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 % Fe2 O3
Hydrogen 4.50 % H 40.23 % H2 O
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(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEXitieshanite = 6.50 barns/electronU=PEXitieshanite x r Electron 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) Zq�x(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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Xitieshanite
Fe+++(SO4)(Cl)•7(H2O)
Dana No: 31.09.06.03 Strunz No: 07.DC.20
Locality:
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