mg5Si8O22(OH)2Mon. 2/m : B2/m
9.DE.Clino-suenoite◻Mn2+2(Mg5)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.Mangani-eckermanniteNaNa2(Mg4Mn3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.05'Permanganogrunerite'◻{Mn2+2}{Mn2+5}(Si8O22)(OH)2Mon.
9.DE.05Cummingtonite◻Mg2Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Ferri-fluoro-leakeiteNaNa2(Mg2Fe3+2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.05Grunerite◻Fe2+2Fe2+5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Clino-holmquistite Root Name Group◻Li2(C2+3C3+2)(Si8O22)w2Mon.
9.DE.10Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-cannilloiteCaCa2(Mg4Al)(Si5Al3)O22F2Mon. 2/m : B2/m
9.DE.10JoesmithitePb2+Ca2(Mg3Fe3+2)(Si6Be2)O22(OH)2Mon. 2/m : P2/b
9.DE.10Clino-ferro-suenoite◻Mn2+2(Fe2+5)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-tremolite◻Ca2Mg5(Si8O22)F2Mon. 2/m : B2/m
9.DE.10'Parvo-manganotremolite'◻{CaMn2+}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Magnesio-ferri-hornblende◻Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2Mon. 2/m : B2/m
9.DE.10Ferro-ferri-hornblende◻Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.10'Ferro-cannilloite'CaCa2(Fe2+4Al)(Si5Al3O22)OH2
9.DE.10'Ferro-ferri-cannilloite'CaCa2(Fe2+4Fe3+)(Si5Al3O22)OH2
9.DE.10'Ferro-fluoro-actinolite'◻{Ca2}{Fe5}(Si8O22)F2
9.DE.10'Ferro-fluoro-hornblende'◻Ca2(Fe2+4Al)(AlSi7O22)F2
9.DE.10Magnesio-ferri-fluoro-hornblende◻Ca2(Mg4Fe3+)(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.10'Ferro-ferri-fluoro-hornblende'◻Ca2(Fe2+4Fe3+)(AlSi7O22)F2
9.DE.10'Ferri-fluoro-tschermakite'◻{Ca2}{Mg3Fe3+2}(Al2Si6O22)F2
9.DE.10'Ferro-ferri-fluoro-tschermakite'◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)F2
9.DE.10'Ferro-fluoro-tschermakite'◻{Ca2}{Fe2+3Al2}(Al2Si6O22)F2
9.DE.10'Fluoro-tschermakite'◻{Ca2}{Mg3Al2}(Al2Si6O22)F2
9.DE.10'Magnesio-fluoro-hornblende'◻Ca2(Mg4Al)(AlSi7O22)F2
9.DE.10Tremolite◻Ca2Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10'Ferro-ferri-tschermakite'◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2Mon.
9.DE.10'Cannilloite'CaCa2(Mg4Al)(Si5Al3O22)OH2Mon.
9.DE.10Tschermakite◻Ca2(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.10'Ferri-tschermakite'◻Ca2(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon.
9.DE.10Ferro-actinolite◻Ca2Fe2+5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Ferro-hornblende◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.10Ferro-tschermakite◻Ca2(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-pargasiteKCa2(Mg4Al)(Si6Al2)O22Cl2Mon. 2/m : B2/m
9.DE.15'Ferro-fluoro-pargasite'(Na)(Ca2)(Fe2+4Al)(Al2Si6O22)F2
9.DE.15'Potassic-ferro-chloro-edenite'KCa2Fe2+5(AlSi7O22)Cl2
9.DE.15'Ferro-ferri-sadanagaite'NaCa2(Fe2+3Fe3+2)(Al3Si5O22)(OH)2Mon.
9.DE.15HastingsiteNaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-edeniteNaCa2Mg5(Si7Al)O22F2Mon. 2/m : P2/m
9.DE.15PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Magnesio-fluoro-hastingsiteNaCa2(Mg4Fe3+)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-hastingsiteKCa2(Fe2+4Fe3+)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-hastingsiteKCa2(Fe2+4Fe3+)(Si6Al2)O22Cl2Mon. 2/m : B2/m
9.DE.15'Unnamed (F-dominant analogue of Ferri-kaersutite)'(Na,K)Ca2[Mg3(Fe3+,Fe2+)Ti](Si6Al2O22)(F,O)2Mon. 2/m : B2/m
9.DE.15EdeniteNaCa2Mg5(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-sadanagaiteKCa2(Mg3Al2)(Al3Si5O22)(OH)2Mon. 2
9.DE.15Ferri-kaersutiteNaCa2(Mg3Fe3+Ti)(Si6Al2O22)O2Mon. 2/m : B2/m
9.DE.15Potassic-pargasiteKCa2(Mg4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-sadanagaiteKCa2(Fe2+3Al2)(Al3Si5O22)(OH)2Mon.
9.DE.15KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2Mon. 2/m : B2/m
9.DE.15'Ferro-chloro-pargasite'NaCa2(Fe2+4Al)(Al2Si6O22)Cl2
9.DE.15Potassic-fluoro-pargasiteKCa2(Mg4Al)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-ferri-sadanagaiteKCa2(Fe2+3Fe3+2)(Al3Si5O22)(OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-pargasiteNaCa2(Mg4Al)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15'Parvo-mangano-edenite'{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.15Ferro-fluoro-edeniteNaCa2Fe2+5(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.15Mangani-pargasiteNaCa2(Mg4Mn3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15SadanagaiteNaCa2(Mg3Al2)(Si5Al3O22)(OH)2Mon.
9.DE.15Magnesio-hastingsiteNaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15'Ferri-sadanagaite'NaCa2(Mg3Fe3+2)(Al3Si5O22)(OH)2
9.DE.15'Ferro-sadanagaite'NaCa2(Fe3Al2)(Al3Si5O22)(OH)2
9.DE.15'Ferri-fluoro-sadanagaite'{Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2
9.DE.15'Ferro-ferri-fluoro-sadanagaite'{Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2
9.DE.15'Ferro-fluoro-sadanagaite'{Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2
9.DE.15'Fluoro-sadanagaite'{Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2
9.DE.15'Potassic-chloro-sadanagaite'KCa2(Mg3Al2)(Al3Si5O22)Cl2
9.DE.15'Potassic-ferro-chloro-sadanagaite'KCa2(Fe2+3Al2)(Al3Si5O22)Cl2
9.DE.15Ferro-edeniteNaCa2Fe2+5(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.15Oxo-magnesio-hastingsiteNaCa2(Mg3(Fe3+2-x,Tix))5(Si6Al2O22)O2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-pargasiteKCa2(Fe2+4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-hastingsiteKCa2(Fe2+4Fe3+)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15