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Rastsvetaevite (Rastsvetaevit)

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Rastsvetaevit
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Rastsvetaevit
Bildbreite: 3 mm, Fundort: Rasvumchorr, Chibiny-Massiv, Kola-Halbinsel, Russland
Copyright: Leonardus; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Rasvumchorr
Mineral: Rastsvetaevite
Image: 1360588619
License: Usage for Mineralienatlas project only
Rastsvetaevit

Bildbreite: 3 mm, Fundort: Rasvumchorr, Chibiny-Massiv, Kola-Halbinsel, Russland
Copyright: Leonardus
Contribution: thdun5 2013-02-11
Locality: Rasvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Hardness (Mohs) 5.5
Fracture muschelig
Crystal System trigonal, R3m

Chemism

Chemical formula

Na27K8Ca12Fe3Zr6Si52O144(OH,O)6Cl2

Chemical composition

Calcium, Chlor, Eisen, Natrium, Silicium, Zirconium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 6065.1360969 u; Number of atoms in the formula: 264.5

Info

Empirical formula:

Na27K8Ca12Fe3Zr6Si52O144((OH)0.75O0.25)6Cl2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.07

4.5

1.70

1.0079470

4.5357615
Oxygen

O

39.57

150

56.71

15.9994300

2,399.9145000
Sodium

Na

10.23

27

10.21

22.9897702

620.7237954
Silicon

Si

24.08

52

19.66

28.0855300

1,460.4475600
Chlorine

Cl

1.17

2

0.76

35.4532000

70.9064000
Potassium

K

5.16

8

3.02

39.0983100

312.7864800
Calcium

Ca

7.93

12

4.54

40.0784000

480.9408000
Iron

Fe

2.76

3

1.13

55.8452000

167.5356000
Zirconium

Zr

9.02

6

2.27

91.2242000

547.3452000

Analysis wt%

SiO2 : 50.42, ZrO2 : 11.48, FeO : 2.73, MnO : 0.49, CaO : 10.37, SrO : 1.26, Na2O : 13.76, K2O : 6.12, Cl : 1.33, H2O : 0.89 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2006)

Strunz 9th edition incl. updates

9.CO.10

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

Lapis Classification

VIII/E.25-090

VIII: SILIKATE
E: Ringsilikate
25: Neunerringe + Dreierringe; Eudialyt-Gruppe

Classification by Hölzel

9.CG.330

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
3: Eudialyte-Subgroup - c=60 Series

Dana 8th edition

64.01.01.10

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
01: Eudialyte Group

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Eudialyte group

Optical Properties

max. Birefringence

0.002
Birefringence chart\! Rastsvetaevite title=Birefringence chart Rastsvetaevite

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

1.598

RI value γ / ε

1.600

Ri mean

1.599

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

14.249

Cell parameters b (Å)

-

Cell parameters c (Å)

60.969

Cell parameters a/b or c/a

4.279

Cell parameters c/b

-

Z

3

Volumne (ų)

10720.338

X-Ray Powder Diffraction

2.987(100),
4.345(81),
2.861(70),
3.249(57),
6.48(47),
3.565(41),
2.695(40)
XRD chart Rastsvetaevite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.86 (gemessen) 2.84 (berechnet)

2.818 ( ρ calc. Mineralienatlas )

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Rasvumchorr

References

Khomyakov, A.P., Nechelyustov, G.N., Arakcheeva, A.V. (2006): Rastsvetaevite, Na27K8Ca12Fe3Zr6Si4[Si3O9]4[Si9O27]4(O,OH,H2O)6Cl2, a new mineral with a modular eudialyte-like structure and crystal-chemical systematics of the eudialyte group. Proceedings of the Russian Mineralogical Society, 135(1), 49-65.

IMA group assignments

Other languages

German

Rastsvetaevit

English

Rastsvetaevite

Russian

Расцветаеваит

CNMNC (IMA)-Number

IMA 2000-028

CNMNC symbol

Symbol

Rvt

Locations with GPS information