Goslarite Mineral Data

Goslarite Mineral Data +

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General Goslarite Information

Chemical Formula:

ZnSO4·7(H2O)

Composition:

Molecular Weight = 287.56 gm

Zinc 22.74 % Zn 28.30 % ZnO

Hydrogen 4.91 % H 43.85 % H₂O

Sulfur 11.15 % S 27.84 % SO₃

Oxygen 61.20 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn(SO₄)·7(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1847

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after its original locality in Goslar, Germany

Goslarite Image

Images:

Goslarite

Comments: Pale yellow to egg-shell white fibrous goslarite with radiating structure.
Location: Rammelsberg, near Goslar, Harz Mountains, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Goslarite Crystallography

Axial Ratios:

a:b:c =0.9791:1:0.5661

Cell Dimensions:

a = 11.799, b = 12.05, c = 6.822, Z = 4; V = 969.94 Den(Calc)= 1.97

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 4.21(1), 5.36(0.8), 4.18(0.5),

Physical Properties of Goslarite

Cleavage:

[010] Perfect

Color:

Blue, Brown, Colorless, Green, Green blue.

Density:

Diaphaniety:

Transparent to Translucent

Fracture:

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

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

None.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Goslarite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2386,KPDmeas= 0.235,KC= 0.2431

Optical Data:

Biaxial (-), a=1.447-1.463, b=1.475-1.48, g=1.47-1.485, bire=0.0220-0.0230, 2V(Meas)=46. Dispersion none.

Pleochroism (x):

none.

Pleochroism (y):

non.

Calculated Properties of Goslarite

Electron Density:

r_electron=2.03 gm/cc
note: r_Goslarite=1.97 gm/cc.

Fermion Index

Fermion Index = 0.01046
Boson Index = 0.98954

Photoelectric:

PE_Goslarite= 11.38 barns/electron
U=PE_Goslarite x r_electron= 23.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Goslarite is Not Radioactive

Goslarite Classification

Dana Class:

29.6.11.2 (29)Hydrated Acid and Sulfates

(29.6)where A XO4 · x(H2O)

(29.6.11)Dana Group

29.6.11.1 Epsomite MgSO4·7(H2O) P 2₁2₁2₁ 2 2 2

29.6.11.2 Goslarite ZnSO4·7(H2O) P 2₁2₁2₁ 2 2 2

29.6.11.3 Morenosite NiSO4·7(H2O) P 2₁2₁2₁ 2 2 2

Strunz Class:

VI/C.07-30 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/C.07 - Epsomite - Goslarite series

VI/C.07-10 Epsomite MgSO4·7(H2O) P 2₁2₁2₁ 2 2 2

VI/C.07-20 Morenosite NiSO4·7(H2O) P 2₁2₁2₁ 2 2 2

VI/C.07-30 Goslarite ZnSO4·7(H2O) P 2₁2₁2₁ 2 2 2

Other Goslarite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Goslarite Specimen Label here :

Goslarite

ZnSO4·7(H2O)
Dana No: 29.6.11.2 Strunz No: VI/C.07-30
Locality:

Notes: