Schoenfliesite Mineral Data

Schoenfliesite Mineral Data +

General Schoenfliesite Information

Chemical Formula:

MgSn++++(OH)6

Composition:

Molecular Weight = 245.06 gm

Magnesium 9.92 % Mg 16.45 % MgO

Tin 48.44 % Sn 61.50 % SnO₂

Hydrogen 2.47 % H 22.05 % H₂O

Oxygen 39.17 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MgSn(OH)₆

Environment:

Secondary mineral in oxidized tin-bearing materials.

IMA Status:

Approved IMA 1971

Locality:

Brooks Mountain, Seward Peninsula, Alaska. Link to MinDat.org Location Data.

Name Origin:

Named for Arthur Moritz Schoenflies (1853-1928), professor of mathematics, University of Frankfurt.

Synonym:

ICSD 25824

PDF 27-Sep

Schoenfliesite Image

Images:

Schoenfliesite

Comments: Yellow-brown schoenfliesite on matrix.
Location: Zlaty Kopec, J?chymov (St Joachimsthal), Krusn? Hory (Erzgebirge), Z?padocesk? Kraj, Bohemia, Czech Republic. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Schoenfliesite Crystallography

Cell Dimensions:

a = 7.759, Z = 4; V = 467.11 Den(Calc)= 3.48

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P n3

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

By Intensity(I/I_o): 3.88(1), 4.48(0.5), 2.74(0.25),

Crystal Structure:

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Basciano L C , Peterson R C , Roeder P L , The Canadian Mineralogist , 36 (1998) p.1203-1210, Description of schoenfliesite, MgSn(OH)6, and roxbyite, Cu1.72S, from a 1375 BC shipwreck,, and rietveld neutron-diffraction refinement of synthetic schoenfliesite, wickmanite,, MnSn(OH)6, and burtite, CaSn(OH)6, Locality: a 1375 BC shipwreck

Physical Properties of Schoenfliesite

Cleavage:

None

Color:

Reddish brown.

Density:

3.483

Diaphaniety:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Habit:

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

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Schoenfliesite

Gladstone-Dale:

CI meas= 0.135 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.134 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1695,KPDmeas= 0.1694,KC= 0.1958

Optical Data:

Isotropic, n=1.59.

Calculated Properties of Schoenfliesite

Electron Density:

r_electron=3.29 gm/cc
note: r_{Schoenfliesite}=3.48 gm/cc.

Fermion Index

Fermion Index = 0.09061
Boson Index = 0.90939

Photoelectric:

PE_{Schoenfliesite}= 141.23 barns/electron
U=PE_{Schoenfliesite} x r_electron= 465.29 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Schoenfliesite is Not Radioactive

Schoenfliesite Classification

Dana Class:

6.3.6.2 (6)Hydroxides and Oxides Containing Hydroxyl

(6.3)with (OH)3 or (OH)6 groups

(6.3.6)Wickmanite group (Cubic or Trigonal, 2+ cations containing Sn)

6.3.6.1 Wickmanite MnSn(OH)6 P n3m 4/m 3 2/m

6.3.6.2 Schoenfliesite MgSn(OH)6 P n3 2/m 3

6.3.6.3 Natanite FeSn(OH)6 P n3m 4/m 3 2/m

6.3.6.4 Vismirnovite ZnSn(OH)6 P n3m 4/m 3 2/m

6.3.6.5 Burtite CaSn(OH)6 R 3 3

6.3.6.6 Mushistonite (Cu,Zn,Fe)Sn(OH)6 P n3m 4/m 3 2/m

Strunz Class:

IV/F.16-10 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.16 - Schoenfliesite group

IV/F.16-10 Schoenfliesite MgSn(OH)6 P n3 2/m 3

IV/F.16-20 Burtite CaSn(OH)6 R 3 3

IV/F.16-30 Wickmanite MnSn(OH)6 P n3m 4/m 3 2/m

IV/F.16-40 Natanite FeSn(OH)6 P n3m 4/m 3 2/m

IV/F.16-50 Mushistonite (Cu,Zn,Fe)Sn(OH)6 P n3m 4/m 3 2/m

IV/F.16-60 Vismirnovite ZnSn(OH)6 P n3m 4/m 3 2/m

Other Schoenfliesite Information

References:

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

See Also:

Links to other databases for Schoenfliesite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Schoenfliesite

MgSn++++(OH)6
Dana No: 6.3.6.2 Strunz No: IV/F.16-10
Locality:

Notes: