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Davinciite

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Davinciit
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Davinciit
rötlicher Kristall von Davinciit, Chibiny, Kola, Russland; BB ~ 1,1 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)
Mineral: Davinciite
Image: 1581183611
License: Usage for Mineralienatlas project only
Davinciit

rötlicher Kristall von Davinciit, Chibiny, Kola, Russland; BB 1,1 cm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-08
Locality: Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color dunkel lila
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5
Cleavages fehlt
Fracture muschelig
Solubility Bei Raumtemperatur und erhöhten Temperaturen langsames zersetzen und gelieren in 50% HCl und Salpetersäure.
Crystal System trigonal, R3m

Chemism

Chemical formula

Na12K3Ca6Fe2+3Zr3(Si26O73OH)Cl2

Empirical formula (analysis)

(Na11.75Sr0.29Ba0.03)Σ12.07 (K2.28Na0.72)Σ3 Ca5.99(Fe2.26Mn0.16)Σ2.42 (Zr2.80Ti0.15Hf0.03Nb0.02)Σ3 (Si1.96Al0.04)Σ2 [Si3O9]2[Si9O27]2[(OH)1.42O0.58]Σ2 [Cl1.62(H2O)0.38]Σ2

Additional chem. information

Eudialyt-Gruppe

Chemical composition

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

Unit weight: 3030.095803006 u; Number of atoms in the formula: 130.66

Info

Empirical formula:

(Na11.75Sr0.29Ba0.03)(K2.28Na0.72)Ca5.99(Fe2.26Mn0.16)(Zr2.80Ti0.15Hf0.03Nb0.02)(Si1.96Al0.04)[Si3O9]2[Si9O27]2[(OH)1.42O0.58][Cl1.62(H2O)0.38]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.07

2.18

1.67

1.0079470

2.1973245

Oxygen

O

39.27

74.38

56.93

15.9994300

1,190.0376034

Sodium

Na

9.46

12.47

9.54

22.9897702

286.6824344

Aluminium

Al

0.04

0.04

0.03

26.9815382

1.0792615

Silicon

Si

24.06

25.96

19.87

28.0855300

729.1003588

Chlorine

Cl

1.90

1.62

1.24

35.4532000

57.4341840

Potassium

K

2.94

2.28

1.74

39.0983100

89.1441468

Calcium

Ca

7.92

5.99

4.58

40.0784000

240.0696160

Titanium

Ti

0.24

0.15

0.11

47.8671000

7.1800650

Manganese

Mn

0.29

0.16

0.12

54.9380499

8.7900880

Iron

Fe

4.17

2.26

1.73

55.8452000

126.2101520

Strontium

Sr

0.84

0.29

0.22

87.6210000

25.4100900

Zirconium

Zr

8.43

2.8

2.14

91.2242000

255.4277600

Niobium

Nb

0.06

0.02

0.02

92.9063820

1.8581276

Barium

Ba

0.14

0.03

0.02

137.3277000

4.1198310

Hafnium

Hf

0.18

0.03

0.02

178.4920000

5.3547600

Analysis wt%

Na2O : 12.69, K2O : 3.53, CaO : 11.02, SrO 0.98, BaO : 0.15, FeO : 5.33, MnO : 0.37, Al2O3 : 0.07, SiO2 : 51.20, ТiO2 : 0.39, ZrO2 : 11.33, HfO2 : 0.21, Nb2O5 : 0.09, Cl 1.89, H2O : 0.93, -O=Cl2 : 0.43, Total : 99.75

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.25-042

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

Classification by Hölzel

9.CG.105

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
1: Eudialyte-Group - c=30, Fe- Series

IMA status

anerkannt - CNMNC - New minerals and nomenclature modifications approved in Jun. 2011

Mineral status

anerkanntes Mineral

Optical Properties

Color

dunkel lila

Streak color

weiß

Lustre

Glasglanz

RI value α / ω / n

no = 1,603(2)

RI value γ / ε

ne = 1,605(2)

2V angle

Unaxial (+)

Pleochroism

keiner

Optical Data Luminescence

Luminescence

keine Fluoreszenz

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

14.2956(2)

Cell parameters b (Å)

-

Cell parameters c (Å)

30.0228(5)

Cell parameters a/b or c/a

2.1

Cell parameters c/b

-

Z

3

Volumne (ų)

5313.572

Kristall structure

Struktur bestimmt

X-Ray Powder Diffraction

6.415(54), 5.720(36), 4.309(66), 3.207(63), 3.162(43), 2.981(100), 2.860(96), 2.595(37)

XRD chart Davinciite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

Density (g/cm³)

2.82(2) (gemessen) 2.848 (berechnet)

2.841 ( ρ calc. Mineralienatlas )

Cleavages

fehlt

Fracture

muschelig

Tenacity

spröde

Instability

Bei Raumtemperatur und erhöhten Temperaturen langsames zersetzen und gelieren in 50% HCl und Salpetersäure.

(Co-)Type locality

(Co-)Type locality

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

Type material

Fersman mineralogisches Museum, Russische Akademie der Wissenschaften, Moskau, Russland

Collection number of type material

3846

Preface

Author (Name, Year)

Khomyakov, A. P., Nechelyustov, G.N., Rastsvetaeva, R. K. and Rozenberg, K.A. (2011)

References

Khomyakov, A.P., Nechelyustov, G.N., Rastsvetaeva, R.K. and Rozenberg, K.A. (2011) Davinciite, IMA 2011-019. CNMNC Newsletter No. 10, October 2011, page 2552;

Хомяков А.П., Нечелюстов Г.Н., Расцветаева Р.К., Розенберг К.А. (2012). Давинчиит Nа12К3Са6Fе2+3Zr3(Si26O73OH)Cl2-новый K,Na-упорядоченный минерал группы эвдиалита из Хибинского щелочного массива, Кольский полуостров // Записки РМО, 2012, №2, с.10-21

Other languages

German

Davinciit

English

Davinciite

Russian

Давинчиит

CNMNC (IMA)-Number

IMA 2011-019

CNMNC symbol

Symbol

Dvc

Locations with GPS information