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Pitiglianoite

Pictures (2 Images total)

Pitigianoit xx als klare langtafelige xx
Views (File:
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Pitigianoit xx als klare langtafelige xx
Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien; Bildbreite:3mm
Copyright: loismin; Contribution: loismin
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Pitiglianoite
Image: 1142508991
Rating: 4.5 (votes: 2)
License: Usage for Mineralienatlas project only
Pitigianoit xx als klare langtafelige xx

Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien; Bildbreite:3mm

Copyright: loismin
Contribution: loismin 2006-03-16
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Pitiglianoit
Views (File:
1271683474
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Pitiglianoit
Bildbreite: 2 mm, Fundort: Mt Cavalluccio, Sacrofano Caldera, Latium, Italien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Mt. Cavalluccio
Mineral: Pitiglianoite
Image: 1271683474
License: Usage for Mineralienatlas project only
Pitiglianoit

Bildbreite: 2 mm, Fundort: Mt Cavalluccio, Sacrofano Caldera, Latium, Italien

Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-19
Locality: Mt. Cavalluccio / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Color weiß durchsichtig
Streak color weiß
Hardness (Mohs) 5
Cleavages keine
Fracture halbmuschelig
Crystal System hexagonal, P63

Chemism

Chemical formula

Na6K2Si6Al6O24(SO4)·2H2O

Chemical composition

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

Unit weight: 1062.6178384 u; Number of atoms in the formula: 55

Info

Empirical formula:

Na6K2Si6Al6O24(SO4)·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.38

4

7.27

1.0079470

4.0317880

Oxygen

O

45.17

30

54.55

15.9994300

479.9829000

Sodium

Na

12.98

6

10.91

22.9897702

137.9386212

Aluminium

Al

15.23

6

10.91

26.9815382

161.8892292

Silicon

Si

15.86

6

10.91

28.0855300

168.5131800

Sulfur

S

3.02

1

1.82

32.0655000

32.0655000

Potassium

K

7.36

2

3.64

39.0983100

78.1966200

Analysis wt%

SiO2 : 34.99, Al2O3 : 29.05, Na2O : 17.10, K2O : 9.41, SO3 : 7.58, H2O : 3.46 (Ref: American Mineralogist 91)

Strunz 9th edition incl. updates

9.FB.05

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
05:Cancrinit-Gruppe

Lapis Classification

VIII/J.09-065

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
9: Mit tetraederfremden Anionen; Cancrinit-Gruppe

Classification by Hölzel

9.FE.320

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
3: Microsommite-Group - hexagonal, axis for a~~23A and c~~5A

Dana 8th edition

76.02.05.11

76: Tektosilicates Tectosilicate Al-Si Framework
02: Tektosilicates Tectosilicate Al-Si Framework Feldspathoids and related species
05: Cancrinite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Cancrinit–Sodalit supergroup  ⇒ Cancrinite Group  ⇒ Cancrinite Subgroup

Optical Properties

Color

weiß durchsichtig

Streak color

weiß

max. Birefringence

0.002

Birefringence chart\! Pitiglianoite title=Birefringence chart Pitiglianoite

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

1.508

RI value γ / ε

1.506

Ri mean

1.507

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6

Space Group number

173

Space Group

P63

Cell parameters a (Å)

22.121

Cell parameters b (Å)

-

Cell parameters c (Å)

5.221

Cell parameters a/b or c/a

0.236

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

3

Volumne (ų)

2212.554

X-Ray Powder Diffraction

6.39(80),
5.54(20),
4.77(100),
4.19(20),
3.69(50),
3.27(100),
2.769(50),
2.650(50)

XRD chart Pitiglianoite

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

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.37 (gemessen)

2.392 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

halbmuschelig

Tenacity

spröde

Preface

Author (Name, Year)

Merlino & Mellini & Bonaccorsi & Pasero & Leoni & Orlandi, 1991

References

American Mineralogist 76 (1991), 2003

IMA group assignments

Other languages

German

Pitiglianoit

Spanish

Pitiglianoita

French

Pitiglianoite

English

Pitiglianoite

Russian

Питильяноит

CNMNC (IMA)-Number

IMA 1990-012

CNMNC symbol

Symbol

Pgl

Locations with GPS information