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About GageiteHide

Robert Burns Gage
Usually brownish purple, brown, pinkish brown, light pink, light brown, also colorless in small crystals
Vitreous, Sub-Vitreous
Specific Gravity:
3.46 - 3.584
Crystal System:
Named in 1910 by Alexander Hamilton Phillips in honor of Robert Burns Gage [November 20, 1875 Kaneville, Venango County, Pennsylvania, USA - February 28, 1946 Trenton, New Jersey, USA] chemist with the New Jersey Highway Department. Gage held "numerous patents" relating to highway construction and introduced using weights of cement, rather than volumes of cement, when making concrete roads. Gage analyzed the first specimens of gageite. Gage named chlorophoenicite and schallerite.
Isostructural with:
Two polytypes are known, gageite-1A and gageite-2M, and are often present in the same "crystal".

Classification of GageiteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12

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

Physical Properties of GageiteHide

Vitreous, Sub-Vitreous
Transparent, Translucent
Usually brownish purple, brown, pinkish brown, light pink, light brown, also colorless in small crystals
On {110}
3.46 - 3.584 g/cm3 (Measured)    3.599 g/cm3 (Calculated)

Optical Data of GageiteHide

Biaxial (-)
RI values:
nα = 1.723 nβ = 1.734 nγ = 1.736
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v

Chemical Properties of GageiteHide

IMA Formula:

Crystallography of GageiteHide

Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Unit Cell Volume (calc):


Crystal StructureHide

Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000192GageiteMoore P B (1969) A novel octahedral framework structure: gageite American Mineralogist 54 1005-101719690293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
9.712 Å(12)
6.895 Å(31)
6.840 Å(32)
6.128 Å(39)
4.357 Å(13)
4.329 Å(11)
3.815 Å(3)
3.448 Å(19)
3.420 Å(100)
3.343 Å(8)
3.319 Å(24)
3.237 Å(48
3.190 Å(16)
3.107 Å(11)
3.064 Å(36)
2.894 Å(5)
2.744 Å(39)
2.717 Å(39)
2.704 Å(52)
2.662 Å(61)
2.614 Å(93)
2.558 Å(14)
2.543 Å(9)
2.487 Å(9)
2.360 Å(2)
2.351 Å(3)
2.341 Å(3)
2.333 Å(5)
2.304 Å(18)
2.298 Å(23)
2.267 Å(5)
2.239 Å(9)
2.165 Å(7)
2.143 Å(11)
2.107 Å(11)
2.101 Å(12)
2.086 Å(18)
2.077 Å(1)
2.052 Å(2)
2.017 Å(11)
2.010 Å(8)
1.9499 Å(3)
1.9424 Å(5)
1.9154 Å(4)
1.9076 Å(5)
1.9017 Å(3)
1.8802 Å(7)
1.8645 Å(4)
1.549 Å(10)
1.8065 Å(2)
1.7961 Å(8)
1.7573 Å(2)
1.7238 Å(2)
1.7102 Å(3)
1.7071 Å(2)
1.6887 Å(4)
1.6787 Å(10)
1.6760 Å(10)
1.6712 Å(13)
1.6664 Å(32)
ICDD 25-1201 On Franklin, NJ, material.

Type Occurrence of GageiteHide

Place of Conservation of Type Material:
National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA (R6444, 86845).
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:

Synonyms of GageiteHide

Other Language Names for GageiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
13 photos of Gageite associated with RhodochrositeMnCO3
7 photos of Gageite associated with ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O
6 photos of Gageite associated with ZinciteZnO
4 photos of Gageite associated with MagnetiteFe2+Fe3+2O4
4 photos of Gageite associated with WillemiteZn2SiO4
4 photos of Gageite associated with HematiteFe2O3
4 photos of Gageite associated with OyeliteCa10Si8B2O29 · 12.5H2O
2 photos of Gageite associated with HausmanniteMn2+Mn3+2O4
2 photos of Gageite associated with CalciteCaCO3
1 photo of Gageite associated with BrauniteMn2+Mn3+6(SiO4)O8

