Hectorfloresite Mineral Data

General Hectorfloresite Information

Chemical Formula:

Na9(IO3)(SO4)4

Composition:

Molecular Weight = 766.06 gm

Sodium 27.01 % Na 36.41 % Na₂O

Sulfur 16.74 % S 41.81 % SO₃

Iodine 16.57 % I 21.79 % I₂O₅

Oxygen 39.68 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₉(IO₃)(SO₄)₄

IMA Status:

Approved IMA 1989

Locality:

Alianza nitrate mine, Oficina Victoria, Tarapaca, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Hector Flores W. (1906-1984), Chilean geologist, University of Chile.

Name Pronunciation:

Hectorfloresite + Pronunciation

Hectorfloresite Image

Images:

Hectorfloresite

Comments: Prismatic twinned crystal of hectorfloresite.
Location: Pampa Rica, Antofagasta, Chile. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Hectorfloresite Crystallography

Axial Ratios:

a:b:c =2.707:1:2.053

Cell Dimensions:

a = 18.775, b = 6.9356, c = 14.239, Z = 4; beta = 108.91° V = 1,754.07 Den(Calc)= 2.90

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 3.88(1), 2.7(0.8), 2.788(0.3),

Physical Properties of Hectorfloresite

Cleavage:

None

Color:

Colorless, White.

Density:

2.8 - 2.85, Average = 2.82

Diaphaneity:

Transparent

Fracture:

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

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

2 - Gypsum

Streak:

white

Optical Properties of Hectorfloresite

Gladstone-Dale:

CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1767,KPDmeas= 0.1814,KC= 0.1857
Ncalc = 1.52 - 1.54

Optical Data:

Biaxial (-), a=1.493, b=1.521, g=1.523, bire=0.0300, 2V(Calc)=28, 2V(Meas)=26.

Calculated Properties of Hectorfloresite

Electron Density:

Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Hectorfloresite =2.83 gm/cc.

Fermion Index:

Fermion Index = 0.0014462148
Boson Index = 0.9985537852

Photoelectric:

PE_{Hectorfloresite}= 59.55 barns/electron
U=PE_{Hectorfloresite} x rElectron Density= 161.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hectorfloresite is Not Radioactive

Hectorfloresite Classification

Dana Class:

32.01.02.01 (32)Compound Sulfates

(32.01)(anhydrous) with simple bi-anionic formula

(32.01.02)Dana Group

32.01.02.01 Hectorfloresite Na9(IO3)(SO4)4 P 2₁/a 2/m

Strunz Class:

07.BD.60 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BD -With only large cations

07.BD.60 Hectorfloresite Na9(IO3)(SO4)4 P 2₁/a 2/m

Other Hectorfloresite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p1207-1214,1989) OPTIC PROP.(Am.Min.,Vol.74,p1207-1214,1989)

See Also:

Links to other databases for Hectorfloresite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Hectorfloresite

Na9(IO3)(SO4)4
Dana No: 32.01.02.01 Strunz No: 07.BD.60
Locality:

Notes:

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