Nakauriite Mineral Data

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.

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:

OrthorhombicSpace 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

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:

r_electron=2.37 gm/cc
note: r_Nakauriite=2.29 gm/cc.

Fermion Index

Fermion Index = 0.00195
Boson Index = 0.99805

Photoelectric:

PE_Nakauriite= 8.30 barns/electron
U=PE_Nakauriite x r_electron= 19.69 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nakauriite is Not Radioactive

Nakauriite Classification

Dana Class:

32.4.1.1 (32)Compound Sulfates

(32.4)(hydrous) with poly-anionic formula

(32.4.1)Dana Group

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

Strunz Class:

VI/D.03-90 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.03 - Langite series, Posnjakite - Nakuriite

VI/D.03-10 Posnjakite Cu4(SO4)(OH)6·(H2O) C 2/c 2/m

VI/D.03-20 Langite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-30 Wroewolfeite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-40 Namuwite (Zn,Cu)4(SO4)(OH)6·4(H2O) Unk Hex

VI/D.03-50 Guarinoite (Zn,Co,Ni)6(SO4)(OH,Cl)10·5(H2O) P 6₃/m,P 6₃, or P 6₃22 Hex

VI/D.03-55 Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10·8(H2O) P 6₃ 6

VI/D.03-60 Schulenbergite (Cu,Zn)7(SO4,CO3)2(OH)10·3(H2O) P 3 or P 3- Trig

VI/D.03-65 Christelite! Zn3Cu2(SO4)2(OH)6·4(H2O) P1 1

VI/D.03-70 Ktenasite (Cu,Zn)5(SO4)2(OH)6·6(H2O) P 2₁/c 2/m

VI/D.03-75 Ramsbeckite (Cu,Zn)15(SO4)4(OH)22·6(H2O) P 2₁/a 2/m

VI/D.03-80 Campigliaite Cu4Mn(SO4)2(OH)6·4(H2O) C 2 2

VI/D.03-90 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Nakauriite

(Mn,Ni,Cu)8(SO4)4(CO3)(OH)6·48(H2O)
Dana No: 32.4.1.1 Strunz No: VI/D.03-90
Locality:

Notes: