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Gagarinite-(Ce)

Collectors Summary

Color farblos, blassrosa, orange
Streak color weiß
Hardness (Mohs) 3.5
Cleavages keine
Fracture muschelig
Solubility ++ heiße HCl, - kalte verdünnte HCl, H2O
Crystal System trigonal, P3

Chemism

Chemical formula

NaCaCeF6

Chemical composition

Calcium, Cerium, Natrium, Fluor

Unit weight: 317.1746897 u; Number of atoms in the formula: 9

Info

Empirical formula:

NaCaCeF6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Fluorine

F

35.94

6

66.67

18.9984033

113.9904195
Sodium

Na

7.25

1

11.11

22.9897702

22.9897702
Calcium

Ca

12.64

1

11.11

40.0784000

40.0784000
Cerium

Ce

44.18

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.08-045

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

Classification by Hölzel

3.DA.360

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

Dana 8th edition

11.05.07.01

11: Halide Complexes; Alumino-fluorides
05: Halide Complexes; Alumino-fluorides where (A)m B (X)6

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, blassrosa, orange

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.020
Birefringence chart\! Gagarinite-(Ce) title=Birefringence chart Gagarinite-(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

1.483

RI value γ / ε

1.503

Ri mean

1.490

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

147

Space Group

P3

Cell parameters a (Å)

6.099

Cell parameters b (Å)

-

Cell parameters c (Å)

11.064

Cell parameters a/b or c/a

1.814

Cell parameters c/b

-

Z

3

Volume (ų)

356.418

X-Ray Powder Diffraction

5.29(70),
3.036(100),
2.351(30),
2.146(70),
1.757(80),
1.361(30),
1.152(40),
0.919(40)
XRD chart Gagarinite-(Ce)

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)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.49 (gemessen)

4.433 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

Instability

++ heiße HCl, - kalte verdünnte HCl, H2O

(Co-)Type locality

(Co-)Type locality

Kanada/Neufundland und Labrador/Labrador/Strange Lake Complex

Preface

Name from

Für Yuri Gagarin (1934-1968), der erste russische Cosmonaut. Originalname: Zajacit-(Ce) für Dr. Ihor Stephan Zajac (1935- ) führender Geologe der Erforschungsgruppe der Strange Lake-Lagerstätte und der das Mineral als erster entdeckte.

Author (Name, Year)

Jambor & Roberts & Owens & Grice, 1996

References

Canadian Mineralogist 34 (1996), 1299

Other languages

German

Gagarinit-(Ce)

Spanish

Gagarinita-(Ce)

English

Gagarinite-(Ce)

French

Gagarinite-(Ce)

Russian

Гагаринит-(Ce)

Alternative Name

German

Zajacit-(Ce)

Spanish

Zajacita-(Ce)

English

Zajacite-(Ce)

French

Zajacite-(Ce)

CNMNC (IMA)-Number

IMA 1993-038

CNMNC symbol

Symbol

Gag-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) LQN4P4AMz0G3Q4jL6UZt4A
GUID (Global unique identifier) 3F78032D-0C80-41CF-B743-88CBE9466DE0
Database ID 4258