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Sahamalite-(Ce)

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Sahamalith-(Ce)
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Sahamalith-(Ce)

beige Krusten von Sahamalith-(Ce), Mountain Pass Mine, Mountain Pass, San Bernardino County, California, USA; BB 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-16
Locality: Mountain Pass Mine / Ivanpah / Mountain Pass District / San Bernardino Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Solubility +++ Säuren
Crystal System monoklin, P21/a

Chemism

Chem­ical formula

(Mg,Fe2+)Ce2(CO3)4

Chem­ical com­po­si­tion

Cerium, Eisen, Magnesium, Kohlenstoff, Sauerstoff

Unit weight: 552.458575 u; Number of atoms in the formula: 19

Info

Empirical formula:

(Mg0.75Fe0.25)Ce2(CO3)4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

8.70

4

21.05

12.0107800

48.0431200

Oxygen

O

34.75

12

63.16

15.9994300

191.9931600

Magnesium

Mg

3.30

0.75

3.95

24.3050600

18.2287950

Iron

Fe

2.53

0.25

1.32

55.8452000

13.9613000

Cerium

Ce

50.72

2

10.53

140.1161000

280.2322000

Anal­y­sis wt%

Ce2O3 : 31.40, La2O3 : 17.80, Nd2O3 : 7.10, Pr2O3 : 2.40, Sm2O3 : 0.60, MgO : 6.10, FeO : 2.00, CO2 : 31.70, Ln2O3 : 59.20 (Ref: American Mineralogist 53)

Strunz 9th edi­tion incl. updates

5.AD.05

5: Carbonate (Carbonate, Nitrate)
A: Carbonate ohne weitere Anionen, ohne H2O
D: Mit Seltenerden(REE)-Elementen
05:Hydromagnesit-Gruppe

Lapis Clas­sifica­tion

V/B.06-010

V: NITRATE, CARBONATE UND BORATE
B: Wasserfreie Carbonate [CO3] 2-, ohne fremde Anionen

Clas­sifica­tion by Hölzel

5.AC.260

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
A: Carbonates (-Anions -Water)
C: Carbonates: orthorhombic or monoclinic
2: Double Carbonates

Dana 8th edi­tion

14.04.02.01

14: Anhydrous Carbonates
04: Anhydrous Carbonates with Compound Formula A+2 B++2 (CO3)4

IMA sta­tus

anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefrin­gence

0.128

Birefringence chart\! Sahamalite-(Ce) title=Birefringence chart Sahamalite-(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

1.679

RI value β

1.776

RI value γ / ε

1.807

Ri mean

1.754

2V angle

Biaxial (-) 57°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell param­e­ters a (Å)

5.92

Cell param­e­ters b (Å)

16.21

Cell param­e­ters c (Å)

4.63

Cell param­e­ters a/b or c/a

0.365

Cell param­e­ters c/b

0.286

Cell param­e­ters α

90°

Cell param­e­ters β

106.75

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

425.458

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.3

4.312 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Jaffe, H.W. et al (1953)

References

American Mineralogist 38 (1953) 721-754

Other languages

Spanish

Sahamalita-(Ce)

French

Sahamalite-(Ce)

English

Sahamalite-(Ce)

German

Sahamalith-(Ce)

Russian

Сахамалит-(Ce)

CNMNC symbol

Symbol

Shm-Ce

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Sahamalith-(Ce)
Google-Bilder-Suche - search for: Sahamalith-(Ce)
Mineralienatlas.de (Forum) - search for: Sahamalith-(Ce)

English pages

Mindat - search for: Sahamalite-(Ce)
Webmineral - search for:Sahamalite-(Ce)
Handbook-of-Mineralogy - search for: Sahamalite-(Ce)
RRUFF - Raman, XRD and other mineral data - search for: Sahamalite-(Ce)
RRUFF - References and PDF downloads - search for: Sahamalite-(Ce)
American-Mineralogist-Crystal-Structure-Database - search for: Sahamalite-(Ce)
Strahlen.org - search for: Sahamalite-(Ce)

Russian pages

Webmineral.ru - search for: Сахамалит-(Ce)

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Sahamalith-(Ce)
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Locations with GPS information