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Bernarlottiite

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Bernarlottiit
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Bernarlottiit
graue, nadelige Kristalle von Bernarlottiit, Ceragiola Steinbrüche, Seravezza, Lucca Provinz, Tuskana, Italien; BB < 1 mm
Copyright: Joy Desor; Contribution: openpit
Location: Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Seravezza/Seravezza-Steinbrüche (Cave di Seravezza)/Ceragiola Bereich
Mineral: Bernarlottiite
Image: 1587234949
License: Usage for Mineralienatlas project only
Bernarlottiit

graue, nadelige Kristalle von Bernarlottiit, Ceragiola Steinbrüche, Seravezza, Lucca Provinz, Tuskana, Italien; BB < 1 mm

Copyright: Joy Desor
Contribution: openpit 2020-04-18
Locality: Ceragiola Bereich / Seravezza-Steinbrüche (Cave di Seravezza) / Seravezza / Massa-Carrara, Provinz / Toskana (Toscana) / Italien

Collectors Summary

Color bleigrau
Lustre Metallglanz
Crystal System triklin, P1

Chemism

Chemical formula

Pb6(As5Sb3)S18

Empirical formula (analysis)

Cu0.07Pb11.71As11.59Sb4.63S35.78

Additional chem. information

Pb11.92As10.12Sb5.95S36.76 (Probe # 3819).

Chemical composition

Antimon, Arsen, Blei, Schwefel

Unit weight: 5010.27156118 u; Number of atoms in the formula: 63.78

Info

Empirical formula:

Cu0.07Pb11.71As11.59Sb4.63S35.78

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

22.90

35.78

56.10

32.0655000

1,147.3035900

Copper

Cu

0.09

0.07

0.11

63.5463000

4.4482410

Arsenic

As

17.33

11.59

18.17

74.9216020

868.3413672

Antimony

Sb

11.25

4.63

7.26

121.7601000

563.7492630

Lead

Pb

48.43

11.71

18.36

207.2100000

2,426.4291000

Analysis wt%

Cu : 0.09 (16),
Pb : 48.89 (1.26),
As : 17.48 (22),
Sb : 11.36 (10),
S : 23.11 (32),
Total : 100.93 (1.38)

Strunz 9th edition incl. updates

2.HC.05b

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
H: Sulfosalze mit SnS als Vorbild
C: Nur mit [Blei] (Pb)
05b:

Lapis Classification

II/E.24-017

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
E: Sulfosalze (S : As,Sb,Bi = x)
24: Blei-Sulfosalze mit As/Sb (x= 2,3 - 1,8)

IMA status

anerkannt - CNMNC Newsletter No. 20, June 2014, page 553

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Sartorite homologues series

Optical Properties

Color

bleigrau

Change in color

Unter dem Erzmikroskop, weiß mit reichlich roten internen Reflektionen.

Lustre

Metallglanz

Pleochroism

schwach an der Luft mit graublauen Schattierungen

Anisotropism

ausgeprägt bis stark mit graubläulichen Rotationsfarben

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 30.00, 37.50, 33.75
(546) 30.30, 37.30, 33.80
(589) 29.70, 36.80, 33.25
(650) 29.30, 36.20, 32.75

Reflection chart Bernarlottiite

Reflectivity Ø

33.39

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

23.501(8)

Cell parameters b (Å)

8.386(2)

Cell parameters c (Å)

23.704(8)

Cell parameters a/b or c/a

2.802

Cell parameters c/b

2.827

Cell parameters α

89.88(1)

Cell parameters β

102.93(1)

Cell parameters γ

89.91(1)

Z

3

Volume (ų)

4553.098

X-Ray Powder Diffraction

3.851(s), 3.794(s), 3.278(s), 3.075(s), 2.748(vs), 2.363(s), 2.221(vs), 1.935(s)

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

5.481 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Seravezza/Seravezza-Steinbrüche (Cave di Seravezza)/Ceragiola Bereich

Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Seravezza/Seravezza-Steinbrüche (Cave di Seravezza)/Pitone

Type material

Museo di Storia Naturale, Universita` di Pisa, Via Roma 79, Calci (Pisa), Italy

Collection number of type material

19687

Paragenesis of type material

Sb-reicher Sartorit

Preface

Name from

Bernardino Lotti (1847–1933) für seine erheblichen Beiträge zum Wissen um die Geologie der Toskana und seiner Beiträge zum Ausbau der toskanischen Bergbauindustrie.

Author (Name, Year)

Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y. and Paar, W.H. (2017)

References

Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y. and Paar, W.H. (2014) Bernarlottiite, IMA 2013-133. CNMNC Newsletter No. 20, June 2014, page 553; Mineralogical Magazine, 78, 549-558

Paolo Orlandi, Cristian Biagioni, Elena Bonaccorsi, Yves Moëlo, Werner H. Paar: Lead-antimony sulfosalts from Tuscany (Italy). XXI. Bernarlottiite, Pb12(As10Sb6)ΣS16S36, a new N = 3.5 member of the sartorite homologous series from the Ceragiola marble quarry: occurrence and crystal structure. European Journal of Mineralogy Vol. 29 Nr. 4 (2017) S. 713-726. First Published on February 06, 2017.

IMA group assignments

Other languages

German

Bernarlottiit

English

Bernarlottiite

Russian

Бернарлоттиит

CNMNC (IMA)-Number

IMA 2013-133

CNMNC symbol

Symbol

Bl

IDs

GUSID (Global unique identifier short form) I6BHsrwTR0qe8Wb7uxJsCw
GUID (Global unique identifier) B247A023-13BC-4A47-9EF1-66FBBB126C0B
Database ID 7761