Related Minerals - Nickel-Strunz GroupingHide

9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon.
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon.
9.DH.40AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 1 : P1
9.DH.40HøgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40Makarochkinite(Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40RhöniteCa4[Mg8Fe3+2Ti2]O4[Si6Al6O36]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.7.2KrauskopfiteBaSi2O5 · 3H2OMon.
14.7.4MacdonalditeBaCa4Si16O36(OH)2 · 10H2OOrth.
14.7.5EricssoniteBaMn2+2Fe3+(Si2O7)O(OH)Mon. 2/m : B2/m
14.7.11WillemiteZn2SiO4Trig. 3 : R3
14.7.12HemimorphiteZn4Si2O7(OH)2 · H2OOrth. mm2 : Imm2
14.7.13ZincsiliteZn3Si4O10(OH)2 · 4H2O (?)Mon.
14.7.14HardystoniteCa2Zn(Si2O7)Tet. 4 2m : P4 21m
14.7.16ClinohedriteCaZn(SiO4) · H2OMon. m : Bb
14.7.17JunitoiteCaZn2Si2O7 · H2OOrth. mm2
14.7.18LarsenitePbZnSiO4Orth. mm2 : Pna21
14.7.19EsperitePbCa2Zn3(SiO4)3Mon. 2/m : P21/b
14.7.23FranklinfurnaceiteCa2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8Mon. 2 : B2

Fluorescence of GageiteHide

Not fluorescent in UV

Other InformationHide

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

References for GageiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Trenton Evening Times, March 1, 1946, Obituary, p. 22.
Moore, Paul Brian (1968) Relations of the manganese-calcium silicates, gageite and harstigite. American Mineralogist: 53: 309-315.
Moore, Paul Brian (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 GageiteHide

Localities for GageiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Liguria
    • La Spezia Province
      • Rocchetta di Vara
Balestra C. (2012): Sistematica ligure 2012. Prie. Notiziario di Mineralogia Ligure. 8-2 60-69
  • Kochi Prefecture
    • Nankoku city
Journal of Mineralogical and Petrological Sciences 103,400-406(2008)
  • Mie Prefecture
    • Watarai District
      • Watarai town
Masutomi Museum specimen (Kyoto); 加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
  • 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" (abs.); Nishikubo, K., Yamada, T., Harada, A., Takizawa, M., Tange, K., Kosuge, Y., Miyawaki, R., Matsubara, S. (2009): Rambergite from the Hirogawara mine, Urayama, Chichibu City, Saitama Prefecture, Japan. Bulletin of the National Museum of Nature and Science Series C (Geology & Paleontology), 35, 7-10.
  • Tokushima Prefecture
Fukuoka & Hirowatari (1988) Kouzan Chishitsu, 38, 441-447.; Fukuoka, M., & Hirowatari, F. (1988). Gageite, one of main constituent minerals of" chocolate ore" in the bedded manganese deposits in Japan. Mining Geology, 38(211), 441-447.
  • Komi Republic
South Africa
  • Northern Cape
    • Kalahari manganese field
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
      • Kuruman
        • N'Chwaning Mines
Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden, RSA; Cairncross, B., and Beukes, N. J., (2013) The Kalahari Manganese Field, the adventure continues. Struik Nature Publishers, Cape Town, South Africa
Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden 2014, RSA;
South Korea
  • Gangwon Province
    • Chongson-gun
      • Nam-myon (Sindong-myon)
Kinosaki, Y. (1943) Jour. Min. Soc. Korea, 26, 8.
  • Värmland County
    • Filipstad
      • Persberg ore district
        • Pajsberg
Nysten, P. (2004): Harstigen ett mineralogisk eldorado i Bergslagen. Norsk Bergverksmuseum Skrift 28: 5-13
  • California
    • San Bernardino Co.
      • San Gabriel Mountains
        • Wrightwood
Cannon Microprobe Services, Seattle, WA
    • Santa Clara Co.
      • Black Wonder Mining District
        • Sugarloaf Mountain
Pete J. Dunn, Donald R. Peacor, Richard C. Erd, and Robert A. Ramik (1986) Franciscanite and örebroite, two new minerals from California and Sweden, related to redefined welinite. American Mineralogist, 71:1522-1526.
    • Stanislaus Co.
      • Ladd-Buckeye Mining District
        • Mount Oso
Econ Geol (1992) 87:2023-2040; Huebner, J. Stephen; Flohr, Marta J. (1990) Microbanded manganese formations; protoliths in the Franciscan Complex, California; USGS Professional Paper 1502.
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Franklin
Palache(1935): 111; Dunn(1995): Pt3: 460.
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