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Arrojadite-(KNa)

A valid IMA mineral species
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About Arrojadite-(KNa)Hide

Formula:
(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
Colour:
Yellow
Crystal System:
Monoclinic
Name:
For Miguel Arrojado Lisbôa, Brazilian geologist and Redefinition after the new arrojadite nomenclature (CNMMN 05-D, October 2005).

Unique IdentifiersHide

Mindat ID:
28959
Long-form identifier:
mindat:1:1:28959:7
GUID
(UUID V4):
5abaeccb-99f2-45d5-8285-6834a86b8131

IMA Classification of Arrojadite-(KNa)Hide

Approved
IMA Formula:
KNa3(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2
Approval year:
2005
First published:
2006

Classification of Arrojadite-(KNa)Hide

8.BF.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1

Mineral SymbolsHide

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

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

Physical Properties of Arrojadite-(KNa)Hide

Transparency:
Transparent
Colour:
Yellow

Optical Data of Arrojadite-(KNa)Hide

Type:
Biaxial (+)
RI values:
nα = 1.651(1) nβ = 1.656(1) nγ = 1.662(10)
2V:
Measured: 87.8° (1), Calculated: 85°
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r << v.
Optical Extinction:
X = b; Y ≈ c.
Pleochroism:
Weak
Comments:
Very weak. Y = colorless; X = Z = pale yellow.
Comments:
Absorption: Y < X ≈ Z.

Chemistry of Arrojadite-(KNa)Hide

Mindat Formula:
(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2

Crystallography of Arrojadite-(KNa)Hide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Cell Parameters:
a = 16.552 Å, b = 10.0529 Å, c = 24.6477 Å
β = 106.509°
Ratio:
a:b:c = 1.646 : 1 : 2.452
Unit Cell V:
3,932.19 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004190Arrojadite-(KNa)Camara F, Oberti R, Chopin C, Medenbach O (2006) The arrojadite enigma: I. A new formula and a new model for the arrojadite structure American Mineralogist 91 1249-125920060293
0012657Arrojadite-(KNa)Steele I M (2002) Arrojadite: variations in space group and composition based on four new refinements General Meeting of the International Mineralogical Association 18 MO2-1172002Rapid Creek, Yukon, Canada0293
0012658Arrojadite-(KNa)Steele I M (2002) Arrojadite: variations in space group and composition based on four new refinements General Meeting of the International Mineralogical Association 18 MO2-1172002Palermo No. 1 mine, Groton, New Hampshire, USA0293
CIF Raw Data - click here to close

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Type Occurrence of Arrojadite-(KNa)Hide

General Appearance of Type Material:
Clear, yellow, mm-sized euhedral crystals. Stout, more-or-less platy prisms.
Place of Conservation of Type Material:
Ecole Nationale Supérieure des Mines, Paris, France, 41081.
Geological Setting of Type Material:
In open fractures in siderite-rich Lower Cretaceous sandstones. From low-salinity fluids, under very low-grade metamorphic conditions, at minimum temperatures of 180-200 C.
Associated Minerals at Type Locality:

Synonyms of Arrojadite-(KNa)Hide

Other Language Names for Arrojadite-(KNa)Hide

Relationship of Arrojadite-(KNa) to other SpeciesHide

Other Members of this group:
Arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. 2/m : B2/b
Arrojadite-(KFe)(KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Arrojadite-(KFeNa)(KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2
Arrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
Arrojadite-(PbFe)(Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Arrojadite-(SrFe)(Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Dickinsonite-(KMnNa)(KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2Mon. 2/m : B2/b
Ferri-arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2
Fluorarrojadite-(BaFe)(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
Fluorarrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
Fluorarrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Fluorarrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Fluorcarmoite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2Mon. m : Bb
Manganoarrojadite-(KNa)(KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
Sigismundite(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb

Related Minerals - Strunz-mindat GroupingHide

8.BF.Sigismundite(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.Manganoarrojadite-(KNa)(KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(KFe)(KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Dickinsonite-(KMnNa)(KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2Mon. 2/m : B2/b
8.BF.05Arrojadite-(SrFe)(Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Arrojadite-(PbFe)(Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. m : Bb
8.BF.05Fluorarrojadite-(BaFe)(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.05Arrojadite-(KFeNa)(KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2
8.BF.05Arrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
8.BF.05Arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2Mon. 2/m : B2/b
8.BF.05Ferri-arrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2
8.BF.05Fluorarrojadite-(KNa)(KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
8.BF.05Fluorarrojadite-(NaFe)(NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
8.BF.05Fluorcarmoite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.05Unnamed (Ba-dominant member of dickinsonite group)
8.BF.05Unnamed (Pb-dominant member of dickinsonite group)
8.BF.05Fluorarrojadite-(BaNa)(Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2Mon. m : Bb
8.BF.10Samuelsonite(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2Mon. 2/m : B2/m
8.BF.15GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8Iso. m3 (2/m 3) : Pa3
8.BF.20NabiasiteBaMn9(VO4)6(OH)2Iso. m3 (2/m 3) : Pa3
8.BF.25StarovaiteKCu5O(VO4)3 Tric. 1 : P1
8.BF.30Achyrophanite(K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5Orth. 2 2 2 : P2 2 21
8.BF.35CryptochalciteK2Cu5O(SO4)5Tric. 1 : P1
8.BF.35CesiodymiteCsKCu5O(SO4)5Tric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Arrojadite-(KNa)Hide

References for Arrojadite-(KNa)Hide

Localities for Arrojadite-(KNa)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Yukon
    • Dawson mining district
Anatoly Kasatkin
CÁMARA et al. (2006) +1 other reference
Italy
 
  • Lombardy
    • Lecco Province
      • Colico
        • Piona Peninsula
Vignola et al. (2011)
 
and/or  
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