Stenhuggarite Mineral Data

Stenhuggarite Mineral Data +

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General Stenhuggarite Information

Chemical Formula:

CaFe+++(As+++O2)(As+++Sb+++O5)

Composition:

Molecular Weight = 479.51 gm

Calcium 8.36 % Ca 11.69 % CaO

Iron 11.65 % Fe 16.65 % Fe₂O₃

Antimony 25.39 % Sb 30.40 % Sb₂O₃

Arsenic 31.25 % As 41.26 % As₂O₃

Oxygen 23.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaFe³⁺As₂SbO₇

Environment:

Very rare in hematite ore from a metamorphosed Fe-Mn orebody.

IMA Status:

Approved IMA 1968

Locality:

Långban mine, Bergslagen ore distr., Filipstad, Värmland (Wermland), Sweden. Link to MinDat.org Location Data.

Name Origin:

Named from the Swedish for "stonemason", in honor of Brian Harold Mason (1917-), U.S. National Museum, Washington, D.C., USA for his Langban deposit studies.

Synonym:

ICSD 965

PDF 24-199

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Stenhuggarite Crystallography

Axial Ratios:

a:c = 1:0.66301

Cell Dimensions:

a = 16.075, c = 10.658, Z = 16; V = 2,754.09 Den(Calc)= 4.63

Crystal System:

Tetragonal - PyramidalH-M Symbol (4) Space Group: I 4₁

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

By Intensity(I/I_o): 2.985(1), 1.845(0.4), 2.548(0.35),

Crystal Structure:

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Coda A , Dal Negro A , Sabelli C , Tazzoli V , Acta Crystallographica, Section B , 33 (1977) p.1807-1811, The crystal structure of stenhuggarite

Physical Properties of Stenhuggarite

Cleavage:

None

Color:

Bright reddish orange.

Density:

4.63

Diaphaniety:

Transparent to Translucent

Fracture:

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

Habit:

Equant Grains - Granular material with equel dimensions in x, y, and z.

Habit:

Pseudo Octohedral - Crystals show an octohedral outline.

Hardness:

4.5 - Between Fluorite and Apatite

Streak:

light yellow

Optical Properties of Stenhuggarite

Gladstone-Dale:

CI meas= 0.084 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.216,KPDmeas= 0.216,KC= 0.2357

Optical Data:

Uniaxial (?), a=2.

Calculated Properties of Stenhuggarite

Electron Density:

r_electron=4.23 gm/cc
note: r_{Stenhuggarite}=4.63 gm/cc.

Fermion Index

Fermion Index = 0.00269
Boson Index = 0.99731

Photoelectric:

PE_{Stenhuggarite}= 108.68 barns/electron
U=PE_{Stenhuggarite} x r_electron= 459.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stenhuggarite is Not Radioactive

Stenhuggarite Classification

Dana Class:

46.1.4.1 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites

(46.1)where (A B)m (XO3)p Zq

(46.1.4)Dana Group

46.1.4.1 Stenhuggarite CaFe(AsO2)(AsSbO5) I 4₁ 4

Strunz Class:

IV/J.06-10 IV - Oxides

IV/J - Arsenides with [AsO3]3-, [AsO2]-, [As2O5]4- groups and unclassified Arsenides

IV/J.06 - Stenhuggarite - Lazarenkoite series

IV/J.06-10 Stenhuggarite CaFe(AsO2)(AsSbO5) I 4₁ 4

IV/J.06-20 Lazarenkoite CaFeAs3O7·3(H2O) Unk Ortho

IV/J.06-25 Vajdakite! [(MoO2)2(H2O)2As2O5]·(H2O) P 2₁/c 2/m

Other Stenhuggarite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

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

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Stenhuggarite

CaFe+++(As+++O2)(As+++Sb+++O5)
Dana No: 46.1.4.1 Strunz No: IV/J.06-10
Locality:

Notes: