Panichiite Mineral Data

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General Panichiite Information

Chemical Formula:

(NH4)2SnCl6

Composition:

Molecular Weight = 371.89 gm

Potassium 1.05 % K 1.27 % K₂O

Tin 31.60 % Sn 40.12 % SnO₂

Hydrogen 2.06 % H - % Calc as (NH₄)₂O

Bromine 1.50 % Br 1.50 % Br

- % Br -0.15 % -O=Br₂

Nitrogen 7.16 % N 13.30 % (NH₄)₂O

Chlorine 56.63 % Cl 56.63 % Cl

- % Cl -12.78 % -O=Cl₂

______ ______

100.00 % 99.89 % = TOTAL OXIDE

Empirical Formula:

(NH₄)_1.9K_0.1Sn_0.99Cl_5.94Br_0.07

Environment:

Found in a medium-temperature intracrater fumarole (~250°C).

IMA Status:

Approved IMA 2008 (Dana # Added)

Locality:

La Fossa crater, Vulcano, Aeolian Islands, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Ugo Panichi, a pioneer in the study of minerals from Vulcano.

Synonym:

Ammonium hexachlorostannate

IMA2008-005

Panichiite Image

Images:

Panichiite

Comments: BSE image of octahedral panichiite crystals on alunite. (CanMin, v47:367).
Location: La Fossa crater, Vulcano, Aeolian Islands, Italy. Scale: See Image.
© Canadian Mineralogist

Panichiite Crystallography

Cell Dimensions:

a = 10.064, Z = 4; V = 1,019.32 Den(Calc)= 2.42

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: Fm3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.811(1), 5.032(0.73), 2.516(0.69),3.035(0.48), 1.779(0.42), 2.25(0.39), 1.937(0.23), 1.701(0.22),

Crystal Structure:

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Demartin F , Campostrini I , Gramaccioli C M , The Canadian Mineralogist , 47 (2009) p.367-372, Panichiite, natural ammonium hexachlorostannate(IV), (NH4)2SnCl6,, from La Fossa crater, Vulcano, Aeolian Islands, Italy, Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy

Physical Properties of Panichiite

Cleavage:

None

Color:

Colorless, White, Very pale yellow.

Density:

2.43

Diaphaneity:

Transparent

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Panichiite

Optical Data:

Isotropic, n=1.68.

Calculated Properties of Panichiite

Electron Density:

Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Panichiite =2.42 gm/cc.

Fermion Index:

Fermion Index = 0.12
Boson Index = 0.88

Photoelectric:

PE_Panichiite= 97.30 barns/electron
U=PE_Panichiite x r_electron= 222.53 barns/cc.

Radioactivity:

GRapi = 14.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Panichiite per GRapi unit = 6.97 (%)

Estimated Radioactivity from Panichiite - barely detectable

Panichiite Classification

Dana Class:

11.05.08.04 (11)Halide Complexes; Alumino-fluorides

(11.05)where (A)m B (X)6

(11.05.08)Challacolloite Group

11.05.08.01 Challacolloite! KPb2Cl5 P 2₁/c 2/m

11.05.08.02 Hephaistosite! TlPb2Cl5 P 2₁/c 2/m

11.05.08.03 Steropesite! Tl3BiCl6 Cc m

11.05.08.04 Panichiite! (NH4)2SnCl6 Fm3m 4 3m

Strunz Class:

03.AA. 03 - HALIDES

03.A - Simple Halides, Without H2O

03.AA -M:X = 1:1, 2:3, 3:5, etc.

03.AA. Panichiite! (NH4)2SnCl6 Fm3m 4 3m

Other Panichiite Information

References:

NAME( CanMin, v47:367) PHYS. PROP.(CanMin, v47:367) OPTIC PROP.(CanMin, v47:367)

See Also:

Links to other databases for Panichiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Panichiite using:

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Ask about Panichiite here :
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Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Panichiite Specimen Label here :

Panichiite

(NH4)2SnCl6
Dana No: 11.05.08.04 Strunz No: 03.AA.
Locality:

Notes: