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

Environment:

Oxidized zone of some base-metal deposits, typically an alteration product of arsenopyrite.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Djebel Debar, northeast of Hammam Meskhoutine, Qacentina (Constantine), Algeria. Link to MinDat.org Location Data.

Name Origin:

Named for Desire Dussert (1872-?), French mining engineer who worked in Algeria.

Name Pronunciation:

Dussertite + Pronunciation

Synonym:

ICSD 88934

PDF 35-621

Dussertite Image

Images:

Dussertite

Comments: Light green hexagonal plates of dussertite lining vug associated with quartz and pharmacosiderite.
Location: Clara mine, Rankach Valley, Oberwolfach, Wolfach, Black Forest, Baden-Wurttemberg, Germany. Scale: See Image.
© Rruff Database

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

Diaphaneity:

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
Ncalc = 1.83 - 1.88

Optical Data:

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

Calculated Properties of Dussertite

Electron Density:

Bulk Density (Electron Density)=3.68 gm/cc
note: Specific Gravity of Dussertite =3.98 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Dussertite= 112.67 barns/electron
U=PE_Dussertite x rElectron Density= 415.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dussertite is Not Radioactive

Dussertite Classification

Dana Class:

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

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

(41.05.10)Dussertite Group

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

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

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

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

Strunz Class:

08.BL.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1

08.BL.10 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m

08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m

08.BL.10 Ferrazite? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri

08.BL.10 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m

08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 3 2/m

08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m

08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m

08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m

08.BL.10 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m

08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig

08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m

08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

Other Dussertite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Dussertite :
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
15 - WWW-MINCRYST

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Dussertite

BaFe+++3(AsO4)2(OH)5
Dana No: 41.05.10.01 Strunz No: 08.BL.10
Locality:

Notes: