Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (10 online) Mindat Auctions

Numanoite

Big Photo

Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
© J.Ralph

Show Numanoite Photos (2)
Formula:
Ca
 
4
Cu[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]
System:MonoclinicColour:bluish green
Hardness:4½
Name:Named for Dr. Tadayuki Numano (1931-2001) of Okayama University.


Cu dominant analogue of Borcarite, with which it forms a partial series.

Classification of Numanoite

IMA status:Approved 2005
Strunz 8th edition ID:5/H.13-20
Nickel-Strunz 10th (pending) edition ID:6.DA.40

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
mindat.org URL:http://www.mindat.org/min-29100.html
Please feel free to link to this page.

Type Occurrence of Numanoite

Type Locality:Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
General Appearance of Type Material:Bluish green central zone in colorless borcarite crystals.
Place of Conservation of Type Material:National Science Museum (Japan), specimen # M28813.
Geological Setting of type material:Borate-bearing low-Fe calc-silicate skarn.
Associated Minerals at type locality:
NifontoviteCalciteBultfonteiniteBorcarite

Physical Properties of Numanoite

Lustre:Vitreous
Diaphaneity (Transparency):Semitransparent
Colour:bluish green
Comment:Varies from quite intense to very pale, almost colorless, partly depending on thickness of the numanoite zone.
Hardness (Mohs):4½
Hardness (Vickers):VHN25=290 - 464 kg/mm2
Hardness Data:Measured
Cleavage:Perfect
{100} {110}
Density (measured):2.96 g/cm3
Density (calculated):2.96 g/cm3

Crystallography of Numanoite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m (B1 1 2/m) [C2/m] {C1 2/m 1}
Cell Parameters:a = 17.794Å, b = 8.381Å, c = 4.4494Å
β = 102.42°
Ratio:a:b:c = 2.123 : 1 : 0.531
Unit Cell Volume:V 648.02 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
7.57 (100)
2.671 (84)
2.727 (68)
1.887 (52)
2.272 (48)
2.899 (44)
1.698 (34)
Comments:resembles borcarite pattern

Chemical Properties of Numanoite

Formula:
Ca
 
4
Cu[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]
Essential elements:
All elements listed in formula:B, C, Ca, Cu, H, O
Empirical Formula:
Ca
 
4
Cu[B
 
4
O
 
6
(OH)
 
6
(CO
 
3
)
 
2
]

Relationship of Numanoite to other Species

Related Minerals - Nickel-Strunz Grouping):
6.DA.10Borax
Na
 
2
[B
 
4
O
 
7
] · 10H
 
2
O
6.DA.15Tincalconite
Na
 
2
[B
 
4
O
 
7
] · 5H
 
2
O
6.DA.20Hungchaoite
Mg[B
 
4
O
 
7
] · 9H
 
2
O
6.DA.25Fedorovskite
Ca
 
2
(Mg,Mn
2+
 
)
 
2
[(OH)
 
6
|B
 
4
O
 
7
]
6.DA.25Roweite
Ca
 
2
Mn
2+
2
[(OH)
 
6
|B
 
4
O
 
7
]
6.DA.30Hydrochlorborite
Ca
 
4
B
 
8
O
 
15
Cl
 
2
·21H
 
2
O
6.DA.35Uralborite
Ca[B
 
2
O
 
2
(OH)
 
4
]
6.DA.40Borcarite
Ca
 
4
Mg[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]

Other Names for Numanoite

Synonyms:
IMA2005-050
Japanese names:
沼野石

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Numanoite

Reference List:Ohnishi, M. et al. (2005) Kobutsu-Gakkai Koen-Yoshi (Abstract of the Meeting of the Mineralogical Society of Japan), 138.

Onishi, M. et al. (2006): Numanoite, Ca4CuB4O6(OH)6(CO3)2, a new mineral, the Cu-analogue of borcarite from the Fuka mine, Okayama Prefecture, Japan. International Mineralogical Association 19th General Meeting, Kobe, Japan, July 23-28, 2006; Conference Abstract Volume, abstract # 90144.

Masayuki Ohnishi, et al.: Numanoite, Ca4CuB4O6(OH)6(CO3)2, a new mineral species, the Cu-dominant analogue of borcarite from the Fuka mine, Okayama Prefecture, Japan", Canadian Mineralogist (in press).

Internet Links for Numanoite

Search Engines:
  • Look for Numanoite on Google
  • Look for Numanoite images on Google
    • External Links:
  • Look for Numanoite on Webmineral
  • Look for Numanoite on Athena Mineralogy
  • Look for Numanoite on Wikipedia
  • Look for Numanoite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Numanoite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Fine Minerals from Dan Weinrich Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • e-Rocks - Mineral Auctions and Sales
  • Search for Numanoite on minvision.com
  • Buy from David K Joyce minerals
  • Buy Fine Minerals from mineralsweb.com
  • Top quality minerals from Kristalle of California
  • Wilensky Fine Minerals
  • Wendel Minerals - Auktion & Shop
  • Buy Minerals and Crystals from Crystalarium.com
  • High-end worldwide specimens & outstanding customer service
  • Find Numanoite on www.crystalclassics.co.uk
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Numanoite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    		Ohnishi, et al. (2005) Kobutsu-Gakkai Koen-Yoshi (Abstract of the Meeting of the Mineralogical Society of Japan), 138.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.