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Arrojadite-(KNa)

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Formula:
{KNa}{Na2}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Crystal System:
Monoclinic
Name:
For Miguel Arrojado Lisbôa, Brazilian geologist and Redefinition after the new arrojadite nomenclature (CNMMN 05-D, October 2005).

Classification of Arrojadite-(KNa)

Approved
Approval Year:
2005
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

Chemical Properties of Arrojadite-(KNa)

Formula:
{KNa}{Na2}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
IMA Formula:
KNa3(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2

Crystallography of Arrojadite-(KNa)

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)

Type Occurrence of Arrojadite-(KNa)

Synonyms of Arrojadite-(KNa)

Other Language Names for Arrojadite-(KNa)

Relationship of Arrojadite-(KNa) to other Species

Other Members of this group:
Arrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Arrojadite-(BaNa)BaNa3(NaCa)Fe2+13Al(PO4)11(PO3OH)(OH)
Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Arrojadite-(KFeNa){KNa}{Fe2+◻}{Ca}{Na3}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Arrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Arrojadite-(PbFe){Pb◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Arrojadite-(SrFe){Sr◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn2+13}{Al}(PO4)12(OH)2
Ferri-arrojadite-(BaNa){Ba◻}{Na2}{Ca}{Na2◻}{Fe2+13}{Fe3+}(PO4)11(HPO4)(OH)2
Fluorarrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
Fluorarrojadite-(BaNa)BaNa4CaFe13Al(PO4)11(PO3OH)F2
Fluorarrojadite-(KNa){KNa}{Na2}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
Fluorarrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
Fluorcarmoite-(BaNa)Ba□Na2Na2□CaMg13Al(PO4)11(PO3OH)F2

Related Minerals - Nickel-Strunz Grouping

8.BF.05Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn2+13}{Al}(PO4)12(OH)2
8.BF.05Arrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(SrFe){Sr◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(PbFe){Pb◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Fluorarrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
8.BF.05Arrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(BaNa)BaNa3(NaCa)Fe2+13Al(PO4)11(PO3OH)(OH)
8.BF.05Fluorarrojadite-(KNa){KNa}{Na2}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
8.BF.05Fluorarrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)F2
8.BF.10Samuelsonite(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2
8.BF.15GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8
8.BF.20NabiasiteBaMn2+9(VO4,AsO4)6(OH)2

Other Information

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

References for Arrojadite-(KNa)

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cámara, 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, 1249-1259
Chopin, C., Oberti, R., Cámara, F. (2006): The arrojadite enigma: II. Compositional space, new members and nomenclature of the group. American Mineralogist, 91, 1260-1270.

Internet Links for Arrojadite-(KNa)

mindat.org URL:
https://www.mindat.org/min-28959.html
Please feel free to link to this page.

Localities for Arrojadite-(KNa)

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada (TL)
 
  • Yukon
    • Dawson Mining District
CÁMARA, 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, 1249-1259 CHOPIN, C., OBERTI, R., CÁMARA, F. (2006): The arrojadite enigma: II. Compositional space, new members and nomenclature of the group. American Mineralogist, 91, 1260-1270.
Italy
 
  • Lombardy
    • Lecco Province
      • Colico
        • Piona Peninsula
Vignola, P., Fransolet, A.M., Guastoni, A. & Appiani, R. (2011). Le pegmatiti di Piona. Recenti studi sui filoni Malpensata, Luna e Sommafiume. Rivista Mineralogica Italiana, 1/2011, 30-38
Mineral and/or Locality  
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