Goslarite Mineral Data

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)

Environment:

Efflorescent crusts on mine timbers formed from the oxidation of sphalerite.

IMA Status:

Valid Species (Pre-IMA) 1847

Locality:

Rammelsberg mine, near Goslar, Harz, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Goslarite + Pronunciation

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 =0.9786:1:0.5653

Cell Dimensions:

a = 11.8176, b = 12.0755, c = 6.827, Z = 4; V = 974.24 Den(Calc)= 1.96

Crystal System:

Orthorhombic - Disphenoidal H-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:

Diaphaneity:

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:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Goslarite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2398,KPDmeas= 0.235,KC= 0.2431
Ncalc = 1.48 - 1.49

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:

Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Goslarite =1.96 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Goslarite= 11.38 barns/electron
U=PE_Goslarite x rElectron Density= 22.96 barns/cc.

Radioactivity:

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

Goslarite Classification

Dana Class:

29.06.11.02 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 ï¿½ x(H2O)

(29.06.11)Epsomite Group

29.06.11.01 Epsomite MgSO4•7(H2O) P 2₁2₁2₁ 2 2 2

29.06.11.02 Goslarite ZnSO4•7(H2O) P 2₁2₁2₁ 2 2 2

29.06.11.03 Morenosite NiSO4•7(H2O) P 2₁2₁2₁ 2 2 2

Strunz Class:

07.CB.40 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.40 Epsomite MgSO4•7(H2O) P 2₁2₁2₁ 2 2 2

07.CB.40 Goslarite ZnSO4•7(H2O) P 2₁2₁2₁ 2 2 2

07.CB.40 Morenosite NiSO4•7(H2O) P 2₁2₁2₁ 2 2 2

Other Goslarite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v91, p221) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Goslarite :
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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Print or Cut-and-Paste your Goslarite Specimen Label here :

Goslarite

ZnSO4•7(H2O)
Dana No: 29.06.11.02 Strunz No: 07.CB.40
Locality:

Notes:

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