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Mapiquiroite

Pictures (1 Images total)

Mapiquiroite
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Mapiquiroite
black tiny crystal of the very rare mapiquiroite; photo Germano Fretti; collection Luigi Chiappino; Locality: Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Apuan Alps, Lucca Province, Tuscany, Italy;
Copyright: Luigi Chiappino; Contribution: Stefan
Location: Italien/Toskana (Toscana)/Lucca, Provinz/Apuanische Alpen/Stazzema/Sant'Anna di Stazzema/Miniera di Monte Arsiccio
Mineral: Mapiquiroite
Image: 1475943691
License: Usage for Mineralienatlas project only
Mapiquiroite

black tiny crystal of the very rare mapiquiroite; photo Germano Fretti; collection Luigi Chiappino; Locality: Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Apuan Alps, Lucca Province, Tusca...
Copyright: Luigi Chiappino
Contribution: Stefan 2016-10-08
Locality: Miniera di Monte Arsiccio / Sant'Anna di Stazzema / Stazzema / Apuanische Alpen / Lucca, Provinz / Toskana (Toscana) / Italien

Collectors Summary

Color schwarz
Lustre Halbmetallglanz
Hardness (Mohs) 6
Crystal System trigonal, R3
Morphology Buca della Vena: Komplexe rhombohedrale oder tabulare pseudo-hexagonale Kristalle bis zu 1 mm Größe. Monte Arsiccio: Tabulare pseudo-hexagonale Kristalle bis zu 5 mm

Additional information / Summary

2013 ein neus Mineral aus Baryt, Pyrit und Eisenoxid-Erzen der Buca della Vena (BdV) und Monte Arsiccio (MA) Mine in den Apuanischen Alpen, Toskana, Italien.

Chemism

Chemical formula

(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38

Empirical formula (analysis)

(Sr0.533La0.176Pb0.105Na0.030Ca0.026)Σ0.870 (U0.407Ce0.101Y0.205Mn0.072)Σ0.785 Fe3+2.000 (Ti12.423Fe3+3.345Cr1.624V5+0.129Al0.032Sn0.013Nb0.007)Σ17.573O38

Chemical composition

Blei, Chrom, Eisen, Strontium, Titan, Yttrium, Sauerstoff, Uran

Unit weight: 1823.0430078962 u; Number of atoms in the formula: 59.228

Info

Empirical formula:

(Sr0.533La0.176Pb0.105Na0.030Ca0.026)(U0.407Ce0.101Y0.205Mn0.072)Fe2.000(Ti12.423Fe3.345Cr1.624V0.129Al0.032Sn0.013Nb0.007)O38

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

33.35

38

64.16

15.9994300

607.9783400
Sodium

Na

0.04

0.03

0.05

22.9897702

0.6896931
Aluminium

Al

0.05

0.03

0.05

26.9815382

0.8634092
Calcium

Ca

0.06

0.03

0.04

40.0784000

1.0420384
Titanium

Ti

32.62

12.42

20.97

47.8671000

594.6529833
Vanadium

V

0.36

0.13

0.22

50.9415100

6.5714548
Chromium

Cr

4.63

1.62

2.74

51.9961600

84.4417638
Manganese

Mn

0.22

0.07

0.12

54.9380499

3.9555396
Iron

Fe

16.37

5.35

9.02

55.8452000

298.4925940
Strontium

Sr

2.56

0.53

0.90

87.6210000

46.7019930
Yttrium

Y

1.00

0.21

0.35

88.9058520

18.2256997
Niobium

Nb

0.04

0.01

0.01

92.9063820

0.6503447
Tin

Sn

0.08

0.01

0.02

118.7107000

1.5432391
Lanthanum

La

1.34

0.18

0.30

138.9055200

24.4473715
Cerium

Ce

0.78

0.1

0.17

140.1161000

14.1517261
Lead

Pb

1.19

0.11

0.18

207.2100000

21.7570500
Uranium

U

5.31

0.41

0.69

238.0289130

96.8777676

Strunz 9th edition incl. updates

4.CC.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
40:Crichtonit-Gruppe

Lapis Classification

IV/C.09-047

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
9: Crichtonit-Gruppe

IMA status

anerkannt - CNMNC Newsletter No. 16, August 2013

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Crichtonite Group

Optical Properties

Color

schwarz

Lustre

Halbmetallglanz

Reflectivity: (Lambda nm) ↓, ↑, Ø

(471.1) 17.00, 17.20, 17.10
(548.3) 16.70, 17.00, 16.85
(586.6) 16.40, 16.70, 16.55
(652.3) 16.10, 16.30, 16.20
Reflection chart Mapiquiroite

Reflectivity Ø

16.68

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

10.3719

Cell parameters b (Å)

-

Cell parameters c (Å)

20.875

Cell parameters a/b or c/a

2.013

Cell parameters c/b

-

Z

3

Volume (ų)

1944.795

Crystal structure

Crichtonit-Gruppe, Struktur bestimmt

X-Ray Powder Diffraction

6.81(76), 5.18(100), 4.51(44), 3.404(41), 2.994(35)
XRD chart Mapiquiroite

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

Morphology

Buca della Vena: Komplexe rhombohedrale oder tabulare pseudo-hexagonale Kristalle bis zu 1 mm Größe.

Monte Arsiccio: Tabulare pseudo-hexagonale Kristalle bis zu 5 mm

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

750 kg · mm-2 und 782 kg·mm-2

Density (g/cm³)

4.73

4.669 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Stazzema/Buca della Vena

Italien/Toskana (Toscana)/Lucca, Provinz/Apuanische Alpen/Stazzema/Sant'Anna di Stazzema/Miniera di Monte Arsiccio

Type material

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

Collection number of type material

18837 (Buca della Vena), 19650 (Monte Arsiccio)

Paragenesis of type material

Monte Arsiccio: Baryt, Boulangerit, Derbylit, Siderit, Sphalerit

Buca della Vena: Allanit-(Ce), Anatas, Destinezit, Gyps, Monazit-(Ce), Pyrit, Rutil, Turmalin

Preface

Name from

den vier Sammlern Riccardo Mazzanti, Luigi Pierotti, Ugo Quilici und Moreno Romani

Author (Name, Year)

Cristian Biagioni, Paolo Orlandi, Marco Pasero, Fabrizio Nestola and Luca Bindi (2013)

References

C., Orlandi, P., Pasero, M., Nestola, F. and Bindi, L. (2013) Mapiquiroite, IMA 2013-010. CNMNC Newsletter No. 16, August 2013, page 2703; Mineralogical Magazine, 77, 2695-2709.

Cristian Biagioni, Paolo Orlandi, Marco Pasero, Fabrizio Nestola, Luca Bindi - Mapiquiroite, (Sr,Pb)(U,Y)Fe2(Ti,Fe3+)18O38, a new member of the crichtonite group from the Apuan Alps, Tuscany, Italy - European Journal of Mineralogy June 2014 26 (3) 427-437

IMA group assignments

Other languages

German

Mapiquiroit

English

Mapiquiroite

Russian

Мапиквироит

CNMNC (IMA)-Number

IMA 2013-010

CNMNC symbol

Symbol

Mpq

Locations with GPS information

IDs

GUSID (Global unique identifier short form) iqLvptyZMkm-RJmdSy6dMg
GUID (Global unique identifier) A6EFA28A-99DC-4932-BE44-999D4B2E9D32
Database ID 7619