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Emmonsite

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Moctezuma Mine (Bambolla Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico
© Christian Rewitzer

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Formula:
Fe
3+
2
[TeO
 
3
]
 
3
 · 2H
 
2
O
System:TriclinicColour:Yellowish-green; light ...
Lustre:VitreousHardness:5
Name:
For American economic geologist, Samuel Franklin Emmons (1841-1911), U.S. Geological Survey.
This page provides mineralogical data about Emmonsite.

Classification of Emmonsite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/K.09-30
Nickel-Strunz 10th (pending) edition ID:4.JM.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
M : Tellurites without additional anions, with H2O
Dana 8th edition ID:34.3.3.1

34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
Hey's CIM Ref.:28.3.21

28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
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Type Occurrence of Emmonsite

Type Locality:Tombstone, Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA
Year of Discovery:1885
Associated Minerals at type locality:
Cerussite

Occurrences of Emmonsite

Geological Setting:Oxidized zones of tellurium-bearing ore bodies.

Physical Properties of Emmonsite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Yellowish-green; light yellow-green in transmitted light.
Hardness (Mohs):5
Cleavage:Perfect
On {010}, perfect plus 2 unequal cleavages inclined relative to it, making plane angles of 85° and 95° in {010}.
Density (measured):4.52 - 4.55 g/cm3
Density (calculated):4.719 g/cm3

Crystallography of Emmonsite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.90(1) Å, b = 8.00(1) Å, c = 7.62(1) Å
α = 96.73°, β = 95°, γ = 84.47°
Ratio:a:b:c = 0.988 : 1 : 0.953
Unit Cell Volume:V 474.64 ų (Calculated from Unit Cell)
Z:2
Morphology:Radially-configured or lichen-like groups of rough, acicular crystals; druses of thin scales; compact microcrystalline masses. Fibrous crusts with a small botryoidal surface to isolated globular aggregates.
Twinning:Observed in microscopic crystals (Goldfield, Nevada).

Optical Data of Emmonsite

Type:Biaxial (-)
RI values: nα = 1.962 nβ = 2.090 nγ = 2.100 - 2.120
2V:Measured: 23° , Calculated: 28° to 48°
Maximum Birefringence:δ = 0.138 - 0.158

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

Chemical Properties of Emmonsite

Formula:
Fe
3+
2
[TeO
 
3
]
 
3
 · 2H
 
2
O
Essential elements:Fe, H, O, Te
All elements listed in formula:Fe, H, O, Te

Relationship of Emmonsite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JM.05Keystoneite
(Ni,Mg,Fe,Mn)
 
3
Te
 
3
O
 
9
·5H
 
2
O
4.JM.05Kinichilite
(Fe,Mg,Zn)
 
2
(TeO
 
3
)
 
3
(Na
 
x
H
 
2-x
)·3H
 
2
O
4.JM.05Zemannite
(H,Na)
 
2
(Zn,Fe)
 
2
(TeO
 
3
)
 
3
·nH
 
2
O
4.JM.10Blakeite
Fe
3+
2
[TeO
 
3
]
 
3
 (?)
4.JM.15Graemite
Cu[TeO
 
3
] · H
 
2
O
4.JM.20Teineite
Cu[TeO
 
3
] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
28.3.1Balyakinite
CuTeO
 
3
28.3.2Rajite
Cu[Te
4+
2
O
 
5
]
28.3.3Graemite
Cu[TeO
 
3
] · H
 
2
O
28.3.4Teineite
Cu[TeO
 
3
] · 2H
 
2
O
28.3.5Cesbronite
Cu
 
5
[(OH)
 
3
|TeO
 
3
]
 
2
 · 2H
 
2
O
28.3.6Mroseite
CaTeO
 
2
CO
 
3
28.3.7Quetzalcoatlite
Zn
 
6
Cu
 
3
(TeO
 
6
)
 
2
(OH)
 
6
·Ag
 
x
Pb
 
y
Cl
 
x+2y
28.3.8Zemannite
(H,Na)
 
2
(Zn,Fe)
 
2
(TeO
 
3
)
 
3
·nH
 
2
O
28.3.9Kinichilite
(Fe,Mg,Zn)
 
2
(TeO
 
3
)
 
3
(Na
 
x
H
 
2-x
)·3H
 
2
O
28.3.10Denningite
(Mn
2+
 
,Ca,Zn)[Te
4+
2
O
 
5
]
28.3.11Spiroffite
(Mn,Zn)
 
2
Te
 
3
O
 
8
28.3.12Winstanleyite
TiTe
 
3
O
 
8
28.3.13Fairbankite
PbTeO
 
3
28.3.14Plumbotellurite
PbTeO
 
3
28.3.15Choloalite
PbCu[TeO
 
3
]
 
2
 · H
 
2
O
28.3.16Smirnite
(BiO)
 
2
[TeO
 
3
]
28.3.17Chekhovichite
Bi
 
2
Te
 
4
O
 
11
28.3.18Cliffordite
UTe
 
3
O
 
9
28.3.19Schmitterite
(UO
 
2
)[TeO
 
3
]
28.3.20Moctezumite
PbUO
 
2
(TeO
 
3
)
 
