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Unnamed (Eudialyte 3248)

Collectors Summary

Crystal System trigonal, R3m

Chemism

Chem­ical formula

Na29Ca12Zr6[Si48O132(O,OH)12]{[Na]4[Si]2}{[Mn]3[Mn,Nb,Ti]2}(OH,H2O,Cl)10

Empir­ical formula (anal­y­sis)

Na94-102.4K1.5-1.92Sr3.2-3.8Ba0.37Ce2.5-2.9Y0.93-1.20Al0.12-0.18Ca25.9-27.9Zr16.8-18.1Hf0.09-0.15Fe0.96-1.26Mn8.2-11.2Ti1.08-1.35Nb1.29-1.44Si152.9-154.8S1

Chem­ical com­po­si­tion

Calcium, Chlor, Mangan, Natrium, Niob, Silicium, Titan, Zirconium, Sauerstoff, Wasserstoff

Unit weight: 10991.70201031 u; Number of atoms in the formula: 320.57

Info

Empirical formula:

Na98.2K1.7Sr3.5Ba0.37Ce2.7Y1.1Al0.2Ca26.9Zr17.5Hf0.1Fe1.1Mn9.7Ti1.2Nb1.4Si153.9S

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sodium

Na

20.54

98.2

30.63

22.9897702

2,257.5954336

Aluminium

Al

0.05

0.2

0.06

26.9815382

5.3963076

Silicon

Si

39.32

153.9

48.01

28.0855300

4,322.3630670

Sulfur

S

0.29

1

0.31

32.0655000

32.0655000

Potassium

K

0.60

1.7

0.53

39.0983100

66.4671270

Calcium

Ca

9.81

26.9

8.39

40.0784000

1,078.1089600

Titanium

Ti

0.52

1.2

0.37

47.8671000

57.4405200

Manganese

Mn

4.85

9.7

3.03

54.9380499

532.8990840

Iron

Fe

0.56

1.1

0.34

55.8452000

61.4297200

Strontium

Sr

2.79

3.5

1.09

87.6210000

306.6735000

Yttrium

Y

0.89

1.1

0.34

88.9058520

97.7964372

Zirconium

Zr

14.52

17.5

5.46

91.2242000

1,596.4235000

Niobium

Nb

1.18

1.4

0.44

92.9063820

130.0689348

Barium

Ba

0.46

0.37

0.12

137.3277000

50.8112490

Cerium

Ce

3.44

2.7

0.84

140.1161000

378.3134700

Hafnium

Hf

0.16

0.1

0.03

178.4920000

17.8492000

Strunz 9th edi­tion incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

IMA Classification

IMA Clas­sifica­tion

Eudialyte group

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell param­e­ters a (Å)

14.179(1)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

60.67(1)

Cell param­e­ters a/b or c/a

4.279

Cell param­e­ters c/b

-

Volumne (ų)

10563.208

References

R.K. Rastsvetayeva, A.G. Ivanova and A.P. Khomyakov (2006): Modular structure of hypermanganese eudialyte. Dokl. Akad. Nauk. 410, 101-105 (in Russian); Dokl. Earth Sci., 410, 1075-1079 (English version). [Abstract in American Mineralogist, 92, 1539-1542.]

IMA group assignments

Other languages

German

Unbenamt (Eudialyte 3248)

English

Unnamed (Eudialyte 3248)

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