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Polezhaevaite-(Ce)

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Polezhaevaite-(Ce)
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Polezhaevaite-(Ce)
White mass in matrix, FOV 1 x 0.8 mm ; Koashva quarry, Kola Peninsula, Russia
Copyright: Roberto Bosi; Contribution: Roberto Bosi
Collection: Roberto Bosi
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Berg Koashva/Koashva Grube
Mineral: Polezhaevaite-(Ce)
Image: 1401543447
License: Usage for Mineralienatlas project only
Polezhaevaite-(Ce)

White mass in matrix, FOV 1 x 0.8 mm ; Koashva quarry, Kola Peninsula, Russia
Collection: Roberto Bosi
Copyright: Roberto Bosi
Contribution: Roberto Bosi 2014-05-31
Locality: Koashva Grube / Berg Koashva / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos bis weiß
Streak color weiß
Lustre Seidenglanz (für Aggregate)
Hardness (Mohs) 3~
Cleavages keine
Fracture splittrig
Crystal System hexagonal, P63/m

Chemism

Chemical formula

NaSrCeF6

Additional chem. information

Sr-Ce analog von Gagarinit-(Y)

Chemical composition

Cerium, Natrium, Strontium, Fluor

Unit weight: 364.7172897 u; Number of atoms in the formula: 9

Info

Empirical formula:

NaSrCeF6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Fluorine

F

31.25

6

66.67

18.9984033

113.9904195
Sodium

Na

6.30

1

11.11

22.9897702

22.9897702
Strontium

Sr

24.02

1

11.11

87.6210000

87.6210000
Cerium

Ce

38.42

1

11.11

140.1161000

140.1161000

Strunz 9th edition incl. updates

3.AB.35

3: Halide (Fluoride, Chloride, Bromide, Iodide)
A: Einfache Halogenide ohne H2O
B: M:X = 1:2
35:Gagarinit-Gruppe

Lapis Classification

III/A.08-047

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
A: Einfache Halogenide
8: Wasserfrei, Metall : Halogen = 1:2, 1:3

Classification by Hölzel

3.DA.345

3: HALIDES
D: Complex Halides
A: Without H2O and without Al

IMA status

Anerkannt; Neue Mineralien - IMA WEB Seite - Juni 2009

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos bis weiß

Streak color

weiß

Lustre

Seidenglanz (für Aggregate)

max. Birefringence

0.007
Birefringence chart\! Polezhaevaite-(Ce) title=Birefringence chart Polezhaevaite-(Ce)

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

1.490

RI value γ / ε

1.497

Ri mean

1.492

2V angle

Uniaxial (+)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

6.207

Cell parameters b (Å)

-

Cell parameters c (Å)

3.801

Cell parameters a/b or c/a

0.612

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volume (ų)

126.821

X-Ray Powder Diffraction

5.416(40), 3.120(100), 2.198(70), 1.796(90), 1.554(30), 1.387(30), 1.304(30), 1.173(70)
XRD chart Polezhaevaite-(Ce)

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

Physical Properties

Hardness (Mohs)

3~

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.646 (berechnet) 4.2 (gemessen)

4.775 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

splittrig

Tenacity

duktil (separate Fasern sind elastisch)

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Berg Koashva/Koashva Grube

Preface

Name from

Lyudmila Ivanovna Polezhaeva (geb. 1935), einer russischen Spezialistin für Mikrosonden-Analysen von Mineralen, für ihre Beiträge zur Mineralogie der Alkaligesteine.

Author (Name, Year)

Victor N. Yakovenchuk et al., 2010

References

Victor N. Yakovenchuk, Ekaterina A. Selivanova, Gregory Yu. Ivanyuk, Yakov A. Pakhomovsky, Julia A. Korchak, Alexander P. Nikolaev: Polezhaevaite-(Ce), NaSrCeF6, a new mineral from the Khibiny massif (Kola Peninsula, Russia). American Mineralogist 95 (2010) S.1080-1083.

Neue Mineralien - IMA WEB Seite - Juni 2009

Other languages

German

Polezhaevait-(Ce)

Spanish

Polezhaevaita-(Ce)

English

Polezhaevaite-(Ce)

Russian

Полежаеваит-(Ce)

CNMNC (IMA)-Number

IMA 2009-015

CNMNC symbol

Symbol

Pzv-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) EoBbHAwsPUKD9cDVl0IXFw
GUID (Global unique identifier) 1C5B8012-2C0C-423D-83F5-C0D597421717
Database ID 5214