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Sardignaite

Pictures (2 Images total)

Sardignait
Views (File:
1379844752
): 1347
Sardignait
Größe: 0,7 mm; Fundort: Su Senargiu mine, Sarroch, Cagliari, Sardinien, Italien
Copyright: Enrico Bonacina; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Sardinien (Sardegna), Region/Cagliari, Metropolitanstadt/Sarroch/Su Senargiu mine
Mineral: Sardignaite
Image: 1379844752
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Sardignait

Größe: 0,7 mm; Fundort: Su Senargiu mine, Sarroch, Cagliari, Sardinien, Italien
Collection: Domenico Preite
Copyright: Enrico Bonacina
Contribution: Hg 2013-09-22
Locality: Su Senargiu mine / Sarroch / Cagliari, Metropolitanstadt / Sardinien (Sardegna), Region / Italien
Sardignait
Views (File:
1379844668
): 980
Sardignait
Größe: 0,7 mm; Fundort: Su Senargiu mine, Sarroch, Cagliari, Sardinien, Italien
Copyright: Enrico Bonacina; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Sardinien (Sardegna), Region/Cagliari, Metropolitanstadt/Sarroch/Su Senargiu mine
Mineral: Sardignaite
Image: 1379844668
License: Usage for Mineralienatlas project only
Sardignait

Größe: 0,7 mm; Fundort: Su Senargiu mine, Sarroch, Cagliari, Sardinien, Italien
Collection: Domenico Preite
Copyright: Enrico Bonacina
Contribution: Hg 2013-09-22
Locality: Su Senargiu mine / Sarroch / Cagliari, Metropolitanstadt / Sardinien (Sardegna), Region / Italien

Collectors Summary

Fracture muschelig
Crystal System monoklin, P21/m

Chemism

Chemical formula

BiMo2O7(OH)·2H2O

Additional chem. information

stark verwandt mit IMA2009-022

Chemical composition

Bismut, Molybdän, Sauerstoff, Wasserstoff

Unit weight: 565.898417 u; Number of atoms in the formula: 18

Info

Empirical formula:

BiMo2O7(OH)·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.89

5

27.78

1.0079470

5.0397350
Oxygen

O

28.27

10

55.56

15.9994300

159.9943000
Molybdenum

Mo

33.91

2

11.11

95.9420000

191.8840000
Bismuth

Bi

36.93

1

5.56

208.9803820

208.9803820

Analysis wt%

MoO3 : 50.87, Bi2O3 : 41.17, H2O : 7.96 (Ref: berechnet)

Strunz 9th edition incl. updates

4.E

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
E: Metall: Sauerstoff = < 1 :2
E:

Lapis Classification

IV/D.25-080

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)
25: Stibiotantalit-Gruppe

Classification by Hölzel

7.GD.500

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
G: Molybdates and Wolframates
D: Molybdates and Wolframates (+Anions +Water)
5: Di-molybdates, Wolframates

IMA status

Neue Mineralien Nov. 2008 - IMA-WEB-Seite [anerkannt]

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

high

RI value α / ω / n

2.04

RI value β

by

RI value γ / ε

GlD

Ri mean

2.040

2V angle

Biaxial (+) nd

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

5.780

Cell parameters b (Å)

11.567

Cell parameters c (Å)

6.334

Cell parameters a/b or c/a

0.500

Cell parameters c/b

0.548

Cell parameters α

90°

Cell parameters β

113.37

Cell parameters γ

90°

Z

2

Volume (ų)

388.733

Crystal structure

Neuer Strukturtyp

X-Ray Powder Diffraction

5.79(25), 5.03(80), 3.327(28), 3.206(100), 3.120(32), 2.590(30), 2.115(30), 1.992(45)
XRD chart Sardignaite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.834 ( ρ calc. Mineralienatlas )

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Italien/Sardinien (Sardegna), Region/Cagliari, Metropolitanstadt/Sarroch/Su Senargiu mine

Preface

Author (Name, Year)

Paolo Orlandi, Marco Pasero, Simona Bigi (2010)

References

Paolo Orlandi, Marco Pasero, Simona Bigi: Sardignaite, a new mineral, the second known bismuth molybdate: description and crystal structure. Mineralogy and Petrology, Vol. 100, Issue 1 (2010) S. 17-22.

Neue Mineralien Nov. 2008 - IMA-WEB-Seite [anerkannt]

Ciriotti, M.E., Fascio, L. & Pasero, M. (2009): Italian Type Minerals. Edizioni Plus, Università di Pisa, Pisa, Italy, 357 pp.

Other languages

German

Sardignait

Spanish

Sardignaita

English

Sardignaite

CNMNC (IMA)-Number

IMA 2008-040

CNMNC symbol

Symbol

Sdi

Locations with GPS information

IDs

GUSID (Global unique identifier short form) UkNZlJckZU6R18pcvGmTJA
GUID (Global unique identifier) 94594352-2497-4E65-91D7-CA5CBC699324
Database ID 5088