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Fantappièite

Pictures (1 Images total)

Fantappièit
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Fantappièit
farblos-weißer Fantappièit-Kristall, Biachella-Tal, Sacrofano, Rom Provinz, Latium, Italien; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Biachella-Tal
Mineral: Fantappièite
Image: 1587890511
License: Usage for Mineralienatlas project only
Fantappièit

farblos-weißer Fantappièit-Kristall, Biachella-Tal, Sacrofano, Rom Provinz, Latium, Italien; BB < 1 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-26
Locality: Biachella-Tal / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Hardness (Mohs) 6
Cleavages undeutlich (001)
Fracture muschelig
Crystal System trigonal, P3

Chemism

Chemical formula

[Na82.5Ca33K16.5](Si99Al99O396)(SO4)33·4H2O

Additional chem. information

Cancrinit Gruppe

Chemical composition

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

Unit weight: 18893.9269443 u; Number of atoms in the formula: 903

Info

Empirical formula:

[Na82.5Ca33K16.5](Si99Al99O396)(SO4)33·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.04

8

0.89

1.0079470

8.0635760

Oxygen

O

45.05

532

58.91

15.9994300

8,511.6967600

Sodium

Na

10.04

82.5

9.14

22.9897702

1,896.6560415

Aluminium

Al

14.14

99

10.96

26.9815382

2,671.1722818

Silicon

Si

14.72

99

10.96

28.0855300

2,780.4674700

Sulfur

S

5.60

33

3.65

32.0655000

1,058.1615000

Potassium

K

3.41

16.5

1.83

39.0983100

645.1221150

Calcium

Ca

7.00

33

3.65

40.0784000

1,322.5872000

Analysis wt%

SO3 : 13.06, SiO2 : 32.19, Al2O3 : 27.12, CaO : 9.07, Na2O : 14.06, K2O : 4.05, H2O : 0.50 (Ref: American Mineralogist 2010)

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.09-036

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

Classification by Hölzel

9.FE.770

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
7: Giuseppettite-Group - trigonal, axis a~~12A and c=n*~~5A, n>5

Dana 8th edition

76.02.09.20

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

IMA status

anerkannt 05.2008

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.002

Birefringence chart\! Fantappièite title=Birefringence chart Fantappièite

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

1.505

RI value γ / ε

1.503

Ri mean

1.504

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

147

Space Group

P3

Cell parameters a (Å)

12.874

Cell parameters b (Å)

-

Cell parameters c (Å)

87.215

Cell parameters a/b or c/a

6.775

Cell parameters c/b

-

Z

1

Volumne (ų)

12518.4

X-Ray Powder Diffraction

6.85(66), 6.39(65), 5.74(52), 3.773(60), 3.691(100), 3.587(70), 3.551(53), 2.639(73)

XRD chart Fantappièite

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)

6

VHN (Hardness Vickers)

720 (10g)

Density (g/cm³)

2.471 berechnet

2.506 ( ρ calc. Mineralienatlas )

Cleavages

undeutlich (001)

Fracture

muschelig

Tenacity

spröde

Preface

Author (Name, Year)

Fernando Cámara et al., 2010

References

Fernando Cámara, Fabio Bellatreccia, Giancarlo Della Ventura, Annibale Mottana, Luca Bindi, Mickey E. Gunter, and Marco Sebastiani: Fantappièite, a new mineral of the cancrinite-sodalite group with a 33-layer stacking sequence: Occurrence and crystal structure. American Mineralogist 95 (2010) S. 472-480.

Neue Mineralien Mai 2008, IMA WEB Seite

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

Other languages

German

Fantappièit

English

Fantappièite

CNMNC (IMA)-Number

IMA 2008-006

CNMNC symbol

Symbol

Ftp