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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

(Co-)Type locality

(Co-)Type locality

Italien/Latium (Lazio), Region/Rom, Provinz/Trevignano Romano/Torre Stracciacappe

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

IDs

GUSID (Global unique identifier short form) 1o9wViaorU2FehWd4w5dEQ
GUID (Global unique identifier) 56708FD6-A826-4DAD-857A-159DE30E5D11
Database ID 4935