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Lucchesiite

Pictures (2 Images total)

Lucchesiit
Views (File:
1586509909
): 348
Lucchesiit
grünschwarze Kristalle von Lucchesiit in Quarz, Mirošov, Žďár nad Sázavou, Vysočina, Tschechische Republik; BB < 5 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Tschechien/Hochland (Vysočina kraj)/Saar (Okres Žd'ár nad Sázavou)/Miroschau (Mirošov)
Mineral: Lucchesiite
Image: 1586509909
License: Usage for Mineralienatlas project only
Lucchesiit

grünschwarze Kristalle von Lucchesiit in Quarz, Mirošov, Žďár nad Sázavou, Vysočina, Tschechische Republik; BB < 5 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-10
Locality: Miroschau (Mirošov) / Saar (Okres Žd'ár nad Sázavou) / Hochland (Vysočina kraj) / Tschechien
Lucchesiit
Views (File:
1702753092
): 40
Lucchesiit
Schwarzer Lucchesiit (ohne Maßstab) von der TL Ratnapura, Sabaragamuwa Province, Sri Lanka.
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: Sri Lanka/Sabaragamuwa, Provinz/Rathnapura (Ratnapura), Distrikt/Rathnapura (Ratnapura)
Mineral: Lucchesiite
Image: 1702753092
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Lucchesiit

Schwarzer Lucchesiit (ohne Maßstab) von der TL Ratnapura, Sabaragamuwa Province, Sri Lanka.
Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2023-12-16
Locality: Rathnapura (Ratnapura) / Rathnapura (Ratnapura), Distrikt / Sabaragamuwa, Provinz / Sri Lanka

Collectors Summary

Color schwarz
Streak color grau
Lustre Glasglanz
Hardness (Mohs) 7
Fracture muschelig
Crystal System trigonal, R3m

Chemism

Chemical formula

CaFe2+3Al6(Si6O18)(BO3)3(OH)3O

Chemical composition

Aluminium, Calcium, Eisen, Silicium, Bor, Sauerstoff, Wasserstoff

Unit weight: 1069.4576802 u; Number of atoms in the formula: 53

Info

Empirical formula:

CaFe3Al6(Si6O18)(BO3)3(OH)3O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.28

3

5.66

1.0079470

3.0238410
Boron

B

3.03

3

5.66

10.8117000

32.4351000
Oxygen

O

46.38

31

58.49

15.9994300

495.9823300
Aluminium

Al

15.14

6

11.32

26.9815382

161.8892292
Silicon

Si

15.76

6

11.32

28.0855300

168.5131800
Calcium

Ca

3.75

1

1.89

40.0784000

40.0784000
Iron

Fe

15.67

3

5.66

55.8452000

167.5356000

Strunz 9th edition incl. updates

9.CK.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
K: ~[Si6O18]12- sechser-Einfachringe, mit inselartig, komplexe [Anionen]
05:

Lapis Classification

VIII/E.19-105

VIII: SILIKATE
E: Ringsilikate
19: Sechserringe [Si6O18] 12-; Turmalin-Gruppe

IMA status

anerkannt CNMNC Aug. 2015 - CNMNC Newsletter No. 27 Okt. 2015

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Tourmaline supergroup  ⇒ Calcic-Tourmaline group  ⇒ Tourmaline Calcic-subgroup 1

Optical Properties

Color

schwarz

Streak color

grau

Lustre

Glasglanz

2V angle

Uniaxial(-)

Pleochroism

O = sehr dunkelbraun; E = hellbraun in planar polarisiertem Licht

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

16.0018(7)

Cell parameters b (Å)

-

Cell parameters c (Å)

7.2149(3)

Cell parameters a/b or c/a

0.451

Cell parameters c/b

-

Z

3

Volume (ų)

1599.921

X-Ray Powder Diffraction

6.424(53), 4.249(41), 4.007(29), 3.503(100), 2.979(100), 2.591(84), 2.413(22), 2.053(49)
XRD chart Lucchesiite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

7

Density (g/cm³)

3.209 (Sri Lanka) - 3.243 (Czech Republic) (berechnet)

3.33 ( ρ calc. Mineralienatlas )

Fracture

muschelig

(Co-)Type locality

(Co-)Type locality

Sri Lanka/Sabaragamuwa, Provinz/Rathnapura (Ratnapura), Distrikt/Rathnapura (Ratnapura)

Tschechien/Hochland (Vysočina kraj)/Saar (Okres Žd'ár nad Sázavou)/Miroschau (Mirošov)

Sri Lanka/Sabaragamuwa, Provinz/Rathnapura (Ratnapura), Distrikt/Rathnapura (Ratnapura)/Edelstein-Seifenlagerstätte

Type material

Typmaterial (Sri Lanka) befindet sich in der Sammlung Museum of Mineralogy, Earth Sciences Department, Sapienza University of Rom, Piazzale Aldo Moro 5, 00185 Rom, Italien, Katalognummer: 33198/1.

Co-typmaterial (Tschechien) befindet sich im Moravian Museum, Department of Mineralogy and Petrography, Zelný trh 6, Brno, Czech Republic, Katalognummern: A11137 und A11138

Preface

Author (Name, Year)

Ferdinando Bosi, Henrik Skogby, Marco E. Ciriotti, Petr Gadas, Milan Novák, Jan Cempírek, Dalibor Všianský und Jan Filip (2017)

References

Bosi, F., Skogby, H., Ciriotti, M.E., Gadas, P., Novák, M., Cempírek, J., Všianský, D. and Filip, J. (2015) Lucchesiite, IMA 2015-043. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229–1236.

Ferdinando Bosi, Henrik Skogby, Marco E. Ciriotti, Petr Gadas, Milan Novák, Jan Cempírek, Dalibor Všianský, Jan Filip: Lucchesiite, CaFe2+3Al6(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup. Mineralogical Magazine, Jhrg. 81, Nr. 1 (2017) S. 1-14. [PREPUBLICATION 19 Feb. 2016]

Bosi, F., Skogby, H., Hålenius, U. et al.: Experimental cation redistribution in the tourmaline lucchesiite, CaFe2 + 3Al6(Si6O18)(BO3)3(OH)3O. Physics and Chemistry of Minerals Vol. 45, Issue 7 (2018) S. 621–632.

IMA group assignments

Other languages

German

Lucchesiit

English

Lucchesiite

CNMNC (IMA)-Number

IMA 2015-043

CNMNC symbol

Symbol

Lcc

Locations with GPS information

IDs

GUSID (Global unique identifier short form) IdTHOA_hrUCExSnRmYt-rA
GUID (Global unique identifier) 38C7D421-E10F-40AD-84C5-29D1998B7EAC
Database ID 8001