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Laptevite-(Ce)

Pictures (3 Images total)

Laptevite-(Ce)
Views (File:
1441873615
): 477
Laptevite-(Ce)
Locality: Gere-Su river, Matcha massif, Zeravshan range, Osh Oblast, Kyrgyzstan; 7x7 mm grain of greyish Laptevite-(Ce) between bronze plates of Astrophyllite. Black mineral is Aegirine-Diopside partially replaced with more later pure green Aegirine. Collected by Leonid A.Pautov. Pavel M. Kartashov collection and scan.
Copyright: Pavel M. Kartashov; Contribution: Stefan
Location: Kirgistan/Osch (Osh), Oblast/Zeravshan-Gebirge/Gere-Su, Fluss
Mineral: Laptevite-(Ce)
Image: 1441873615
License: Usage for Mineralienatlas project only
Laptevite-(Ce)

Locality: Gere-Su river, Matcha massif, Zeravshan range, Osh Oblast, Kyrgyzstan; 7x7 mm grain of greyish Laptevite-(Ce) between bronze plates of Astrophyllite. Black mineral is Aegirine-Diopside pa...

Copyright: Pavel M. Kartashov
Contribution: Stefan 2015-09-10
Locality: Gere-Su, Fluss / Zeravshan-Gebirge / Osch (Osh), Oblast / Kirgistan
Laptevite-(Ce)
Views (File:
1441873799
): 446
Laptevite-(Ce)
Locality: Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan; Bipyramidal crystals of greenish-grey to brownish Laptevite-(Ce) cotype specimen. Associating minerals are orange Bafertisite, greenish grains of Aegirine and white granular Quartz-Albite aggregate. Specimen size is 2.5x2 cm. Collected by Atali Agakhanov. Pavel M. Kartashov collection and scan.
Copyright: Pavel M. Kartashov; Contribution: Stefan
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Laptevite-(Ce)
Image: 1441873799
License: Usage for Mineralienatlas project only
Laptevite-(Ce)

Locality: Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan; Bipyramidal crystals of greenish-grey to brownish Laptev...

Copyright: Pavel M. Kartashov
Contribution: Stefan 2015-09-10
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan
Laptevite-(Ce)
Views (File:
1441874026
): 595
Laptevite-(Ce)
Locality: Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan; Bipyramidal crystals of greenish-grey to brownish Laptevite-(Ce) cotype specimen. Associating minerals are orange Bafertisite plate and white granular Quartz-Albite aggregate. FOV is 1x0.8 cm. Collected by Atali Agakhanov. Pavel M. Kartashov collection and scan.
Copyright: Pavel M. Kartashov; Contribution: Stefan
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Laptevite-(Ce)
Image: 1441874026
License: Usage for Mineralienatlas project only
Laptevite-(Ce)

Locality: Darai-Pioz Glacier (Dara-i-Pioz; Dara-Pioz), Alai Range (Alayskiy), Tien Shan Mtn, Region of Republican Subordination, Tajikistan; Bipyramidal crystals of greenish-grey to brownish Laptev...

Copyright: Pavel M. Kartashov
Contribution: Stefan 2015-09-10
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan

Collectors Summary

Color grünlichgrau, hellbraun
Lustre Glasglanz, Fettglanz
Crystal System trigonal, R3m

Chemism

Chemical formula

NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11

Empirical formula (analysis)

(Fe2+0.58Mn0.31Ti0.10Zr0.02)Σ1.01 [(Ce2.80La2.22Nd0.79Pr0.46Dy0.21Gd0.20Sm0.15Yb0.05Tb0.03Eu0.02Tm0.02)Σ6.95 Ca5.52Y2.60Na0.83Sr0.37U4+0.07Th0.04]Σ16.38 Si6.78B3.54P0.54O36.39F11.61

Additional chem. information

Strukturmäßig verwandt mit der Okanoganit-Vicanit-Gruppe

Chemical composition

Calcium, Eisen, Natrium, Silicium, Yttrium, Bor, Fluor, Phosphor, Sauerstoff, REE

Unit weight: 2621.5076499455 u; Number of atoms in the formula: 76.25

Info

Empirical formula:

(Fe0.58Mn0.31Ti0.10Zr0.02)[(Ce2.80La2.22Nd0.79Pr0.46Dy0.21Gd0.20Sm0.15Yb0.05Tb0.03Eu0.02Tm0.02)Ca5.52Y2.60Na0.83Sr0.37U0.07Th0.04]Si6.78B3.54P0.54O36.39F11.61

