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Orthojoaquinite-(La)

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Orthojoaquinit-(La)
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Orthojoaquinit-(La)
Reiche kompakte blättrige Massen assoziiert mit Mikroklin und rötlichem Yofortierit; Größe: 3x2 cm.
Copyright: Pavel M. Kartashov; Contribution: Collector
Location: Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex
Mineral: Orthojoaquinite-(La)
Image: 1322581871
License: Usage for Mineralienatlas project only
Orthojoaquinit-(La)

Reiche kompakte blättrige Massen assoziiert mit Mikroklin und rötlichem Yofortierit; Größe: 3x2 cm.
Copyright: Pavel M. Kartashov
Contribution: Collector 2011-11-29
Locality: Ilimaussaq-Komplex / Narsaq / Kommune Kujalleq / Grönland

Collectors Summary

Color braun
Lustre Seidenglanz
Hardness (Mohs) 5.00 - 5.50
Cleavages gut {001}
Crystal System orthorhombisch, Ccmm

Chemism

Chemical formula

NaBa2(La,Ce)2Fe2+(Ti,Nb)2[(O,OH,F)3|(Si4O12)2]·H2O

Chemical composition

Barium, Cerium, Eisen, Lanthanum, Natrium, Niob, Silicium, Titan, Fluor, Sauerstoff, Wasserstoff

Unit weight: 1426.651559475 u; Number of atoms in the formula: 46.9

Info

Empirical formula:

NaBa2(La0.75Ce0.25)2Fe(Ti0.75Nb0.25)2[(O0.6(OH)0.3F0.1)3(Si4O12)2]·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.20

2.9

6.18

1.0079470

2.9230463
Oxygen

O

31.06

27.7

59.06

15.9994300

443.1842110
Fluorine

F

0.40

0.3

0.64

18.9984033

5.6995210
Sodium

Na

1.61

1

2.13

22.9897702

22.9897702
Silicon

Si

15.75

8

17.06

28.0855300

224.6842400
Titanium

Ti

5.03

1.5

3.20

47.8671000

71.8006500
Iron

Fe

3.91

1

2.13

55.8452000

55.8452000
Niobium

Nb

3.26

0.5

1.07

92.9063820

46.4531910
Barium

Ba

19.25

2

4.26

137.3277000

274.6554000
Lanthanum

La

14.60

1.5

3.20

138.9055200

208.3582800
Cerium

Ce

4.91

0.5

1.07

140.1161000

70.0580500

Analysis wt%

SiO2 : 33.82, Nb2O5 : 2.31, TiO2 : 9.20, FeO : 4.78, MnO : 0.70, La2O3 : 10.05, Ce2O3 : 9.40, Pr2O3 : 0.99, Nd2O3 : 2.15, BaO : 21.46, Na2O : 2.41, H2O : 1.50, Ln2O3 : 22.59 (Ref: Canadian Mineralogist 2001)

Strunz 9th edition incl. updates

9.CE.25

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
E: [Si4O12]8- vierer-Einfachringe, ohne inselartige komplexe [Anionen]
25:

Lapis Classification

VIII/E.08-089

VIII: SILIKATE
E: Ringsilikate
8: Viererringe [Si4O12] 8-; Joaquinit-Gruppe und Verwandte

Classification by Hölzel

9.CB.355

9: SILICATES
C: Cyclosilicates
B: ~[Si4O12]8-, ~[Si4O10]4--Rings
3: Joaquinite-Group

Dana 8th edition

60.01.01b.05

60: Cyclosilicates Cyclosilicate Four-Membered Rings
01: Cyclosilicates Cyclosilicate Four-Membered Rings as Titanosilicates
01b: Joaquinite group (Ortho-joaquinite subgroup)

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Joaquinite group

Optical Properties

Color

braun

Diaphaneity (Transparency)

durchsichtig

Lustre

Seidenglanz

max. Birefringence

0.043
Birefringence chart\! Orthojoaquinite-(La) title=Birefringence chart Orthojoaquinite-(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

1.754

RI value β

1.760

RI value γ / ε

1.797

Ri mean

1.770

2V angle

Biaxial (+) 40°

Pleochroism

stark; gelbgrün

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

63

Space Group

Ccmm

Cell parameters a (Å)

10.539

Cell parameters b (Å)

9.680

Cell parameters c (Å)

22.345

Cell parameters a/b or c/a

1.089

Cell parameters c/b

2.308

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

2279.581

X-Ray Powder Diffraction

5.58(70),
3.00(10),
2.95(20),
2.91(10),
2.80(100),
2.232(10),
1.596(10),
1.397(10)
XRD chart Orthojoaquinite-(La)

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.00 - 5.50

VHN (Hardness Vickers)

390 (g nicht angegeben)

Density (g/cm³)

4.10 (gemessen), 4.14 (berechnet)

4.157 ( ρ calc. Mineralienatlas )

Cleavages

gut {001}

(Co-)Type locality

(Co-)Type locality

Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex

Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex/Kuannersuit-Plateau/Narsaq, Fluß

Preface

Occurrences

Nephelin-Sodalith-Syenit-Pegmatite

Author (Name, Year)

Matsubara & Mandarino & Semenov, 2001

References

Canadian Mineralogist 39 (2001), 757

IMA group assignments

 
Joaquinite group
 
 
 

 
 
Bario-orthojoaquinite
(Ba,Sr)4Fe2+2Ti2Si8O26·H2O
orthorhombisch
Cc2m

 
 
Byelorussite-(Ce)
NaBa2(Ce,La)2Mn2+Ti2Si8O26(F,OH)·H2O
orthorhombisch
Ama2

 
 
Joaquinite-(Ce)
NaBa2Fe2+Ti2Ce2(Si4O12)2O2(OH)·H2O
monoklin
C2

 
 
Orthojoaquinite-(Ce)
Ba2NaCe2Fe2+Ti2Si8O26(O,OH)·H2O
orthorhombisch
Ccmm

 
 
Orthojoaquinite-(La)
NaBa2(La,Ce)2Fe2+(Ti,Nb)2[(O,OH,F)3|(Si4O12)2]·H2O
orthorhombisch
Ccmm

 
 
Strontiojoaquinite
Sr2Ba2(Na,Fe2+)2Ti2Si8O24(O,OH)2·H2O
monoklin
Pm, P2, P2/m

 
 
Strontio-orthojoaquinite
Sr2Ba2(Na,Fe2+)2Ti2Si8O24(O,OH)2·H2O
 
 

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Actuality: 16. Mar 2025 - 15:51:19

Other languages

German

Orthojoaquinit-(La)

English

Orthojoaquinite-(La)

French

Orthojoaquinite-(La)

Spanish

Ortojoaquinita-(La)

Simplified Chinese

斜方硅钠钡钛镧石

CNMNC (IMA)-Number

IMA 2000-D

CNMNC symbol

Symbol

Ojq-La

IDs

GUSID (Global unique identifier short form) YdOXZVdUJkyE3F_kLYxVEQ
GUID (Global unique identifier) 6597D361-5457-4C26-84DC-5FE42D8C5511
Database ID 2849