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Nafertisite (Nafertisit)

Pictures (3 Images total)

Nafertisit
Views (File:
1259944390
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Nafertisit
Größe: 5,6 x 5,4 x 2,4 cm, Fundort: Nanna Pegmatit, Narssârssuk (Narsarsuk), Kitaa, Grönland.
Copyright: Rob Lavinsky; Contribution: thdun5
Location: Grönland/Qaasuitsup Kommunia/Narsaarsuk (Narssârssuk)/Narsaarsuup Qaava/Nanna Pegmatit
Mineral: Nafertisite
Image: 1259944390
Rating: 6.67 (votes: 3)
License: Usage for Mineralienatlas project only
Nafertisit

Größe: 5,6 x 5,4 x 2,4 cm, Fundort: Nanna Pegmatit, Narssârssuk (Narsarsuk), Kitaa, Grönland.

Copyright: Rob Lavinsky
Contribution: thdun5 2009-12-04
Locality: Nanna Pegmatit / Narsaarsuup Qaava / Narsaarsuk (Narssârssuk) / Qaasuitsup Kommunia / Grönland
Nafertisit
Views (File:
1360511507
): 588
Nafertisit
Bildbreite: 6 mm, Fundort: Nanna Pegmatit, Narssarssuk, Kitaa, Qaasuitsup Kommunia, Grönland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Grönland/Qaasuitsup Kommunia/Narsaarsuk (Narssârssuk)/Narsaarsuup Qaava/Nanna Pegmatit
Mineral: Nafertisite
Image: 1360511507
License: Usage for Mineralienatlas project only
Nafertisit

Bildbreite: 6 mm, Fundort: Nanna Pegmatit, Narssarssuk, Kitaa, Qaasuitsup Kommunia, Grönland

Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-10
Locality: Nanna Pegmatit / Narsaarsuup Qaava / Narsaarsuk (Narssârssuk) / Qaasuitsup Kommunia / Grönland
Nafertisit
Views (File:
1442756161
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Nafertisit
Nadelige goldbraune Kristalle, Bb = 0,8 mm. Fundort: Nanna Pegmatit, Narssârssuk (Narsarsuk), Kitaa, Grönland.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A034460, Donator: Hans Niedermeier
Location: Grönland/Qaasuitsup Kommunia/Narsaarsuk (Narssârssuk)/Narsaarsuup Qaava/Nanna Pegmatit
Mineral: Nafertisite
Image: 1442756161
License: Usage for Mineralienatlas project only
Nafertisit (SNr: A034460)

Nadelige goldbraune Kristalle, Bb = 0,8 mm. Fundort: Nanna Pegmatit, Narssârssuk (Narsarsuk), Kitaa, Grönland.

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2015-09-20
Locality: Nanna Pegmatit / Narsaarsuup Qaava / Narsaarsuk (Narssârssuk) / Qaasuitsup Kommunia / Grönland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grün, dunkel grasgrün
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages vollkommen {010},{001}
Fracture fasrig
Crystal System monoklin, A2/m

Chemism

Chemical formula

Na3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2

Chemical composition

Eisen, Natrium, Silicium, Titan, Fluor, Sauerstoff, Wasserstoff

Unit weight: 1793.23466385 u; Number of atoms in the formula: 82

Info

Empirical formula:

Na3Fe10Ti2(Si6O17)2O2(OH)6F(H2O)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.56

10

12.20

1.0079470

10.0794700

Oxygen

O

39.26

44

53.66

15.9994300

703.9749200

Fluorine

F

1.06

1

1.22

18.9984033

18.9984033

Sodium

Na

3.85

3

3.66

22.9897702

68.9693106

Silicon

Si

18.79

12

14.63

28.0855300

337.0263600

Titanium

Ti

5.34

2

2.44

47.8671000

95.7342000

Iron

Fe

31.14

10

12.20

55.8452000

558.4520000

Analysis wt%

Na2O : 4.78, K2O : 1.64, MgO : 1.28, MnO : 0.79, FeO : 21.04, Fe2O3 : 14.53, Al2O3 : 1.32, TiO2 : 8.32, SiO2 : 38.92, H2O : 7.85 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 95)

Strunz 9th edition incl. updates

9.EH.30

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
H: Übergangsstrukturen zwischen Schichtsilikaten und anderen Silikaten
30:Nafertisit-Gruppe

Lapis Classification

VIII/G.13-010

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten

Classification by Hölzel

9.BH.260

9: SILICATES
B: Sorosilicates
H: Rosenbuschite-Lamprophyllite-Group

Dana 8th edition

56.02.06b.03

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
06b: Seidozerite - Lamprophyllite group (Bafertisite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grün, dunkel grasgrün

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.066

Birefringence chart\! Nafertisite title=Birefringence chart Nafertisite

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

1.627

RI value β

1.667

RI value γ / ε

1.693

Ri mean

1.662

2V angle

Biaxial (-) 75° (gemessen) 76° (berechnet)

Orientation

Z ~ a, Y = b, X ^ c = 5°

Dispersion

Moderat, r < v

Absorption

Z > Y >> X

Pleochroism

rötlichbraun zu grün

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

A2/m

Cell parameters a (Å)

5.353

Cell parameters b (Å)

16.176

Cell parameters c (Å)

21.95

Cell parameters a/b or c/a

0.331

Cell parameters c/b

1.357

Cell parameters α

90°

Cell parameters β

94.60°

Cell parameters γ

90°

Z

2

Volume (ų)

1894.531

X-Ray Powder Diffraction

13.0(30),
10.9(100),
4.44(10),
3.638(10),
2.728(20),
2.641(20),
2.547(10),
2.480(10)

XRD chart Nafertisite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.879 (berechnet)

3.143 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {010},{001}

Fracture

fasrig

Tenacity

schneidbar

Preface

Author (Name, Year)

Ferraris & Khomyakov & Soboleva & Belluso & Ivaldi & Pavese, 1994

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 124 (1995) (6), 101

European Journal of Mineralogy 8 (1996), 241

Petersen, O.V., Johnsen, O., Christiansen, C.C., Robinson, G.W. & Niedermayr, G. - Nafertisite - Na3Fe10Ti2Si12(O,OH,F)43 - from the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch für Mineralogie, Monatshefte (1999), 303-310.

REVISED CHEMICAL FORMULA - CNMNC Newsletter No. 22, October 2014, page 1247; Mineralogical Magazine, 78, 1241-1248.

Fernando Cámara, Elena Sokolova, Yassir A. Abdu, Frank C. Hawthorne: Nafertisite, Na3Fe2+ 10Ti2(Si6O17)2O2(OH)6F(H2O)2, from Mt. Kukisvumchorr, Khibiny alkaline massif, Kola peninsula, Russia: Refinement of the crystal structure and revision of the chemical formula. Eur J Mineral Vol. 26, Nr. 5 (2014) S. 689-700.

Other languages

German

Nafertisit

Spanish

Nafertisita

English

Nafertisite

French

Nafertisite

Russian

Нафертисит

Japanese

ナファテサイト

CNMNC (IMA)-Number

IMA 1994-007

CNMNC symbol

Symbol

Naf

Locations with GPS information

IDs

GUSID (Global unique identifier short form) eSRrIf6k1Ui9uMP8mK_V0w
GUID (Global unique identifier) 216B2479-A4FE-48D5-BDB8-C3FC98AFD5D3
Database ID 2650