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Nagashimalite

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Big Photo

Mogurazawa mine, Kiryuu City, Gunma Prefecture, Kanto Region, Honshu Island, Japan
© 2008, JGW

Show Nagashimalite Photos (2)



Formula:
Ba
 
4
(V,Ti)
 
4
B
 
2
Si
 
8
O
 
27
(O,OH)
 
2
Cl
System:OrthorhombicColour:Greenish-black
Lustre:Vitreous, Sub-MetallicHardness:6
Name:For Otokichi Nagashima (1890-1969), pioneer Japanese amateur mineralogist
This page provides mineralogical data about Nagashimalite.

Classification of Nagashimalite

IMA status:Approved
Strunz 8th edition ID:8/E.08-40
Nickel-Strunz 10th (pending) edition ID:9.CE.20

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
Dana 8th edition ID:64.3.1.3

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
3 : Rings with Other Anions and Insular Silicate Groups: 4-membered rings with [Si2O7] dimers
Hey's CIM Ref.:17.5.36

17 : Silicates Containing other Anions
5 : Borosilicates
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Type Occurrence of Nagashimalite

Type Locality:Mogurazawa mine, Kiryuu City, Gunma Prefecture, Kanto Region, Honshu Island, Japan
Place of Conservation of Type Material:National Science Museum, Tokyo
Year of Discovery:1980

Physical Properties of Nagashimalite

Lustre:Vitreous, Sub-Metallic
Colour:Greenish-black
Streak:green
Hardness (Mohs):6
Hardness (Vickers):VHN100=606 - 681 kg/mm2
Cleavage:None Observed
Density (measured):4.08 g/cm3
Density (calculated):4.14 g/cm3

Crystallography of Nagashimalite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pmmn {P21/m 21/m 2/n}
Cell Parameters:a = 13.937Å, b = 12.122Å, c = 7.116Å
Ratio:a:b:c = 1.15 : 1 : 0.587
Unit Cell Volume:V 1,202.21 ų (Calculated from Unit Cell)
Z:2
Morphology:Tabular to elongated crystals, sub=parallel aggregates.

Optical Data of Nagashimalite

Type:Biaxial (+)
RI values: nα = 1.750 nβ = 1.753 nγ = 1.780
2V:Measured: 30° , Calculated: 38°
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v strong
Pleochroism:Strong
Comments:X= greenish-yellow
Y= green
Z= greenish-brown

Chemical Properties of Nagashimalite

Formula:
Ba
 
4
(V,Ti)
 
4
B
 
2
Si
 
8
O
 
27
(O,OH)
 
2
Cl
Essential elements:B, Ba, Cl, O, Si, V
All elements listed in formula:B, Ba, Cl, H, O, Si, Ti, V
Common Impurities:Mn,H2O

Relationship of Nagashimalite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CE.05Papagoite
CaCu[H
 
3
AlSi
 
2
O
 
9
]
9.CE.10Verplanckite
Ba
 
2
(Mn,Fe,Ti)Si
 
2
O
 
6
(O,OH,Cl,F)
 
2
 · 3H
 
2
O or near
9.CE.15Baotite
Ba
 
4
(Ti,Nb)
 
8
Si
 
4
O
 
28
Cl
9.CE.20Taramellite
Ba
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
9.CE.20Titantaramellite
Ba
 
4
(Ti,Fe
3+
 
,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
9.CE.25Bario-orthojoaquinite
(Ba,Sr)
 
4
Fe
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
 · H
 
2
O
9.CE.25Byelorussite-(Ce)
NaBa
 
2
Ce
 
2
MnTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(F,OH) · H
 
2
O
9.CE.25Joaquinite-(Ce)
NaBa
 
2
Ce
 
2
FeTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(OH,F) · H
 
2
O
9.CE.25Orthojoaquinite-(Ce)
NaBa
 
2
Ce
 
2
FeTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH) · H
 
2
O
9.CE.25Strontiojoaquinite
Sr
 
2
Ba
 
2
(Na,Fe)
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH)
 
