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Bostwickite

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Taylor Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
© AVK

Formula:
CaMn
 
6
Si
 
3
O
 
16
·7H
 
2
O
System:OrthorhombicColour:Brownish red
Hardness:1
Name:
After Mr. Richard "Dick" Bostwick, prominent collector of, and authority on, fluorescent minerals, past President of the Franklin-Ogdensburg Mineralogical Society, board member of the Franklin Mineral Museum, former hard rock miner (Sterling Mine, NJ), and regional Vice President of the Fluorescent Mineral Society.


Brownish red Bronzey acicular crystals.

Classification of Bostwickite

IMA status:Approved 1983
Strunz 8th edition ID:8/D.05-10
Nickel-Strunz 10th (pending) edition ID:9.HC.10

9 : SILICATES (Germanates)
H : Unclassified silicates
C : With Mn, Fe
Dana 8th edition ID:78.7.1.1

78 : Unclassified Silicates
7 :
Hey's CIM Ref.:14.18.24

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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Type Occurrence of Bostwickite

Type Locality:Taylor Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1983
Geological Setting of type material:Deposited on fractures in silicate and oxide zinc ore
Associated Minerals at type locality:
CalciteFluoriteWillemiteFrankliniteKittatinnyite

Physical Properties of Bostwickite

Lustre:Sub-Vitreous, Greasy, Silky
Diaphaneity (Transparency):Translucent
Colour:Brownish red
Streak:White
Hardness (Mohs):1
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (measured):2.93 g/cm3

Crystallography of Bostwickite

Crystal System:Orthorhombic
Morphology:acicular in slightly divergent groups
X-Ray Powder Diffraction:
d-spacingIntensity
11.30 (100)
3.55 (30)
2.90 (30)
2.57 (40)
2.48 (20)
2.26 (20)
2.24 (20)
Comments:35-616

Optical Data of Bostwickite

Type:Biaxial (-)
RI values: nα = 1.775 nβ = 1.798 nγ = 1.800
2V:Measured: 25° , Calculated: 32°
Birefringence:0.025
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r < v strong

Chemical Properties of Bostwickite

Formula:
CaMn
 
6
Si
 
3
O
 
16
·7H
 
2
O
Essential elements:Ca, H, Mn, O, Si
All elements listed in formula:Ca, H, Mn, O, Si
Common Impurities:Al,Fe,As,Mg

Relationship of Bostwickite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HC.05Erlianite
(Fe,Mg)
 
4
(Fe,V)
 
2
Si
 
6
O
 
15
(OH,O)
 
8
Related Minerals - Hey's Index Grouping:

- +
14.18.1Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
14.18.2Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
14.18.3Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
·6H
 
2
O
14.18.4Norrishite
KLiMn
2+
2
[(OH)
 
2
|Si
 
4
O
 
10
]
14.18.5Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
·6H
 
2
O
14.18.6Abswurmbachite
CuMn
3+
6
O
 
8
(SiO
 
4
)
14.18.7Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
14.18.8Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
14.18.9Caryopilite
(Mn,Mg)
 
3
Si
 
2
O
 
5
(OH)
 
4
14.18.10Gonyerite
(Mn,Mg)
 
5
Fe(Si
 
3
Fe)O
 
10
(OH)
 
8
14.18.11 Tirodite
14.18.12Manganhumite
(Mn
2+
 
,Mg)
 
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
14.18.13Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
14.18.14Glaucochroite
CaMn
2+
 
[SiO
 
4
]
14.18.15Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
·2H
 
2
O
14.18.16Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH)·H
 
2
O
14.18.17Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
14.18.18Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
14.18.19Neltnerite
CaMn
3+
6
[O
 
8
|SiO
 
4
]
14.18.20Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
·2H
 
2
O
14.18.21Inesite
Ca
 
2
(Mn,Fe)
 
7
Si
 
10
O
 
28
(OH)
 
2
·5H
 
2
O
14.18.22Orientite
Ca
 
2
MnMn
 
2
Si
 
3
O
 
10
(OH)
 
4
14.18.23Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
14.18.25Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
·9H
 
2
O
14.18.26Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
14.18.27Sérandite
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
14.18.28Kvanefjeldite
Na
 
4
(Ca,Mn)(Si
 
3
O
 
7
)
 
2
(OH)
 
2
14.18.29Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
14.18.30Raite
Na
 
4
Mn
2+
3
Ti
 
0.25
Si
 
8
O
 
20
(OH)
 
2
·10H
 
2
O
14.18.31Richterite
Na[CaNa][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.18.32Byelorussite-(Ce)
Ba
 
2
NaCe
 
2
MnTi
 
2
Si
 
8
O
 
26
(F,OH) · H
 
2
O
14.18.33Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
Si
 
6
O
 
20
(OH)
 
5
14.18.34Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
14.18.35Pyroxmangite
MnSiO
 
3
14.18.36Dannemorite
14.18.37Neotocite
(Mn,Fe,Mg)SiO
 
3
·H
 
2
O
14.18.38Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
14.18.39Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
14.18.40Örebroite
Mn
2+
3
(Fe
3+
 
,Sb
5+
 
)[(O,OH)
 
3
|SiO
 
4
]

Other Names for Bostwickite

Synonyms:
IMA1982-073
Other Languages:
German:Bostwickit
Spanish:Bostwickita

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 Bostwickite

Reference List:Dunn, P.J. and Leavens, P.B. (1983) Bostwickite, a new calcium
manganese silicate hydrate from Franklin, New Jersey. Mineralogical Magazine: 47: 387-389.

American Mineralogist (1984)=: 69: 810 (abstract).

Internet Links for Bostwickite

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    Localities for Bostwickite

    (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.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn & Leavens(1983); Min. Mag.:47:387-389; Dunn(1995):Pt4:498.
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