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Gageite

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Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
© JBS 2006

Show Gageite Photos (11)
Formula:
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
System:MonoclinicColour:Colourless, light pink, ...
Hardness:3
Name:After Robert B. Gage, of Trenton, New Jersey, USA, analyst of the first specimens.


Two polytypes are known, gageite-1A and gageite-2M.

Classification of Gageite

IMA status:Approved
Strunz 8th edition ID:8/F.24-20
Nickel-Strunz 10th (pending) edition ID:9.DH.35

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
Hey's CIM Ref.:14.7.22

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
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Type Occurrence of Gageite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Place of Conservation of Type Material:National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA (R6444, 86845).
Year of Discovery:1910
Geological Setting of type material:In veins and solution cavities traversing massive ore in a metamorphosed stratiform Precambrian Zn-Fe-Mn orebody.
Associated Minerals at type locality:
ZinciteWillemiteSclaritePyrochroiteLeucophoenicite
ChlorophoeniciteCalcite

Physical Properties of Gageite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, light pink, light brown
Hardness (Mohs):3
Cleavage:Distinct/Good
On {110}
Density (measured):3.46 - 3.584 g/cm3
Density (calculated):3.599 g/cm3

Crystallography of Gageite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 19.42Å, b = 19.42Å, c = 9.84Å
β = 89.5°
Ratio:a:b:c = 1 : 1 : 0.507
Unit Cell Volume:V 3,710.88 ų (Calculated from Unit Cell)
Z:1
Morphology:Crystal system either monoclinic or triclinic. Triclinic values: Space Group P1¯; a: 14.17, b: 14.07, c: 9.84; α: 76.5°, β: 76.6°, γ: 86.9°.

Crystals are small, lath-like or saddle-like, grouped radially, in bundles, or as mats of fibers.
X-Ray Powder Diffraction:
d-spacingIntensity
6.87 (100)
2.758 (80)
2.707 (80)
3.44 (60)
3.25 (60)
2.556 (60)
Comments:On Franklin, NJ, material.

Optical Data of Gageite

Type:Biaxial (-)
RI values: nα = 1.723 nβ = 1.734 nγ = 1.736
Maximum Birefringence:δ = 0.013

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

Chemical Properties of Gageite

Formula:
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
Essential elements:H, Mn, O, Si
All elements listed in formula:H, Mn, O, Si

Relationship of Gageite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DH.05Leucophanite
NaCaBeSi
 
2
O
 
6
F
9.DH.10Ohmilite
Sr
 
3
(Ti,Fe
3+
 
)[(O,OH)|(Si
 
2
O
 
6
)
 
2
] · 2-3H
 
2
O
9.DH.15Haradaite
SrVSi
 
2
O
 
7
9.DH.15Suzukiite
BaVSi
 
2
O
 
7
9.DH.20Batisite
Na
 
2
BaTi
 
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.20Shcherbakovite
Na(K,Ba)
 
2
(Ti,Nb)
 
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.25Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
9.DH.30Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
9.DH.35Balangeroite
(Mg,Fe,Fe,Mn)
 
42
Si
 
16
O
 
54
(OH)
 
40
9.DH.40Aenigmatite
Na
 
2
Fe
2+
5
TiO
 
2
(Si
 
6
O
 
18
)
9.DH.40Dorrite
Ca
 
2
(Mg,Fe
2+
 
)
 
2
Fe
3+
4
[O
 
2
|Al
 
4
Si
 
2
O
 
18
]
9.DH.40Høgtuvaite
(Ca,Na)
 
2
(Fe
2+
 
,Fe
3+
 
,Ti)
 
6
[O
 
2
|Be(Si,Al)
 
5
O
 
18
]
9.DH.40Krinovite
Na
 
2
Mg
 
4
Cr
3+
2
[O
 
2
|Si
 
6
O
 
18
]
9.DH.40Makarochkinite
Ca
 
2
Fe
2+
4
Fe
3+
 
Ti[O
 
2
|BeAlSi
 
4
O
 
18
]
9.DH.40Rhönite
Ca
 
2
(Mg,Fe
2+
 
,Fe
3+
 
,Ti)
 
6
[O
 
2
|(Si,Al)
 
6
O
 
18
]
9.DH.40Serendibite
(Ca,Na)
 
2
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
3
[O
 
2
|(Si,Al,B)
 
6
O
 
18
]
9.DH.40Welshite
Ca
 
4
Mg
 
9
Sb
 
3
O
 
4
[Si
 
6
Be
 
3
AlFe
 
2
O
 
36
]
9.DH.40Wilkinsonite
Na
 
2
Fe
2+
4
Fe
3+
2
[O
 
2
|Si
 
6
O
 
18
]
9.DH.45Sapphirine
(Mg,Fe)
 
4-x
Al
 
4+x
[Al
 
4+x
Si
 
2-x
O
 
18
]O
 
2
9.DH.50Khmaralite
(Mg,Al,Fe)
 
16
[(Al,Si,Be)
 
12
O
 
36
]O
 
4
9.DH.55Surinamite
(Mg,Fe)
 
3
Al
 
4
BeSi
 
3
O
 
16
9.DH.60Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
Si
 
6
O
 
20
(OH)
 
5
9.DH.65Howieite
Na(Fe,Mn)
 
10
(Fe,Al)
 
