Dietrichite Mineral Data

Dietrichite Mineral Data +

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General Dietrichite Information

Chemical Formula:

(Zn,Fe++,Mn)Al2(SO4)4·22(H2O)

Composition:

Molecular Weight = 896.04 gm

Manganese 0.61 % Mn 0.79 % MnO

Aluminum 6.02 % Al 11.38 % Al₂O₃

Zinc 4.38 % Zn 5.45 % ZnO

Iron 1.87 % Fe 2.41 % FeO

Hydrogen 4.95 % H 44.23 % H₂O

Sulfur 14.31 % S 35.74 % SO₃

Oxygen 67.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn_0.6Fe²⁺_0.3Mn²⁺_0.1Al₂(SO₄)₄·22(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1878

Locality:

Link to MinDat.org Location Data.

Dietrichite Image

Images:

Dietrichite

Comments: Pale beige fibrous dietrichite.
Location: Baia Sprie, Transylvania, Maramures, Romania. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dietrichite Crystallography

Axial Ratios:

a:b:c =0.2553:1:0.8749

Cell Dimensions:

a = 6.24, b = 24.434, c = 21.379, Z = 4; beta = 100.1° V = 3,209.10 Den(Calc)= 1.85

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 3.52(1), 4.33(1), 4.84(0.4),

Crystal Structure:

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Ballirano P , Bellatreccia F , Grubessi O , European Journal of Mineralogy , 15 (2003) p.1043-1049, New crystal-chemical and structural data of dietrichite,, ideally ZnAl2(SO4)4*22H2O, a member of the halotrichite group

Physical Properties of Dietrichite

Color:

Brownish yellow, Gray white.

Density:

1.8

Diaphaniety:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Dietrichite

Gladstone-Dale:

CI meas= -0.061 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.26,KPDmeas= 0.2672,KC= 0.2519

Optical Data:

Biaxial (+), a=1.475, b=1.48, g=1.488, bire=0.0130, 2V(Calc)=78, 2V(Meas)=70.

Calculated Properties of Dietrichite

Electron Density:

r_electron=1.93 gm/cc
note: r_Dietrichite=1.85 gm/cc.

Fermion Index

Fermion Index = 0.00359
Boson Index = 0.99641

Photoelectric:

PE_Dietrichite= 3.84 barns/electron
U=PE_Dietrichite x r_electron= 7.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dietrichite is Not Radioactive

Dietrichite Classification

Dana Class:

29.7.3.4 (29)Hydrated Acid and Sulfates

(29.7)where A (B)2 (XO4)4 · x(H2O)

(29.7.3)Halotrichite Group (Monoclinic with 22 H2O)

29.7.3.1 Pickeringite MgAl2(SO4)4·22(H2O) P 2 2

29.7.3.2 Halotrichite FeAl2(SO4)4·22(H2O) P 2 2

29.7.3.3 Apjohnite MnAl2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.4 Dietrichite (Zn,Fe,Mn)Al2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.5 Bilinite FeFe2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.6 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O) Mono

29.7.3.7 Wupatkiite (Co,Mg,Ni)Al2(SO4)4·22(H2O) P 2₁/c 2/m

Strunz Class:

VI/C.12-40 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size

VI/C.12 - Halotrichite group, Pickeringite - Bilinite

VI/C.12-10 Pickeringite MgAl2(SO4)4·22(H2O) P 2 2

VI/C.12-12 Wupatkiite (Co,Mg,Ni)Al2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-20 Halotrichite FeAl2(SO4)4·22(H2O) P 2 2

VI/C.12-30 Apjohnite MnAl2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-40 Dietrichite (Zn,Fe,Mn)Al2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-50 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O) Mono

VI/C.12-60 Bilinite FeFe2(SO4)4·22(H2O) P 2₁/c 2/m

Other Dietrichite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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Dietrichite

(Zn,Fe++,Mn)Al2(SO4)4·22(H2O)
Dana No: 29.7.3.4 Strunz No: VI/C.12-40
Locality:

Notes: