DAnsite Mineral Data

General DAnsite Information

Chemical Formula:

Na21Mg(SO4)10Cl3

Composition:

Molecular Weight = 1,574.08 gm

Sodium 30.67 % Na 41.34 % Na₂O

Magnesium 1.54 % Mg 2.56 % MgO

Sulfur 20.37 % S 50.86 % SO₃

Chlorine 6.76 % Cl 6.76 % Cl

- % Cl -1.52 % -O=Cl₂

Oxygen 40.66 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂₁Mg(SO₄)₁₀Cl₃

Environment:

Enclosed in bloedite.

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Hall, near Innsbruck, Tyrol, Austria. Link to MinDat.org Location Data.

Name Origin:

Named for Jean D'Ans (1881-1969), German chemist, Technical University, Berlin.

Name Pronunciation:

DAnsite

Synonym:

D'Ansite

DAnsite Crystallography

Cell Dimensions:

a = 15.913, Z = 4; V = 4,029.55 Den(Calc)= 2.59

Crystal System:

Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: I 43m

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

By Intensity(I/I_o): 2.807(1), 3.384(0.95), 3.117(0.9),

Physical Properties of DAnsite

Color:

Colorless.

Density:

2.63 - 2.655, Average = 2.64

Hardness:

3 - Calcite

Streak:

white

Optical Properties of DAnsite

Gladstone-Dale:

CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1884,KPDmeas= 0.1847,KC= 0.1951
Ncalc = 1.51 - 1.52

Optical Data:

Isotropic, n=1.488.

Calculated Properties of DAnsite

Electron Density:

Bulk Density (Electron Density)=2.55 gm/cc
note: Specific Gravity of DAnsite =2.59 gm/cc.

Fermion Index:

Fermion Index = 0.0032670669
Boson Index = 0.9967329331

Photoelectric:

PE_DAnsite= 2.19 barns/electron
U=PE_DAnsite x rElectron Density= 5.59 barns/cc.

Radioactivity:

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

DAnsite Classification

Dana Class:

30.01.10.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.01)where (A B)m (XO4)p Zq where m:p>2:1

(30.01.10)Dana Group

30.01.10.01 DAnsite Na21Mg(SO4)10Cl3 I 43m 4 3m

Strunz Class:

07.BC.05 07 - SULFATES (SELENATES, TELLURATES)

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

07.BC -With medium-sized and large cations

07.BC.05 DAnsite Na21Mg(SO4)10Cl3 I 43m 4 3m

Other DAnsite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Dansite :
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
15 - WWW-MINCRYST

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Dansite

Na21Mg(SO4)10Cl3
Dana No: 30.01.10.01 Strunz No: 07.BC.05
Locality:

Notes: