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Zvyaginite

Pictures (1 Images total)

Zvyaginite
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Zvyaginite
Carsten Slotta/mintreasure.com specimen, photo Joachim Esche ID by M. Murashko modified Wild M420 photomacroscope with apozoom and Canon EOS 550D; Locality: Malyi Punkaruaiv Mountain, Lovozersky District, Murmansk Oblast, Russia; Fov: 4.1 mm; 2016
Copyright: Joachim Esche; Contribution: Stefan
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Malyi Punkaruaiv
Mineral: Zvyaginite
Image: 1570550991
License: Usage for Mineralienatlas project only
Zvyaginite

Carsten Slotta/mintreasure.com specimen, photo Joachim Esche ID by M. Murashko modified Wild M420 photomacroscope with apozoom and Canon EOS 550D; Locality: Malyi Punkaruaiv Mountain, Lovozersky Di...

Copyright: Joachim Esche
Contribution: Stefan 2019-10-08
Locality: Malyi Punkaruaiv / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos, perlweiß, cremig, gelblich-braun, rosa, lila-pink
Streak color weiß
Lustre Perlglanz (Kristallflächen), Fettglanz (Bruchflächen)
Hardness (Mohs) 2 - 3
Crystal System triklin, P1
Morphology rechteckige, unregelmäßig begrenzte, mm dünne Täfelchen bis 2x1cm Größe mit {001} als Hauptform

Chemism

Chemical formula

NaZnNb2Ti[Si2O7]2O(OH,F)3(H2O)4+x {x < 1}

Chemical composition

Natrium, Niob, Silicium, Titan, Zink, Fluor, Sauerstoff, Wasserstoff

Unit weight: 817.0046248875 u; Number of atoms in the formula: 44.25

Info

Empirical formula:

NaZnNb2Ti[Si2O7]2O((OH)0.75F0.25)3(H2O)5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.51

12.25

27.68

1.0079470

12.3473508

Oxygen

O

43.57

22.25

50.28

15.9994300

355.9873175

Fluorine

F

1.74

0.75

1.69

18.9984033

14.2488024

Sodium

Na

2.81

1

2.26

22.9897702

22.9897702

Silicon

Si

13.75

4

9.04

28.0855300

112.3421200

Titanium

Ti

5.86

1

2.26

47.8671000

47.8671000

Zinc

Zn

8.01

1

2.26

65.4094000

65.4094000

Niobium

Nb

22.74

2

4.52

92.9063820

185.8127640

Analysis wt%

Na2O: 4.74,
K2O: 0.22,
CaO: 0.77,
MnO: 1.36,
FeO: 0.24,
ZnO: 9.61,
Al2O3: 0.19,
SiO2: 29.42,
TiO2: 12.33,
Nb2O5: 27.22,
F: 1.94,
H2O: 12.65,
-O = F2 -0.82,
Total: 99.87

Strunz 9th edition incl. updates

9.BE.30

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
30:Epistolit-Gruppe

Lapis Classification

VIII/C.14-045

VIII: SILIKATE
C: Gruppensilikate
14: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Reihe Murmanit-Lomonosovit

IMA status

anerkannt - CNMNC Newsletter No. 18, December 2013

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Seidozerite supergroup  ⇒ Lamprophyllite group

Optical Properties

Color

farblos, perlweiß, cremig, gelblich-braun, rosa, lila-pink

Streak color

weiß

Diaphaneity (Transparency)

transparent, durchscheinend

Lustre

Perlglanz (Kristallflächen), Fettglanz (Bruchflächen)

max. Birefringence

0.114

Birefringence chart\! Zvyaginite title=Birefringence chart Zvyaginite

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

nα = 1.626(5)

RI value β

nβ = 1.714(3)

RI value γ / ε

nγ = 1.740(5)

2V angle

Biaxial (-); 45(15)° (gemessen), 55° (berechnet)

Optical Data Luminescence

Luminescence

keine Fluoreszenz unter UV

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

8.975

Cell parameters b (Å)

8.979

Cell parameters c (Å)

12.135

Cell parameters a/b or c/a

1

Cell parameters c/b

1.351

Cell parameters α

74.328°

Cell parameters β

80.651°

Cell parameters γ

73.959°

Z

2

Volume (ų)

900.819

Crystal structure

Struktur bestimmt; Epistolit-Gruppe

X-Ray Powder Diffraction

11.72(100), 5.83(40), 5.28(53), 4.289(86), 3.896(36), 2.916(57), 2.862(72), 1.782(24)

XRD chart Zvyaginite

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

Morphology

rechteckige, unregelmäßig begrenzte, mm dünne Täfelchen bis 2x1cm Größe mit {001} als Hauptform

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2 - 3

Density (g/cm³)

2.88

3.012 ( ρ calc. Mineralienatlas )

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Malyi Punkaruaiv/Pegmatit Nr. 71

Type material

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moskau, Russland

Collection number of type material

4416/1

Preface

Name from

Der Name ehrt den russischen Kristallographen, Kristallchemiker und Physiker Boris B. Zvyagin (1921-2002)

Author (Name, Year)

I. V. Pekov, I. S. Lykova, N. V. Chukanov, V. O. Yapaskurt, D. I. Belakovskiy, A. A. Zolotarev, N. V. Zubkova (2014)

References

Pekov, I.V., Lykova, I.S., Chukanov, N. V . , Yapaskurt , V.O., Belakovskiy, D.I., Zolotarev, A.A. und Zubkova, N.V. (2013) Zvyaginite, IMA 2013-071. CNMNC Newsletter No. 18, December 2013, page 3251; Mineralogical Magazine, 77, 3249-3258.

Pekov, I.V., Lykova, I.S., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Zolotarev, A.A., Jr., Zubkova, N.V. - Zvyaginite NaZnNb2Ti[Si2O7]2O(OH,F)3(H2O) 4+x(х<1) a new mineral of epistolite group from Lovozero alkaline massif (Kola Peninsula, Russia). Zapiski RMO, 143 (2014), 45-63.

I. V. Pekov, I. S. Lykova, N. V. Chukanov, V. O. Yapaskurt, D. I. Belakovskiy, A. A. Zolotarev, N. V. Zubkova: Zvyaginite, NaZnNb2Ti[Si2O7]2O(OH,F)3(H2O)4 + x (x < 1), a new mineral of the epistolite group from the Lovozero Alkaline Pluton, Kola Peninsula, Russia. Geology of Ore Deposits Vol. 56, Issue 8 (2014) S. 644–656.

IMA group assignments

Other languages

German

Zvyaginit

English

Zvyaginite

Russian

Звягинит

CNMNC (IMA)-Number

IMA 2013-071

CNMNC symbol

Symbol

Zvy

IDs

GUSID (Global unique identifier short form) T3cm27dylUKK-7m183gLWg
GUID (Global unique identifier) DB26774F-72B7-4295-8AFB-B9B5F3780B5A
Database ID 7697