Misenite Mineral Data

General Misenite Information

Chemical Formula:

K8H8(SO4)7 (?)

Composition:

Molecular Weight = 991.28 gm

Potassium 31.55 % K 38.01 % K₂O

Hydrogen 0.61 % H 5.45 % H₂O

Sulfur 22.64 % S 56.54 % SO₃

Oxygen 45.19 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₈H₆(SO₄)₇

Environment:

Found as a transient efflorescence in a fumarole.

IMA Status:

Valid Species (Pre-IMA) 1849

Locality:

Cape Miseno, near Naples, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Misenite

Misenite Image

Images:

Misenite

Comments: Colorless absolutely transparent misenite microcrystal (blue box), on white and orange halite..
Location: Cerros Pintados, Pampa del Tamarugal, Iquique Province, TarapacÃ¡ Region, Chile. Scale: Approximately 0.05 cm crystal.
© Jeff Weissman / Photographic Guide to Mineral Species

Misenite Crystallography

Axial Ratios:

a:b:c =3.2376:1:1.226

Cell Dimensions:

a = 23, b = 7.104, c = 8.71, Z = 2; beta = 102.66° V = 1,388.54 Den(Calc)= 2.37

Crystal System:

Monoclinic

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

By Intensity(I/I_o): 4.24(1), 3.65(0.6), 4.83(0.4),4.92(0.4), 2.89(0.3), 3.49(0.3), 3.95(0.3), 2.35(0.2),

Physical Properties of Misenite

Cleavage:

{010} Distinct

Color:

Colorless, Grayish white.

Density:

2.32

Diaphaneity:

Transparent to Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Luster:

Silky - Pearly

Streak:

white

Optical Properties of Misenite

Gladstone-Dale:

CI meas= -0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2028,KPDmeas= 0.2072,KC= 0.1931
Ncalc = 1.45 - 1.46

Optical Data:

Biaxial (+), a=1.475, b=1.48, g=1.487, bire=0.0120, 2V(Calc)=82, 2V(Meas)=81.

Calculated Properties of Misenite

Electron Density:

Bulk Density (Electron Density)=2.36 gm/cc
note: Specific Gravity of Misenite =2.37 gm/cc.

Fermion Index:

Fermion Index = 0.0019539786
Boson Index = 0.9980460214

Photoelectric:

PE_Misenite= 4.51 barns/electron
U=PE_Misenite x r_electron= 10.66 barns/cc.

Radioactivity:

GRapi = 453.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Misenite per GRapi unit = 0.22 (%)

Estimated Radioactivity from Misenite - barely detectable

Misenite Classification

Dana Class:

28.01.02.01 (28)Anhydrous Acid and Sulfates

(28.01)(Anhydrous, Acid)

(28.01.02)Dana Group

28.01.02.01 Misenite K8H8(SO4)7(?) Mono

Strunz Class:

07.AD.15 07 - SULFATES (SELENATES, TELLURATES)

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

07.AD -With only large cations

07.AD.15 Misenite K8H8(SO4)7(?) Mono

Other Misenite Information

References:

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

See Also:

Links to other databases for Misenite :
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

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

Misenite

K8H8(SO4)7 (?)
Dana No: 28.01.02.01 Strunz No: 07.AD.15
Locality:

Notes:

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