2
 · H
 
2
O
9.CE.25Strontio-orthojoaquinite
(Na,Fe)
 
2
Sr
 
2
Ba
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH)
 
2
 · H
 
2
O
9.CE.25Orthojoaquinite-(La)
NaBa
 
2
La
 
2
Fe
2+
 
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH) · H
 
2
O
9.CE.30eLabuntsovite-Mn
Na
 
4
K
 
4
(Ba,K)
 
2
Mn
2+
 
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10-12H
 
2
O
9.CE.30aNenadkevichite
(Na,◻)
 
8
Nb
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 8H
 
2
O
9.CE.30dLemmleinite-K
K
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 4H
 
2
O
9.CE.30aKorobitsynite
Na
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3-4H
 
2
O
9.CE.30cKuzmenkoite-Mn
K
 
2
Mn
2+
 
(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
 · 5H
 
2
O
9.CE.30bVuoriyarvite-K
K
 
2
(Nb,Ti)
 
2
(Si
 
4
O
 
12
)(O,OH)
 
2
 · 4H
 
2
O
9.CE.30bTsepinite-Na
Na
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30cKarupmøllerite-Ca
(Na,Ca,K)
 
2
Ca(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30eLabuntsovite-Mg
Na
 
4
K
 
4
(Ba,K)
 
2
Mg(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10H
 
2
O
9.CE.30eLabuntsovite-Fe
Na
 
4
K
 
4
(Ba,K)
 
2
Fe
2+
 
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10H
 
2
O
9.CE.30dLemmleinite-Ba
Na
 
2
K
 
2
Ba(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5H
 
2
O
9.CE.30cGjerdingenite-Fe
K
 
2
Fe
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30hNeskevaaraite-Fe
K
 
3
Na
 
2
Fe
2+
 
(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5-6 H
 
2
O
9.CE.30bTsepinite-K
K
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30bParatsepinite-Ba
Ba
 
4
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(OH,O)
 
8
 · 8H
 
2
O
9.CE.30bTsepinite-Ca
Ca(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30hAlsakharovite-Zn
NaSrKZn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30cGjerdingenite-Mn
K
 
2
Mn
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30cLepkhenelmite-Zn
(Ba,K)
 
2
Zn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30bTsepinite-Sr
Sr(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30bParatsepinite-Na
(Na,Sr,K,Ca)
 
7
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
·nH
 
2
O n ~ 8
9.CE.30fParalabuntsovite-Mg
Na
 
8
K
 
8
Mg
 
8
Ti
 
16
(Si
 
4
O
 
12
)
 
8
(O,OH)
 
16
· nH
 
2
O
9.CE.30cGjerdingenite-Ca
K
 
2
Ca(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30cGjerdingenite-Na
K
 
2
Na
 
2
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
 · 5H
 
2
O
9.CE.30hGutkovaite-Mn
K
 
2
CaMn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5H
 
2
O
9.CE.30cKuzmenkoite-Zn
K
 
2
Zn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
·6-8H
 
2
O
9.CE.30gOrganovaite-Mn
K
 
2
Mn(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30gOrganovaite-Zn
K
 
2
Zn(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30gParakuzmenkoite-Fe
(K,Ba)
 
4
Fe(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 14H
 
2
O
9.CE.30cBurovaite-Ca
(Na,K)
 
4
Ca
 
2
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(OH,O)
 
8
 · 12H
 
2
O
9.CE.45Komarovite
(Ca,Mn)Nb
 
2
[O
 
3
|Si
 
2
O
 
7
] · 3.5H
 
2
O
9.CE.45Natrokomarovite
(Na,Ca,H)
 
2
Nb
 
2
Si
 
2
O
 
10
(OH,F)
 
2
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
17.5.1Manandonite
LiAl
 
4
(BSi
 
3
O
 
10
)(OH)
 
6
17.5.2Reedmergnerite
Na[BSi
 
3
O
 
8
]
17.5.3Searlesite
Na(H
 
2
BSi
 
2
O
 
7
)
17.5.4Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
17.5.5Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.6Kalborsite
K
 
6
Al
 
4
BSi
 
6
O
 
20
(OH)
 
4
Cl
17.5.7Boromuscovite
KAl
 
2
(BSi
 
3
O
 
10
)(OH)
 
2
17.5.8Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
17.5.9Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.10Datolite
Ca(HBSiO
 
5
)
17.5.11Danburite
CaB
 
2
Si
 
2
O
 
8
17.5.12Howlite
Ca
 
2
B
 
5
SiO
 
9
(OH)
 
5
17.5.13Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
17.5.14Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
 · 12.5H
 
2
O
17.5.15Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
17.5.16Harkerite
Ca
 
12
Mg
 
4
Al(BO
 
3
)
 
3
(SiO
 
4
)
 
4
(CO
 
3
)
 
5
 · H
 
2
O
17.5.17Serendibite
(Ca,Na)
 
2
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
3
[O
 
2
|(Si,Al,B)
 
6
O
 
18
]
17.5.18Stillwellite-(Ce)
(Ce,La,Ca)BSiO
 
5
17.5.19Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ce,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
](OH)
 
2
17.5.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
17.5.21Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
17.5.22Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
17.5.23Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
17.5.24Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
17.5.25Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
17.5.26Holtite
Al
 
6
(Al,Ta)(SiO
 
4
,SbO
 
4
,AsO
 
4
)
 
3
(BO
 
3
)O
 
3
17.5.27Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.28 Ferridravite
17.5.29Axinite-(Mg)
Ca
 
2
MgAl
 
2
BSi
 
4
O
 
15
OH
17.5.30Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.31Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
17.5.32Tienshanite
KNa
 
3
Na
 
6
Ca
 
2
Ba
 
6
Mn
 
6
(Ti
4+
 
,Nb)
 
6
B
 
12
Si
 
36
O
 
114
(O,OH,F)
 
11
17.5.33Leucosphenite
BaNa
 
4
Ti
 
2
B
 
2
Si
 
10
O
 
30
17.5.34Taramellite
Ba
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.35Titantaramellite
Ba
 
4
(Ti,Fe
3+
 
,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.37Chromdravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.38Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
17.5.39Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37
17.5.40Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
17.5.41Axinite
17.5.42Tinzenite
(Ca,Mn
2+
 
,Fe
2+
 
)
 
6
Al
 
4
(B
 
2
Si
 
8
O
 
30
)(OH)
 
2
17.5.44Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.45Buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
17.5.46Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.47Axinite-(Fe)
Ca
 
2
Fe
2+
 
Al
 
2
BSi
 
4
O
 
15
OH
17.5.48Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
17.5.49Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
17.5.50Hyalotekite
(Ba,Pb,Ca,K)
 
6
(B,Si,Al)
 
2
(Si,Be)
 
10
O
 
28
(F,Cl)
17.5.51Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4

Other Names for Nagashimalite

Synonyms:
IMA1977-045
Other Languages:
German:Nagashimalit
Russian:Нагасималит
Spanish:Nagashimalita

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 Nagashimalite

Reference List:

- +
American Mineralogist (1981): 66: 638.

Mineralogical Journal: 10: 131-142.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Nagashimalite

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    • Localities for Nagashimalite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (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
      • Kanto Region
        • Gunma Prefecture
          • Kiryuu City
    		Mineral.Journ.Japan (1980) 10, 122-130
      • Tohoku Region
        • Iwate Prefecture
          • Shimohei-gun
    		Satoshi Matsubara, et al (2008) JAKOKA: 2008 Annual Meeting of the Japan Association of Mineralogical Sciences, R4-02
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