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Tuscanite

Pictures (8 Images total)

Tuscanit
Views (File:
1288905891
): 1393
Tuscanit
Größe: 3,9 mm; Fundort: Sacrofano Caldera, Latium, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano
Mineral: Tuscanite
Image: 1288905891
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Tuscanit

Größe: 3,9 mm; Fundort: Sacrofano Caldera, Latium, Italien
Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-11-04
Locality: Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien
Tuscanit
Views (File:
1294399833
): 1055
Tuscanit
Größe: 2 mm; Fundort: Biachella-Tal, Sacrofano, Latium, Italien
Copyright: Enrico Bonacina; Contribution: Hg
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Biachella-Tal
Mineral: Tuscanite
Image: 1294399833
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Tuscanit

Größe: 2 mm; Fundort: Biachella-Tal, Sacrofano, Latium, Italien
Copyright: Enrico Bonacina
Contribution: Hg 2011-01-07
Locality: Biachella-Tal / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien
Tuscanit
Views (File:
1276882038
): 954
Tuscanit
Bildbreite: 6 mm, Fundort: Biachella-Tal, Sacrofano, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Biachella-Tal
Mineral: Tuscanite
Image: 1276882038
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Tuscanit

Bildbreite: 6 mm, Fundort: Biachella-Tal, Sacrofano, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2010-06-18
Locality: Biachella-Tal / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien
Tuscanit xx
Views (File:
1162131638
): 997
Tuscanit xx
Fundort: Valle Biachella, Sacrofano, Italien; Bildbreite: 8 mm
Copyright: loismin; Contribution: loismin
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Biachella-Tal
Mineral: Tuscanite
Image: 1162131638
Rating: 5.5 (votes: 2)
License: Usage for Mineralienatlas project only
Tuscanit xx

Fundort: Valle Biachella, Sacrofano, Italien; Bildbreite: 8 mm
Copyright: loismin
Contribution: loismin 2006-10-29
Locality: Biachella-Tal / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien
Tuscanit
Views (File:
1303062914
): 849
Tuscanit
Kristallgröße: 0,6 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Tuscanite
Image: 1303062914
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Tuscanit

Kristallgröße: 0,6 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2011-04-17
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 5.50 - 6.00
Crystal System monoklin, P21/a

Chemism

Chemical formula

K(Ca,Na)6(Si,Al)10O22(SO4,CO3,(OH)2)·H2O

Chemical composition

Aluminium, Calcium, Natrium, Silicium, Kalium, Kohlenstoff, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1092.1209138 u; Number of atoms in the formula: 55

Info

Empirical formula:

K(Ca0.75Na0.25)6(Si0.75Al0.25)10O22(SO4,CO3,(OH)2)·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.37

4

7.27

1.0079470

4.0317880
Carbon

C

1.10

1

1.82

12.0107800

12.0107800
Oxygen

O

46.88

32

58.18

15.9994300

511.9817600
Sodium

Na

3.16

1.5

2.73

22.9897702

34.4846553
Aluminium

Al

6.18

2.5

4.55

26.9815382

67.4538455
Silicon

Si

19.29

7.5

13.64

28.0855300

210.6414750
Sulfur

S

2.94

1

1.82

32.0655000

32.0655000
Potassium

K

3.58

1

1.82

39.0983100

39.0983100
Calcium

Ca

16.51

4.5

8.18

40.0784000

180.3528000

Analysis wt%

SiO2 : 34.64, Al2O3 : 16.95, Fe2O3 : 0.76, MgO : 0.40, CaO : 26.76, Na2O : 1.45, K2O : 3.79, H2O : 2.61, SO3 : 10.04, CO2 : 2.20 (Ref: American Mineralogist 77)

Strunz 9th edition incl. updates

9.EG.45

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
G: Doppelnetze mit sechsfach-Ringen
45:Latiumit-Gruppe

Lapis Classification

VIII/H.06-020

VIII: SILIKATE
H: Schichtsilikate
6: tetragonale oder pseudotetragonale Schichtstrukturen [Si4O10] 4- u.a.

Classification by Hölzel

9.EA.720

9: SILICATES
E: Phyllosilicates
A: tetragonal & pseudotetragonal Phyllosilicates
7: Tuscanite-Group

Dana 8th edition

73.01.02.02

73: Phyllosilicates Phyllosilicate Condensed Tetrahedral Sheets
01: Phyllosilicates Phyllosilicate Condensed Tetrahedral Sheets with double layers
02: Latiumite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.010
Birefringence chart\! Tuscanite title=Birefringence chart Tuscanite

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

1.581

RI value β

1.590

RI value γ / ε

1.591

Ri mean

1.587

2V angle

Biaxial (+) 40°

Optical Data Luminescence

Color LW-UV (365nm)

  

gelblich weiß

Color SW-UV (254nm)

  

gelblich weiß

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

24.036

Cell parameters b (Å)

5.110

Cell parameters c (Å)

10.888

Cell parameters a/b or c/a

4.704

Cell parameters c/b

2.131

Cell parameters α

90°

Cell parameters β

106.95

Cell parameters γ

90°

Z

2

Volume (ų)

1279.214

X-Ray Powder Diffraction

11.51(100),
5.75(20),
3.832(20),
3.065(50),
3.004(10),
2.962(20),
2.872(100),
2.554(10)
XRD chart Tuscanite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.50 - 6.00

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.83 (gemessen)

2.835 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Grosseto, Provinz/Pitigliano/Case Collina (Toscopomici Steinbruch)

Preface

Author (Name, Year)

Orlandi & Leoni & Mellini & Merlino, 1977

References

American Mineralogist 62 (1977), 1110

Other languages

Spanish

Toscanita

German

Tuscanit

English

Tuscanite

French

Tuscanite

Russian

Тусканит

Alternative Name

Spanish

Tuscanita

CNMNC (IMA)-Number

IMA 1976-031

CNMNC symbol

Symbol

Tus

IDs

GUSID (Global unique identifier short form) 0PZ6AtZTnkO4P361gIRjJQ
GUID (Global unique identifier) 027AF6D0-53D6-439E-B83F-7EB580846325
Database ID 3953