2
Si
 
12
O
 
31
(OH)
 
13
9.DH.65Taneyamalite
(Na,Ca)(Mn,Mg,Fe)
 
12
Si
 
12
(O,OH)
 
44
9.DH.70Johninnesite
Na
 
2
Mn
2+
9
Mg
 
7
(OH)
 
8
[AsO
 
4
]
 
2
[Si
 
6
O
 
17
]
 
2
9.DH.75Agrellite
NaCa
 
2
[F|Si
 
4
O
 
10
]
Related Minerals - Hey's Index Grouping:

- +
14.7.1Sanbornite
Ba
 
2
[Si
 
4
O
 
10
]
14.7.2Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
14.7.3Walstromite
BaCa
 
2
[Si
 
3
O
 
9
]
14.7.4Macdonaldite
BaCa
 
4
Si
 
16
O
 
36
(OH)
 
2
·10H
 
2
O
14.7.5Ericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.6Orthoericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.7Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
14.7.8Andrémeyerite
BaFe
2+
2
[Si
 
2
O
 
7
]
14.7.9Pellyite
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
14.7.10Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
14.7.11Willemite
Zn
 
2
[SiO
 
4
]
14.7.12Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
14.7.13Zincsilite
Zn
 
3
Si
 
4
O
 
10
(OH)
 
2
·4H
 
2
O
14.7.14Hardystonite
Ca
 
2
Zn[Si
 
2
O
 
7
]
14.7.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.7.16Clinohedrite
CaZn[SiO
 
4
] · H
 
2
O
14.7.17Junitoite
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
14.7.18Larsenite
PbZn[SiO
 
4
]
14.7.19Esperite
PbCa
 
3
Zn
 
4
[SiO
 
4
]
 
4
14.7.20Hodgkinsonite
Mn
2+
 
Zn
 
2
[(OH)
 
2
|SiO
 
4
]
14.7.21Gerstmannite
(Mg,Mn
2+
 
)Zn[(OH)
 
2
|SiO
 
4
]
14.7.23Franklinfurnaceite
Ca
 
2
FeMn
 
3
MnZn
 
2
Si
 
2
O
 
10
(OH)
 
8

Other Names for Gageite

Other Languages:
German:Gageit
Spanish:Gageita

Polytypes for Gageite

Polytypes:
Gageite-1AGageite-2M

Other Information

Fluorescence in UV light:None.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:None.

References for Gageite

Reference List:Phillips, A.H. (1910) Gageite, a new mineral from Franklin, New Jersey. American Journal of Science: 30: 283-284.

Palache, C. (1935) The Minerals of Franklin and Sterling Hill, Sussex County, New Jersey. USGS Professional Paper 180: 111.

Moore, P.B. (1968) Relations of the manganese-calcium silicates, gageite and harstigite. American Mineralogist: 53: 309-315.

Moore, P.B. (1969) A novel octahedral framework structure: gageite. American Mineralogist: 54: 1005-1017.

Dunn, P.J. (1979) The chemical composition of gageite: an empirical formula. American Mineralogist: 64: 1056-1058.

Ferraris, G., Mellini, M., and Merlino, S. (1987) Electron-diffraction and electron microscopy study of balangeroite and gageite: crystal structures, polytypism, and fiber texture. American Mineralogist: 72: 382-391.

Dunn, Pete J. (1995): Franklin and Sterling Hill New Jersey: the world’s most magnificent mineral deposits, part 3: 460.

Internet Links for Gageite

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    Localities for Gageite

    Hide Locality List
    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.
    (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
        • Saitama Prefecture
          • Chichibu City
            • Urayama
    		K. Nishikubo, T. Yamada, A. Harada, M. Takizawa, K. Tange, Y. Kosuge, R. Miyawaki, and S. Matsubara (2005) "Rambergite from the Hirogawara mine, Urayama, Chichibu City, Saitama Prefecture, Japan"
      • Kinki region
        • Mie Prefecture
    		Masutomi Museum specimen (Kyoto)
    • Shikoku Island
      • Kochi Prefecture
        • Outoyo (Ohtoyo)
    		Journal of Mineralogical and Petrological Sciences 103,400-406(2008)
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		[Von Bezing, K. L. et al. (1991) - The Kalahari manganese field : an update, Mineralogical Record, 22 (3), 279-302]
        • Kuruman
          • N'Chwaning Mines
    		[var: Gageite-2M] www.excaliburmineral.com
    Minerals of South Africa
    South Korea
     
    • Gangwon-do (Kangwon-do)
      • Chongson-gun
        • Nam-myon (Sindong-myon)
    		Kinosaki, Y. (1943) Jour. Min. Soc. Korea, 26, 8.
    Sweden
     
    • Värmland
      • Filipstad
        • Pajsberg
    		Kjell Gatedal; Nysten, P. (2004): Harstigen ett mineralogisk eldorado i Bergslagen. Norsk Bergverksmuseum Skrift 28: 5-13
    USA
     
    • California
      • San Bernardino Co.
        • Wrightwood
    		Cannon Microprobe Services, Seattle, WA
      • Santa Clara Co.
        • San Antonio Valley
      • Stanislaus Co.
    		Econ Geol (1992) 87:2023-2040
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Palache(1935): 111; Dunn(1995): Pt3: 460.
    Mineral and/or Locality
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