Xitieshanite Mineral Data

General Xitieshanite Information

Chemical Formula:

Fe+++(SO4)(Cl)•7(H2O)

Composition:

Molecular Weight = 313.47 gm

Iron 17.82 % Fe 25.47 % Fe₂O₃

Hydrogen 4.50 % H 40.23 % H₂O

Sulfur 10.23 % S 25.54 % SO₃

Chlorine 11.31 % Cl 11.31 % Cl

- % Cl -2.55 % -O=Cl₂

Oxygen 56.14 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺(SO₄)Cl•7(H₂O)

Environment:

Oxidation zone of a lead-zinc mine.

IMA Status:

Approved IMA 1983

Locality:

Xitieshan lead-zinc mine, Qaidam basin, Qinghai, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Xitieshanite + Pronunciation

Synonym:

ICSD 65615

PDF 35-719

Xitieshanite Image

Images:

Xitieshanite

Comments: Photomicrographs of xitieshanite crystals from acid mine drainage seeps. AmMin, v90, p 1520.
Location: Green Valley, Vigo County, Indiana, USA. Scale: See Image.
© American Mineralogist

Xitieshanite Crystallography

Axial Ratios:

a:b:c =2.0414:1:1.545

Cell Dimensions:

a = 14.102, b = 6.908, c = 10.673, Z = 4; beta = 111.266° V = 968.93 Den(Calc)= 2.15

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): 4.81(1), 4.96(1), 3.9(0.9),

Physical Properties of Xitieshanite

Cleavage:

{???} Indistinct

Color:

Green, Yellow green.

Density:

1.99

Diaphaneity:

Transparent to Translucent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Xitieshanite

Gladstone-Dale:

CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.098 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2688,KPDmeas= 0.2905,KC= 0.298
Ncalc = 1.59 - 1.64

Optical Data:

Biaxial (-), a=1.536, b=1.57, g=1.628, bire=0.0920, 2V(Calc)=78, 2V(Meas)=77. Dispersion r > v.

Pleochroism (x):

colorless or pale yellow.

Pleochroism (y):

pale yellow.

Pleochroism (z):

light greenish yellow.

Calculated Properties of Xitieshanite

Electron Density:

Bulk Density (Electron Density)=2.04 gm/cc
note: Specific Gravity of Xitieshanite =1.99 gm/cc.

Fermion Index:

Fermion Index = 0.0048203772
Boson Index = 0.9951796228

Photoelectric:

PE_Xitieshanite= 6.50 barns/electron
U=PE_Xitieshanite x rElectron Density= 13.29 barns/cc.

Radioactivity:

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

Xitieshanite Classification

Dana Class:

31.09.06.03 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.09)where (A+ B++) (XO4) Zqï¿½x(H2O)

(31.09.06)Botryogen Group

31.09.06.01 Botryogen MgFe(SO4)2(OH)•7(H2O) P 2₁/n 2/m

31.09.06.02 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)•7(H2O) P 2₁/n 2/m

31.09.06.03 Xitieshanite Fe(SO4)(Cl)•7(H2O) P 2₁/a 2/m

Strunz Class:

07.DC.20 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DC -With only medium-sized cations; chains of corner-sharing octahedra

07.DC.20 Xitieshanite Fe(SO4)(Cl)•7(H2O) P 2₁/a 2/m

Other Xitieshanite Information

References:

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

See Also:

Links to other databases for Xitieshanite :
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 Xitieshanite Specimen Label here :

Xitieshanite

Fe+++(SO4)(Cl)•7(H2O)
Dana No: 31.09.06.03 Strunz No: 07.DC.20
Locality:

Notes:

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