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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

Volume (ų)

5313.572

Crystal 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)

Crystals 3D

Open larger view

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

Paragenesis of type material

Nephelin, Sodalith, K-Feldspat, Delhayelit, Aegirin, Shcherbakovie, Villiaumit, Nitrit, Nacaphit, Rasvumit, Djerfisherit

Preface

Name from

Leonardo da Vinci (1452–1519), italienischer Wissenschaftler, Maler, Bildhauer und Architekt

Author (Name, Year)

Khomyakov, A. P., Nechelyustov, G.N., Rastsvetaeva, R. K. and Rozenberg, K.A. (2013)

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.

A. P. Khomyakov , G. N. Nechelyustov , R. K. Rastsvetaeva, K. A. Rozenberg: Davinciite, Na12K3Ca6Fe 3 2+ Zr3(Si26O73OH)Cl2, a New K,Na-Ordered mineral of the eudialyte group from the Khibiny Alkaline Pluton, Kola Peninsula, Russia. Geology of Ore Deposits Vol. 55, Issue 7 (2013) S. 532–540.

Other languages

German

Davinciit

English

Davinciite

Russian

Давинчиит

CNMNC (IMA)-Number

IMA 2011-019

CNMNC symbol

Symbol

Dvc

Locations with GPS information

IDs

GUSID (Global unique identifier short form) HSorVz1JfUCn5YT7UC3MDw
GUID (Global unique identifier) 572B2A1D-493D-407D-A7E5-84FB502DCC0F
Database ID 7069