Dussertite Mineral Data

Dussertite Mineral Data +

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General Dussertite Information

Chemical Formula:

BaFe+++3(AsO4)2(OH)5

Composition:

Molecular Weight = 667.74 gm

Barium 20.57 % Ba 22.96 % BaO

Iron 25.09 % Fe 35.87 % Fe₂O₃

Arsenic 22.44 % As 34.42 % As₂O₅

Hydrogen 0.75 % H 6.74 % H₂O

Oxygen 31.15 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaFe³⁺₃(AsO₄)₂(OH)₅

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 88934

PDF 35-621

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Dussertite Crystallography

Axial Ratios:

a:c = 1:2.35628

Cell Dimensions:

a = 7.4244, c = 17.494, Z = 3; V = 835.11 Den(Calc)= 3.98

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m

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

By Intensity(I/I_o): 3.132(1), 2.3293(0.4), 3.713(0.3),

Crystal Structure:

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Kolitsch U , Slade P G , Tiekink E R T , Pring A , Mineralogical Magazine , 63 (1999) p.17-26, The structure of antimonian dussertite, and the role of antimony in oxysalt minerals, Locality: Clara mine, Black Forest, Germany

Physical Properties of Dussertite

Color:

Green, Yellow green.

Density:

3.75

Diaphaniety:

Transparent to Translucent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous - Resinous

Optical Properties of Dussertite

Gladstone-Dale:

CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2161,KPDmeas= 0.2293,KC= 0.2211

Optical Data:

Uniaxial (-), e=1.85, w=1.87, bire=0.0200.

Calculated Properties of Dussertite

Electron Density:

r_electron=3.68 gm/cc
note: r_Dussertite=3.98 gm/cc.

Fermion Index

Fermion Index = 0.04212
Boson Index = 0.95788

Photoelectric:

PE_Dussertite= 112.67 barns/electron
U=PE_Dussertite x r_electron= 415.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dussertite is Not Radioactive

Dussertite Classification

Dana Class:

41.5.10.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.5)where (A B)2 (XO4) Zq

(41.5.10)Dana Group

41.5.10.1 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m

41.5.10.2 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m

41.5.10.3 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

41.5.10.4 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

Strunz Class:

VII/B.36-160 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.36 - Crandallite group

VII/B.36-10 Crandallite CaAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-20 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5·(H2O) R 3m 3m

VII/B.36-30 Goyazite SrAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-40 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) R 3m 3 2/m

VII/B.36-50 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 Cm m

VII/B.36-60 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m

VII/B.36-70 Plumbogummite PbAl3(PO4)2(OH)5·(H2O) R 3m 3 2/m

VII/B.36-80 Philipsbornite PbAl3(AsO4)2(OH)5·(H2O) R 3m-,R 3m Trig

VII/B.36-90 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-100 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m

VII/B.36-110 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-120 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m

VII/B.36-125 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m

VII/B.36-130 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-135 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m

VII/B.36-140 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-150 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

VII/B.36-150* Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5·(H2O) R 3m 3m

VII/B.36-152 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m

VII/B.36-155 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

VII/B.36-160 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m

VII/B.36-170 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m

Other Dussertite Information

References:

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

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Dussertite

BaFe+++3(AsO4)2(OH)5
Dana No: 41.5.10.1 Strunz No: VII/B.36-160
Locality:

Notes: