Hauyne Mineral Data

Hauyne Mineral Data +

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General Hauyne Information

Chemical Formula:

(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

Composition:

Molecular Weight = 1,032.43 gm

Sodium 8.91 % Na 12.01 % Na₂O

Calcium 7.76 % Ca 10.86 % CaO

Aluminum 15.68 % Al 29.63 % Al₂O₃

Silicon 16.32 % Si 34.92 % SiO₂

Sulfur 9.32 % S

Chlorine 1.72 % Cl 1.72 % Cl

- % Cl -0.39 % -O=Cl₂

Oxygen 40.29 % O

______ ______

100.00 % 96.50 % = TOTAL OXIDE

Empirical Formula:

Na₄Ca₂Al₆Si₆O₂₂S₂(SO₄)Cl_0.5

Environment:

Igneous rocks low in silica and rich in alkalis.

IMA Status:

Valid Species (Pre-IMA) 1807

Locality:

Vesuvian lavas, on Mte Somma, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after the French crystallographer, R. J. Hauy (1743-1822).

Synonym:

Hauynite

ICSD 39952

PDF 37-473

Hauyne Image

Images:

Hauyne

Comments: Grains of deep blue hauyne crystals in matrix.
Location: Niedermendig, Eifel, Germany. Scale: Picture size 5 mm.
© John Veevaert

Hauyne Crystallography

Cell Dimensions:

a = 8.9, Z = 1; V = 704.97 Den(Calc)= 2.43

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: P 43n

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

By Intensity(I/I_o): 3.72(1), 2.63(0.5), 6.45(0.3),

Crystal Structure:

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Hassan I , Grundy H D , The Canadian Mineralogist , 29 (1991) p.123-130, The crystal structure of hauyne at 293 and 153 K, Sample: at T = 153 K, Locality: Valle Biacheela, Sacrafano, Italy

View Additional jPOWD Structure files for Hauyne
[1]

Physical Properties of Hauyne

Cleavage:

[110] Perfect, [011] Perfect, [101] Perfect

Color:

Blue, Green, Red, Yellow, Gray.

Density:

2.4 - 2.5, Average = 2.45

Diaphaniety:

Subtransparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

5-6 - Between Apatite and Orthoclase

Luminescence:

None.

Luster:

Vitreous - Greasy

Streak:

bluish white

Optical Properties of Hauyne

Gladstone-Dale:

CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2042,KPDmeas= 0.2025,KC= 0.1987

Optical Data:

Isotropic, n=1.4961.

Calculated Properties of Hauyne

Electron Density:

r_electron=2.42 gm/cc
note: r_Hauyne=2.45 gm/cc.

Fermion Index

Fermion Index = 0.00861
Boson Index = 0.99139

Photoelectric:

PE_Hauyne= 2.81 barns/electron
U=PE_Hauyne x r_electron= 6.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hauyne is Not Radioactive

Hauyne Classification

Dana Class:

76.2.3.3 (76)Tectosilicate Al-Si Framework

(76.2)Feldspathoids and related species

(76.2.3)Sodalite group

76.2.3.1 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m

76.2.3.2 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m

76.2.3.3 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m

76.2.3.4 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m

76.2.3.5 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m

76.2.3.6 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra

76.2.3.7 Tugtupite Na4AlBeSi4O12Cl I 4 4

76.2.3.8 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2

Strunz Class:

VIII/J.11-30 VIII - Silicates

VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders

VIII/J.11 - Sodalite group, Tsaregorodtsevite - Wadalite series

VIII/J.11-05 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2

VIII/J.11-10 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m

VIII/J.11-20 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m

VIII/J.11-30 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m

VIII/J.11-40 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m

VIII/J.11-50 Tugtupite Na4AlBeSi4O12Cl I 4 4

VIII/J.11-60 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra

VIII/J.11-70 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m

VIII/J.11-80 Wadalite Ca6Al5Si2O16Cl3 I 43d 4 3m

Other Hauyne Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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Hauyne

(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
Dana No: 76.2.3.3 Strunz No: VIII/J.11-30
Locality:

Notes: