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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 (10)
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.
This page provides mineralogical data about Gageite.

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
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(F,OH)]
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
Mg
 
5
Mn
 
12
As
 
2
Si
 
12
O
 
43
(OH)
 
6
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

German names:
Gageit
Spanish names:
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.

American Mineralogist (1957): 72: 382-391.

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.
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    (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"
    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]
        • 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
    USA
     
    • California
      • San Bernardino Co.
        • Wrightwood
    		Cannon Microprobe Services, Seattle, WA
      • Santa Clara Co.
        • San Antonio Valley
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Palache(1935): 111; Dunn(1995): Pt3: 460.
    Mineral and/or Locality
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