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Arrojadite-(KNa) (Arrojadit-(KNa))

Collectors Summary

Hardness (Mohs) 5
Solubility +++ verdünnte Säuren

Chemism

Chemical formula

KNa3(CaNa2)(Fe2+)13Al(PO4)11(PO3OH)(OH)2

Chemical composition

Aluminium, Calcium, Eisen, Natrium, Kalium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 2121.7751746 u; Number of atoms in the formula: 86

Info

Empirical formula:

KNa3(CaNa2)(Fe)13Al(PO4)11(PO3OH)(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.14

3

3.49

1.0079470

3.0238410
Oxygen

O

37.70

50

58.14

15.9994300

799.9715000
Sodium

Na

5.42

5

5.81

22.9897702

114.9488510
Aluminium

Al

1.27

1

1.16

26.9815382

26.9815382
Phosphorus

P

17.52

12

13.95

30.9737612

371.6851344
Potassium

K

1.84

1

1.16

39.0983100

39.0983100
Calcium

Ca

1.89

1

1.16

40.0784000

40.0784000
Iron

Fe

34.22

13

15.12

55.8452000

725.9876000

Analysis wt%

P2O5 : 40.00, Al2O3 : 2.66, FeO : 28.22, MnO : 15.78, MgO : 1.04, CaO : 2.46, Na2O : 6.40, K2O : 1.74, H2O : 0.91, F : 0.80 (Ref: American Mineralogist 1950)

Strunz 9th edition incl. updates

8.BF.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
F: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 < 0.5:1
05:Arrojadit-Gruppe

Lapis Classification

VII/B.20-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
20: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb

Classification by Hölzel

8.BJ.104

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
J: Phosphates, very large: 1+2, Vmed: 2,3
1: Arrojadite-Group

IMA status

anerkannt 2005

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Arrojadite group

Optical Properties

max. Birefringence

0.011
Birefringence chart\! Arrojadite-(KNa) title=Birefringence chart Arrojadite-(KNa)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.664

RI value β

1.670

RI value γ / ε

1.675

Ri mean

1.670

2V angle

Biaxial (-) 86°

Crystallography

Cell parameters a (Å)

24.730

Cell parameters b (Å)

10.057

Cell parameters c (Å)

16.526

Cell parameters a/b or c/a

2.459

Cell parameters c/b

1.643

Cell parameters α

90°

Cell parameters β

105.78

Cell parameters γ

90°

Z

4

Volumne (ų)

3955.3

X-Ray Powder Diffraction

5.86(29), 5.03(28), 3.009(34), 3.050(100), 2.798(25), 2.793(28), 2.777(24), 2.698(71)
XRD chart Arrojadite-(KNa)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.553 (gemessen)

3.563 ( ρ calc. Mineralienatlas )

Instability

+++ verdünnte Säuren

(Co-)Type locality

(Co-)Type locality

Kanada/Yukon-Territorium/Dawson Mining District/Richardson Mountains/Rapid Creek

References

American Mineralogist 84 (1999), 193

IMA group assignments

 
Arrojadite group
 
 
 

 
 
Arrojadite-(BaNa)
BaNa3(NaCa)Fe2+13Al(PO4)11(PO3OH)(OH)
monoklin
C2/c

 
 
Arrojadite-(KFe)
(KNa)Fe2+(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2
monoklin
A2/a

 
 
Arrojadite-(KNa)
KNa3(CaNa2)(Fe2+)13Al(PO4)11(PO3OH)(OH)2
 
 

 
 
Arrojadite-(PbFe)
PbFe2+(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2
monoklin
Cc

 
 
Arrojadite-(SrFe)
SrFe2+(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2
monoklin
 

 
 
Dickinsonite-(BaMn) ?
MaMn3(CaNa3)AlMn13(PO4)12(OH)2
 
 

 
 
Dickinsonite-(KMnNa)
K(NaMn)CaNa3AlMn13(PO4)12(OH)2
monoklin
A2/a

 
 
Fluorarrojadite-(BaFe)
BaFe2+Na2Ca(Fe2+,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2
monoklin
Bb

 
 
Fluorarrojadite-(BaNa)
BaNa4CaFe13Al(PO4)11(PO3OH)F2
monoklin
Cc

 
 
Fluorcarmoite-(BaNa)
Ba☐Na2Na2☐CaMg13Al(PO4)11(PO3OH)F2
monoklin
Cc

 
 
Manganoarrojadite-(KNa)
KNa5MnFe13Al(PO4)11(PO3OH)(OH)2
monoklin
Cc

 
 
Sigismundite
(Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(OH)2(PO4)12
 
 

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Actuality: 20. Mar 2023 - 23:26:10

Other languages

German

Arrojadit-(KNa)

English

Arrojadite-(KNa)

Russian

Арроядит-(KNa)

CNMNC (IMA)-Number

IMA 2005-047

CNMNC symbol

Symbol

Ajd-KNa

Locations with GPS information