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Arrojadite-(SrFe) (IMA 2005-032)

Collectors Summary

Color gelb
Lustre Glasglanz
Crystal System monoklin,

Chemism

Chemical formula

SrFe2+(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2

Additional chem. information

Arrojadit Gruppe

Chemical composition

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

Unit weight: 2157.173754 u; Number of atoms in the formula: 84

Info

Empirical formula:

SrFe(CaNa2)Fe13Al(PO4)11(PO3OH)(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.14

3

3.57

1.0079470

3.0238410

Oxygen

O

37.08

50

59.52

15.9994300

799.9715000

Sodium

Na

2.13

2

2.38

22.9897702

45.9795404

Aluminium

Al

1.25

1

1.19

26.9815382

26.9815382

Phosphorus

P

17.23

12

14.29

30.9737612

371.6851344

Calcium

Ca

1.86

1

1.19

40.0784000

40.0784000

Iron

Fe

36.24

14

16.67

55.8452000

781.8328000

Strontium

Sr

4.06

1

1.19

87.6210000

87.6210000

Analysis wt%

P2O5 : 41.00, Al2O3 : 2.46, FeO : 22.94, MnO : 11.34, MgO : 7.00, CaO : 1.58, SrO : 4.63, BaO : 1.48, Na2O : 4.77, F : 0.82, H2O : 0.92 (Ref: American Mineralogist 2006)

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.20-050

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.162

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

IMA status

2005 anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Arrojadite group

Optical Properties

Color

gelb

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.014

Birefringence chart\! Arrojadite-(SrFe) title=Birefringence chart Arrojadite-(SrFe)

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

1.654

RI value β

1.657

RI value γ / ε

1.668

Ri mean

1.660

2V angle

Biaxial (+) 41° (gemessen) 55° (berechnet)

Absorption

Z > X = Y

Pleochroism

Sehr schwach, farblos bis leicht gelblich

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

16.3992

Cell parameters b (Å)

9.9400

Cell parameters c (Å)

24.4434

Cell parameters a/b or c/a

1.65

Cell parameters c/b

2.459

Cell parameters α

90°

Cell parameters β

105.489°

Cell parameters γ

90°

Z

4

Volume (ų)

3839.762

X-Ray Powder Diffraction

3.3784(26), 3.1925(41), 3.0093(100), 2.8202(24), 2.8050(28), 2.7383(28), 2.6854(70), 2.5291(23)

XRD chart Arrojadite-(SrFe)

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.569 (berechnet)

3.731 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Hålsjöberget (Horrsjöberg)

References

American Mineralogist 84 (1999), 193

IMA group assignments


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

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

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

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

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

 
 
MaMn3(CaNa3)AlMn13(PO4)12(OH)2
 
 

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

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

 
 
BaNa4CaFe13Al(PO4)11(PO3OH)F2
monoklin
Cc

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

 
 
KNa5MnFe13Al(PO4)11(PO3OH)(OH)2
monoklin
Cc

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

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Actuality: 23. Mar 2024 - 09:27:08

Other languages

German

Arrojadit-(SrFe)

English

Arrojadite-(SrFe)

Russian

Арроядит-(SrFe)

CNMNC (IMA)-Number

IMA 2005-032

CNMNC symbol

Symbol

Ajd-SrFe

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 8Qg5C2tSoke_Qx82AYFY_A
GUID (Global unique identifier) 0B3908F1-526B-47A2-BF43-1F36018158FC
Database ID 4358