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Boron

B

1.46

3.54

4.64

10.8117000

38.2734180

Oxygen

O

22.21

36.39

47.72

15.9994300

582.2192577

Fluorine

F

8.41

11.61

15.23

18.9984033

220.5714617

Sodium

Na

0.73

0.83

1.09

22.9897702

19.0815093

Silicon

Si

7.26

6.78

8.89

28.0855300

190.4198934

Phosphorus

P

0.64

0.54

0.71

30.9737612

16.7258310

Calcium

Ca

8.44

5.52

7.24

40.0784000

221.2327680

Titanium

Ti

0.18

0.1

0.13

47.8671000

4.7867100

Manganese

Mn

0.65

0.31

0.41

54.9380499

17.0307955

Iron

Fe

1.24

0.58

0.76

55.8452000

32.3902160

Strontium

Sr

1.24

0.37

0.49

87.6210000

32.4197700

Yttrium

Y

8.82

2.6

3.41

88.9058520

231.1552152

Zirconium

Zr

0.07

0.02

0.03

91.2242000

1.8244840

Lanthanum

La

11.76

2.22

2.91

138.9055200

308.3702544

Cerium

Ce

14.97

2.8

3.67

140.1161000

392.3250800

Praseodymium

Pr

2.47

0.46

0.60

140.9076520

64.8175199

Neodymium

Nd

4.35

0.79

1.04

144.2430000

113.9519700

Samarium

Sm

0.86

0.15

0.20

150.3630000

22.5544500

Europium

Eu

0.12

0.02

0.03

151.9641000

3.0392820

Gadolinium

Gd

1.20

0.2

0.26

157.2530000

31.4506000

Terbium

Tb

0.18

0.03

0.04

158.9253420

4.7677603

Dysprosium

Dy

1.30

0.21

0.28

162.5001000

34.1250210

Thulium

Tm

0.13

0.02

0.03

168.9342120

3.3786842

Ytterbium

Yb

0.33

0.05

0.07

173.0430000

8.6521500

Thorium

Th

0.35

0.04

0.05

232.0381100

9.2815244

Uranium

U

0.64

0.07

0.09

238.0289130

16.6620239

Strunz 9th edition incl. updates

9.AJ.35

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
J: Insel(Neso)silikate mit BO3 Triangeln und /oder B[4], Be[4] Tetraedern, eckenteilend mit SiO4
35:Vicanit-Gruppe

Lapis Classification

VIII/B.33-027

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
33: Kationen mit Koordinationszahlen zwischen [8] und [12]; Beryllium- und Bor-Inselsilikate

Classification by Hölzel

9.AK.545

9: SILICATES
A: Nesosilicates
K: Boro and Beryllo Nesosilicates
5: C large

IMA status

anerkannt - CNMNC - Neue Mineralien Dezember 2011

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlichgrau, hellbraun

Lustre

Glasglanz, Fettglanz

RI value α / ω / n

ω = 1.741(3)

RI value γ / ε

ε = 1.720(3)

2V angle

Uniaxial(-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

10.804

Cell parameters b (Å)

-

Cell parameters c (Å)

27.726

Cell parameters a/b or c/a

2.566

Cell parameters c/b

-

Z

3

Volume (ų)

2802.767

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

4.41(29), 3.13(26), 3.03(100), 2.982(85), 2.954(60), 2.689(40), 1.797(31), 1.770(21)

XRD chart Laptevite-(Ce)

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

Crystals 3D

Open larger view

Physical Properties

VHN (Hardness Vickers)

443 - 485 (50g)

Density (g/cm³)

4.61(2) (gemessen) 4.660 (berechnet)

4.659 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)

Type material

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia

Collection number of type material

4195/1

Preface

Name from

Tatyana Mikhailovna Lapteva, einer russchen Geologin und Petrologin, die sich mit der Geologie in Zentralasien beschäftigte

Author (Name, Year)

A.A. Agakhanov, L.A. Pautov, Yu.A. Uvarova, E.V. Sokolova, F.C. Hawthorne, and V.Yu. Karpenko (2013)

References

CNMNC Newsletter No. 12, February 2012, page 152; Mineralogical Magazine, 76, 151-155.

A.A. Agakhanov, L.A. Pautov, Yu.A. Uvarova, E.V. Sokolova, F.C. Hawthorne, and V.Yu. Karpenko: Laptevite-(Ce) NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11—a new vicanite-group mineral from Darai-Pioz alkaline massif. Novye dannye o mineralakh (New data on minerals) Vol. 48 (2013) S. 5–11. (in Russ.)

Uvarova, Y.A., Sokolova, E., Hawthorne, F.C., Agakhanov, A.A., Karpenko, V.Y., Pautov, L.A. - The crystal structure of laptevite-(Ce), NaFe2+(REE7Ca5Y3)(SiO4)4(Si3B2PO18)(BO3)F11, a new mineral species from the Darai-Pioz alkaline massif, Northern Tajikistan. Zeitschrift für Kristallographie - Crystalline Materials, 228 (2013), 550-557.

Fernando Cámara, G. Diego Gatta, Yulia Uvarova, Olivier C. Gagne, and Dmitriy I. Belakovskiy: New Mineral Names. American Mineralogist Vol. 99, Nr. 10 (2014) S. 2150-2158.

Other languages

German

Laptevit-(Ce)

English

Laptevite-(Ce)

Russian

Лаптевит-(Ce)

Ukrainian

Лаптевит-(Ce)

CNMNC (IMA)-Number

IMA 2011-081

CNMNC symbol

Symbol

Lpt-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Gnifeu0DSEqE8NuhrJZ42Q
GUID (Global unique identifier) 7A9F781A-03ED-4A48-84F0-DBA1AC9678D9
Database ID 7173