Nakauriite Mineral Data

General Nakauriite Information

Chemical Formula:

(Mn,Ni,Cu)8(SO4)4(CO3)(OH)6•48(H2O)

Composition:

Molecular Weight = 1,870.41 gm

Manganese 11.75 % Mn 15.17 % MnO

Copper 3.40 % Cu 4.25 % CuO

Nickel 9.41 % Ni 11.98 % NiO

Hydrogen 5.50 % H 49.12 % H₂O

Carbon 0.64 % C 2.35 % CO₂

Sulfur 6.86 % S 17.12 % SO₃

Oxygen 62.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₄Ni₃Cu(SO₄)₄(CO₃)(OH)₆•48(H₂O)

Environment:

Veins cutting massive serpentinite.

IMA Status:

Approved IMA 1976

Locality:

Nakauri, Achi Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Nakauriite + Pronunciation

Nakauriite Image

Images:

Nakauriite

Comments: Blue crystals of nakauriite on green serpentinite.
Location: Lobming, Styria, Austria. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Nakauriite Crystallography

Axial Ratios:

a:b:c =1.2715:1:1.4141

Cell Dimensions:

a = 14.585, b = 11.47, c = 16.22, Z = 2; V = 2,713.44 Den(Calc)= 2.29

Crystal System:

Orthorhombic Space Group: Unk

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

By Intensity(I/I_o): 7.314(1), 3.652(0.2), 2.367(0.16),

Physical Properties of Nakauriite

Color:

Sky blue, Light blue.

Density:

2.39

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Optical Properties of Nakauriite

Gladstone-Dale:

CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2622,KPDmeas= 0.2512,KC= 0.2605
Ncalc = 1.6 - 1.62

Optical Data:

Biaxial (-), a=1.585, b=1.604, g=1.612, bire=0.0270, 2V(Calc)=64, 2V(Meas)=65.

Pleochroism (x):

colorless.

Pleochroism (y):

light greenish blue.

Pleochroism (z):

pale sky blue.

Calculated Properties of Nakauriite

Electron Density:

Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Nakauriite =2.29 gm/cc.

Fermion Index:

Fermion Index = 0.0019566479
Boson Index = 0.9980433521

Photoelectric:

PE_Nakauriite= 8.30 barns/electron
U=PE_Nakauriite x rElectron Density= 19.69 barns/cc.

Radioactivity:

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

Nakauriite Classification

Dana Class:

32.04.01.01 (32)Compound Sulfates

(32.04)(hydrous) with poly-anionic formula

(32.04.01)Dana Group

32.04.01.01 Nakauriite (Mn,Ni,Cu)8(SO4)4(CO3)(OH)6•48(H2O) Unk Ortho

Strunz Class:

07.DG.30 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3

07.DG.30 Nakauriite (Mn,Ni,Cu)8(SO4)4(CO3)(OH)6•48(H2O) Unk Ortho

Other Nakauriite Information

References:

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

See Also:

Links to other databases for Nakauriite :
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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Nakauriite

(Mn,Ni,Cu)8(SO4)4(CO3)(OH)6•48(H2O)
Dana No: 32.04.01.01 Strunz No: 07.DG.30
Locality:

Notes:

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