Bukovskyite Mineral Data

Bukovskyite Mineral Data +

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General Bukovskyite Information

Chemical Formula:

Fe+++2(AsO4)(SO4)(OH)·7(H2O)

Composition:

Molecular Weight = 489.79 gm

Iron 22.80 % Fe 29.34 % FeO

Arsenic 15.30 % As 23.46 % As₂O₅

Hydrogen 3.09 % H 27.59 % H₂O

Sulfur 6.55 % S 16.35 % SO₃

Oxygen 52.27 % O

______ ______

100.00 % 96.73 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₂(AsO₄)(SO₄)(OH)·7(H₂O)

Environment:

An alteration product of arsenopyrite.

IMA Status:

Approved IMA 1967

Locality:

Kank, near Kutna Hora, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named after the Czech chemist, Antonin Bukovsky (1865-1950).

Bukovskyite Image

Images:

Bukovskyite Zykaite

Comments: Pale beige acicular crystals of bukovsk?ite with white zykaite.
Location: Christbescherung Mine, Gro?voigtsberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Bukovskyite Crystallography

Axial Ratios:

a:b:c =0.7615:1:0.7304

Cell Dimensions:

a = 10.722, b = 14.079, c = 10.284, Z = 4; alpha = 93.5°, beta = 115.96°, gamma = 90.27° V = 1,393.16 Den(Calc)= 2.34

Crystal System:

TriclinicSpace Group: P1 or P1

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

By Intensity(I/I_o): 9.2(1), 9.6(1), 3.9(0.7),

Physical Properties of Bukovskyite

Cleavage:

None

Color:

Light yellow, Orange, Greenish gray.

Density:

2.34

Fracture:

Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

5 - Apatite

Luster:

Vitreous - Dull

Streak:

yellowish white

Optical Properties of Bukovskyite

Gladstone-Dale:

CI meas= -0.192 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.192 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2574,KPDmeas= 0.2574,KC= 0.2159

Optical Data:

Biaxial (+), b=1.57-1.582, g=1.626-1.631,

Calculated Properties of Bukovskyite

Electron Density:

r_electron=2.33 gm/cc
note: r_Bukovskyite=2.34 gm/cc.

Fermion Index

Fermion Index = 0.00558
Boson Index = 0.99442

Photoelectric:

PE_Bukovskyite= 17.10 barns/electron
U=PE_Bukovskyite x r_electron= 39.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bukovskyite is Not Radioactive

Bukovskyite Classification

Dana Class:

43.5.1.2 (43)Compound Phosphates, etc.

(43.5)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.5.1)Dana Group

43.5.1.1 Sarmientite Fe2(AsO4)(SO4)(OH)·5(H2O) P 2₁/c 2/m

43.5.1.2 Bukovskyite Fe2(AsO4)(SO4)(OH)·7(H2O) P1 or P1 Tri

43.5.1.3 Sanjuanite Al2(PO4)(SO4)(OH)·9(H2O) P1 or P1 Tri

Strunz Class:

VII/D.05-40 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.05 - Pitticite - Zykaite series

VII/D.05-10 Pitticite Hydrousferricarsenatesulfate(Fe,AsO4,SO4,H2O) None

VII/D.05-20 Diadochite Fe2(PO4)(SO4)(OH)·6(H2O) P1 1

VII/D.05-30 Sarmientite Fe2(AsO4)(SO4)(OH)·5(H2O) P 2₁/c 2/m

VII/D.05-40 Bukovskyite Fe2(AsO4)(SO4)(OH)·7(H2O) P1 or P1 Tri

VII/D.05-50 Tooeleite Fe(8-2x)[(As(1-x),S(x))O4]6·5(H2O) Pbcm,Pbc21 Ortho

VII/D.05-60 Zykaite Fe4(AsO4)3(SO4)(OH)·15(H2O) Unk Ortho

Other Bukovskyite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Bukovskyite :
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 -École des Mines de Paris

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Bukovskyite

Fe+++2(AsO4)(SO4)(OH)·7(H2O)
Dana No: 43.5.1.2 Strunz No: VII/D.05-40
Locality:

Notes: