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Rémondite-(La)

Collectors Summary

Color orange-met.
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 3
Cleavages keine
Fracture muschelig
Solubility +++ HCl, HNO3
Crystal System monoklin, P21

Chemism

Chemical formula

Na3(La,Ca,Na)3(CO3)5

Empirical formula (analysis)

Na2.87(La0.80Ce0.68Ca0.61Na0.46Sr0.18Nd0.09K0.08Pr0.04Th0.03Sm0.01Ba0.01)(CO3)5

Chemical composition

Calcium, Lanthanum, Natrium, Kohlenstoff, Sauerstoff

Unit weight: 654.808343946 u; Number of atoms in the formula: 25.86

Info

Empirical formula:

Na2.87(La0.80Ce0.68Ca0.61Na0.46Sr0.18Nd0.09K0.08Pr0.04Th0.03Sm0.01Ba0.01)(CO3)5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

9.17

5

19.33

12.0107800

60.0539000

Oxygen

O

36.65

15

58.00

15.9994300

239.9914500

Sodium

Na

11.69

3.33

12.88

22.9897702

76.5559348

Potassium

K

0.48

0.08

0.31

39.0983100

3.1278648

Calcium

Ca

3.73

0.61

2.36

40.0784000

24.4478240

Strontium

Sr

2.41

0.18

0.70

87.6210000

15.7717800

Barium

Ba

0.21

0.01

0.04

137.3277000

1.3732770

Lanthanum

La

16.97

0.8

3.09

138.9055200

111.1244160

Cerium

Ce

14.55

0.68

2.63

140.1161000

95.2789480

Praseodymium

Pr

0.86

0.04

0.15

140.9076520

5.6363061

Neodymium

Nd

1.98

0.09

0.35

144.2430000

12.9818700

Samarium

Sm

0.23

0.01

0.04

150.3630000

1.5036300

Thorium

Th

1.06

0.03

0.12

232.0381100

6.9611433

Analysis wt%

La2O3 : 19.75, Ce2O3 : 16.67, Pr2O3 : 0.99, Nd2O3 : 2.27, ThO2 : 1.34, SrO : 2.93, CaO : 5.13, K2O : 0.58, Na2O : 15.48, CO2 : 32.97, Ln2O3 : 40.05 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2000)

Strunz 9th edition incl. updates

5.AD.15

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

Lapis Classification

V/B.07-005

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

Classification by Hölzel

5.AC.285

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

Dana 8th edition

14.04.05.03

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Burbankite group

Optical Properties

Color

orange-met.

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.007

Birefringence chart\! Rémondite-(La) title=Birefringence chart Rémondite-(La)

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

1.615

RI value β

1.619

RI value γ / ε

1.622

Ri mean

1.619

2V angle

Biaxial (-) 80° (gemessen) 85° (berechnet)

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

4

Space Group

P21

Cell parameters a (Å)

10.49

Cell parameters b (Å)

6.417

Cell parameters c (Å)

10.50

Cell parameters a/b or c/a

1.635

Cell parameters c/b

1.636

Cell parameters α

90°

Cell parameters β

119.80

Cell parameters γ

90°

Z

2

Volume (ų)

613.337

X-Ray Powder Diffraction

5.28(50),
3.70(70),
3.036(90),
2.740(50),
2.623(100),
2.143(80),
2.041(60),
1.939(60)

XRD chart Rémondite-(La)

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)

3.57 (berechnet)

3.545 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

Instability

+++ HCl, HNO3

Preface

Author (Name, Year)

Pekov & Chukanov & Kononkova & Zadov & Belovitskaya, 2000

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 129 (2000) (1), 53

IMA 15-E: Spelling of names of eight mineral species Proposal 15-E is accepted, and the spelling of eight mineral names is modified as follows: achavalite becomes achávalite; behierite becomes béhierite; camerolaite becomes camérolaite; fabriesite becomes fabrièsite; remondite-(Ce) becomes rémondite-(Ce); remondite-(La) becomes rémondite-(La); sénarmontite becomes senarmontite; sérandite becomes serandite.

CNMNC Newsletter No. 50; Mineralogical Magazine, 31 [Formel]

IMA group assignments


 
 
(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
hexagonal
P63mc

 
 
Na3(Ca,Ce,La,Sr)3(CO3)5
hexagonal
P63mc

 
 
(NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5
hexagonal
P63mc

 
 
(Ca2☐)Sr3(CO3)5
hexagonal
P63mc

 
 
(Na,Ca)4(Ce,La,Nd,Sr)2(CO3)5
monoklin
P21

 
 
Na3(Ce,Ca,Na)3(CO3)5
monoklin
P21

 
 
Na3(La,Ca,Na)3(CO3)5
monoklin
P21

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Actuality: 18. Jul 2024 - 09:52:06

Other languages

German

Rémondit-(La)

Spanish

Rémondita-(La)

English

Rémondite-(La)

French

Rémondite-(La)

Russian

Ремондит-(La)

CNMNC (IMA)-Number

IMA 1999-006

CNMNC symbol

Symbol

Rém-La

Locations with GPS information

IDs

GUSID (Global unique identifier short form) rNJsWQ--6kC9cD6mvDplFg
GUID (Global unique identifier) 596CD2AC-BE0F-40EA-BD70-3EA6BC3A6516
Database ID 3244