Numanoite Mineral Data

General Numanoite Information

Chemical Formula:

Ca4CuB4O6(OH)6(CO3)2

Composition:

Molecular Weight = 573.17 gm

Calcium 27.26 % Ca 38.14 % CaO

Magnesium 0.61 % Mg 1.02 % MgO

Zinc 0.41 % Zn 0.51 % ZnO

Copper 8.58 % Cu 9.66 % Cu₂O

Boron 7.49 % B 24.10 % B₂O₃

Hydrogen 1.09 % H 9.76 % H₂O

Carbon 4.31 % C 15.81 % CO₂

Oxygen 50.25 % O

______ ______

100.00 % 99.00 % = TOTAL OXIDE

Empirical Formula:

Ca_3.89Cu_0.77Mg_0.14Zn_0.03B_3.96O_5.61(OH)_6.2(CO₃)_2.05

Environment:

Occurs as 1 to 5 mm cores in crystals or veins of boracite in a skarn with cavities and veins in crystalline limestone. Cu-dominant analogue of borcarite.

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Fuka mine, Fuka, Bitchu-cho, Takahashi City, Okayama Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Tadayuki Numano (1931-2001), Emeritus Professor of Okayama University.

Synonym:

IMA2005-050

Numanoite Image

Images:

Numanoite Borcarite

Comments: Zoned borcarite (Bc) crystal with a core of green numanoite (Nm). CanMin 45:307.
Location: Fuka mine, 40 km west-northwest of Okayama City, western Japan. Scale: See Image.
© Canadian Mineralogist

Numanoite Crystallography

Axial Ratios:

a:b:c =2.1231:1:0.5308

Cell Dimensions:

a = 17.794, b = 8.381, c = 4.4494, Z = 2; beta = 102.42° V = 648.02 Den(Calc)= 2.94

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 7.57(1)(110 ), 2.671(0.84)(421 ), 2.727(0.68)(221 ),1.887(0.52)(041,440), 2.272(0.48)(331 ), 2.899(0.44)(600 ), 1.698(0.34)(640 ), 2.201(0.28)(601 ),

Physical Properties of Numanoite

Cleavage:

{???} Perfect, {???} Perfect

Color:

Colorless, Blue green.

Density:

2.96

Diaphaneity:

Transparent

Habit:

Inclusions - Generally found as inclusions in other minerals.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Numanoite

Gladstone-Dale:

CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2209,KPDmeas= 0.2194,KC= 0.2239
Ncalc = 1.66

Optical Data:

Biaxial (-), a=1.618, b=1.658, g=1.672, bire=0.0540

Calculated Properties of Numanoite

Electron Density:

Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Numanoite =2.94 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Numanoite= 7.35 barns/electron
U=PE_Numanoite x rElectron Density= 21.54 barns/cc.

Radioactivity:

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

Numanoite Classification

Dana Class:

27.01.03.02 (27)Compound Borates

(27.01)Dana Type

(27.01.03)Dana Group

27.01.03.01 Borcarite Ca4MgB4O6(OH)6(CO3)2 C 2/m 2/m

27.01.03.02 Numanoite! Ca4CuB4O6(OH)6(CO3)2 C 2/m 2/m

Strunz Class:

06.DA.40 06 - BORATES

06.D - Tetraborates

06.DA -Neso-tetraborates

06.DA.40 Borcarite Ca4MgB4O6(OH)6(CO3)2 C 2/m 2/m

06.DA.40 Numanoite! Ca4CuB4O6(OH)6(CO3)2 C 2/m 2/m

Other Numanoite Information

References:

NAME( AmMin, v92:1778) PHYS. PROP.(AmMin, v92:1778) OPTIC PROP.(AmMin, v92:1778)

See Also:

Links to other databases for Numanoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Numanoite

Ca4CuB4O6(OH)6(CO3)2
Dana No: 27.01.03.02 Strunz No: 06.DA.40
Locality:

Notes:

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