2
28.3.22Blakeite
Fe
3+
2
[TeO
 
3
]
 
3
 (?)
28.3.23Mackayite
Fe
3+
 
[OH|Te
4+
2
O
 
5
]
28.3.24Poughite
Fe
3+
2
[SO
 
4
|(TeO
 
3
)
 
2
] · 3H
 
2
O
28.3.25Sonoraite
Fe
3+
 
[OH|TeO
 
3
] · H
 
2
O
28.3.26Rodalquilarite
H
 
3
Fe
 
2
(TeO
 
3
)
 
4
Cl
28.3.27Eztlite
Pb
 
2
Fe
3+
6
[(OH)
 
10
|(Te
4+
 
O
 
3
)
 
3
|Te
6+
 
O
 
6
] · 8H
 
2
O
28.3.28Keystoneite
(Ni,Mg,Fe,Mn)
 
3
Te
 
3
O
 
9
·5H
 
2
O

Other Names for Emmonsite

Synonyms:
DurdeniteEmmonsite (of Hillebrand)
Other Languages:
German:Emmonsit
Russian:Эммонсит
Spanish:Emmonsita

Other Information

Other Information:Readily soluble in strong acids.
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 Emmonsite

Reference List:Hillebrand, W.F. (1885), Emmonsite, a ferric tellurite, Proceedings Colorado Sci. Soc.: 2: 20-23.

Dana and Wells (1890) American Journal of Science: 40: 78 (as Durdenite).

Schaller in: Hillebrand (1904) American Journal of Science: 18: 433

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 71.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 208.

Frondel, C. & F.H. Pough (1944), Two new tellurites of iron: Mackayite and blakeite, with new data on emmonsite and durdenite, American Mineralogist: 29: 211-225.

Mineralogical Record: 3: 82-84.

Proceedings of the Colorado Scientific Society: 2: 20-23.

Proceedings of the Colorado Scientific Society: 2: 45-46.

Tschermaks Mineralogische und Petrographische Mitteilungen: 18: 3, 157-168.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 640-641.

Internet Links for Emmonsite

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  • Raman and XRD data at RRUFF project
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  • Emmonsite details from Handbook of Mineralogy (PDF)
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    Localities for Emmonsite

    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.
    Chile
     
    • Coquimbo Region
      • Elqui Province
        • El Indio deposit
    		Llaumet C./Henríquez F. (1976); "Faja de mineralización de oro, plata, cobre y arsenico en la Cordillera Andina de la III y IV región"; Primero Congreso Geológico Chileno, Vol. II.
          • Tambo Mine
    		[AmMin 85:1324]
    Honduras
     
    • Francisco Morazán Department
      • Distrito Central
        • Tegucigalpa
          • Ojojona
    		Dana and Wells (1890) American Journal of Science: 40: 78; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 641.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Shizuoka Prefecture
          • Shimoda City
            • Rendaiji
    		Matsubara, S. (2002) The Mineral Species of Japan, 5th edition (Kobutsu Joho)
    Mexico
     
    • Sonora
      • Mun. de Moctezuma
    Lapis 2001(1), 11-40
    Panczner(1987):108-336.
    Lapis 2001(1), 11-40
    Lapis 2001(1), 11-40
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 212, 389-390; Hillebrand, W.F. (1885), Emmonsite, a ferric tellurite, Proceedings Colorado Sci. Soc.: 2: 20-23; Williams, S.A. (1981b), Duhamelite, Cu4Pb2Bi(VO4)4(OH)3·8H2O, a new Arizona mineral, Min.Mag.: 44: 151-152; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 67.
            • Contention-Grand Central Mine group
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 232.
    www.azminerals.com
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 171; Williams, S.A. (1981a), Choloalite, CuPb(TeO3)2·H2O, a new mineral, Min.Mag.: 44: 55-57.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 356, 375.
    Hillebrand, W.F. (1885), Emmonsite, a ferric tellurite, Proceedings Colorado Sci. Soc.: 2: 20-23; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 641; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 232.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 212, 281; Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, AZ Geol. Soc. Digest: 3: 53-56.
    • Colorado
      • Teller Co.
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 641; O'Donoghue (1976) "Encyclopedia of Minerals & Gemstones", 286.
    Min Rec 36:2 pp143-185
    Min Rec 36:2 pp143-185
    Min Rec 36:2 pp143-185
    • Nevada
      • Esmeralda Co.
        • Diamondfield District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 641.
    NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    Rocks & Minerals, Nov. 1999
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Nye Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • New Mexico
      • Catron Co.
        • Wilcox District
          • Lone Pine Hill area
    		Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
      • Grant Co.
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 641; Mineralogical Record: 3(2): 82.
    Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Minerals of New Mexico 3rd ed.
    • South Dakota
      • Lawrence Co.
        • Ruby Basin District
    		SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
        • Trojan District
    		R&M 75:3 pp 156-169
    Mineral and/or Locality
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