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Emmonsite

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Samuel Franklin Emmons
Formula:
Fe23+[TeO3]3 · 2H2O
System:
Triclinic
Colour:
Yellowish-green; light ...
Lustre:
Vitreous
Hardness:
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

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
34.3.3.1

34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
28.3.21

28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
mindat.org URL:
http://www.mindat.org/min-1377.html
Please feel free to link to this page.

Type Occurrence of Emmonsite

Year of Discovery:
1885
Associated Minerals at Type Locality:

Occurrences of Emmonsite

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

Physical Properties of Emmonsite

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:
4.52 - 4.55 g/cm3 (Measured)    4.719 g/cm3 (Calculated)

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
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°
Max Birefringence:
δ = 0.138 - 0.158
Image 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:
Fe23+[TeO3]3 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Emmonsite to other Species

4.JM.05Keystoneite(Ni,Mg,Fe,Mn)3Te3O9 · 5H2O
4.JM.05Kinichilite(Fe,Mg,Zn)2(TeO3)3(NaxH2-x) · 3H2O
4.JM.05ZemanniteMg(ZnFe)2(TeO3)6·9H2O
4.JM.10BlakeiteFe23+[TeO3]3 (?)
4.JM.15GraemiteCu[TeO3] · H2O
4.JM.20TeineiteCu[TeO3] · 2H2O
28.3.1BalyakiniteCu(TeO3)
28.3.2RajiteCu(Te24+O5)
28.3.3GraemiteCu[TeO3] · H2O
28.3.4TeineiteCu[TeO3] · 2H2O
28.3.5CesbroniteCu5(TeO3)2(OH)6 · 2H2O
28.3.6MroseiteCaTe4+(CO3)O2
28.3.7QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2y
28.3.8ZemanniteMg(ZnFe)2(TeO3)6·9H2O
28.3.9Kinichilite(Fe,Mg,Zn)2(TeO3)3(NaxH2-x) · 3H2O
28.3.10Denningite(Mn2+,Ca,Zn)Te24+O5
28.3.11Spiroffite(Mn,Zn)2Te34+O8
28.3.12WinstanleyiteTiTe34+O8
28.3.13FairbankitePb(TeO3)
28.3.14PlumbotelluritePb(TeO3)
28.3.15Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6Cl
28.3.16SmirniteBi2Te4+O5
28.3.17ChekhovichiteBi2Te44+O11
28.3.18Cliffordite(UO2)Te34+O7
28.3.19Schmitterite(UO2)(TeO3)
28.3.20MoctezumitePb(UO2)(TeO3)2
28.3.22BlakeiteFe23+[TeO3]3 (?)
28.3.23MackayiteFe3+(Te24+O5)(OH)
28.3.24PoughiteFe23+(TeO3)2(SO4)(H2O)2 · H2O
28.3.25SonoraiteFe3+(TeO3)(OH) · H2O
28.3.26RodalquilariteFe2(TeO2OH)3(TeO3)Cl
28.3.27EztlitePb2Fe63+(Te4+O3)3(Te6+O6)(OH)10 · 8H2O
28.3.28Keystoneite(Ni,Mg,Fe,Mn)3Te3O9 · 5H2O

Other Names for Emmonsite

Name in Other Languages:
German:Emmonsit
Spanish:Emmonsita

Other Information

Other Information:
Readily soluble in strong acids.
Health Risks:
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

Localities for Emmonsite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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]; http://www.lrz-muenchen.de/~mineralogische-sammlungen-dmg/analysen/winstanleyit.htm; Back, M.E., Grice, J.D., Gault, R.A., Criddle, A.J. & Mandarino, J.A. (1999): Walfordite, a new tellurite from the Wendy open pit, El Indio - Tambo mining property, Chile. Canadian Mineralogist 37, 1261-1268.
China
 
  • Hebei Province
    • Zhangjiakou Prefecture
      • Chongli Co.
Jiuling Li, Makovicky, E., Rose Hansen, J., Petersen, S.B., Feng Qi, Yanhe Cui, and Qingsheng Xu (2001): Geoscience 15(2), 189-196
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); Dr. Yohachiro Okamoto collection (conserved by the Geological Survey of Japan)
Mexico
 
  • Sonora
    • Mun. de Moctezuma
Lapis 2001(1), 11-40
Panczner(1987):108-336.
Lapis 2001(1), 11-40
Lapis 2001(1), 11-40
Spain
 
  • Andalusia
    • Almería
      • Níjar
        • Rodalquilar
Sierra, J., Leal, G., Pierrot, R., Laurent, Y., Protas, J. y Dusausoy,Y. (1968). La rodalquilarite, chlorotelurite de fer, une nouvelle espece minerale. Bulletin de la Societe Francaise de Mineralogie et Cristalographie, 91, 28-33.
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.
          • Silver Plume Mine (Emerald & Silver Plume Mine group)
Robert PECORINI collection
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.
  • California
Larsen, Esper Signius (1917), Durdenite from California: American Mineralogist: 2: 45-46; Larsen, Esper Signius (1921), The microscopic determination of nonopaque minerals: USGS Bulletin 679, 294 pp.: 71; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 174; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 303.
  • 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; USGS Professional Paper 54
  • 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.
        • Goldfield
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.
      • Halfpint Range
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
  • Utah
    • Juab Co.
      • East Tintic Mts
        • Tintic District
          • Mammoth
Collected and analyzed by John Dagenais
    • Utah Co.
      • East Tintic Mts
        • East Tintic District
XRD analzyed by Dr. Rob Bowell.
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