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Terlinguaite

This page kindly sponsored by Guy Story Brown
Formula:
(Hg22+)Hg22+Cl2O2
System:
Monoclinic
Colour:
Yellow-, yellow-green, ...
Hardness:
2 - 3
Name:
Named after its discovery locality, Terlingua, Brewster County, Texas, USA.
This page provides mineralogical data about Terlinguaite.

Classification of Terlinguaite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.DD.20

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
D : With Hg
10.4.2.1

10 : OXYHALIDES AND HYDROXYHALIDES
4 : A2(O,OH)Xq
8.5.3

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
5 : Halides of Zn and Hg
mindat.org URL:
http://www.mindat.org/min-3914.html
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First Recorded Occurrence of Terlinguaite

Year of Discovery:
1900
Associated Minerals at First Recorded Locality:

Physical Properties of Terlinguaite

Adamantine
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Yellow-, yellow-green, brown (darkens to olive-green on exposure to light); pale olive-green in transmitted light
Streak:
Lemon yellow
Hardness (Mohs):
2 - 3
Tenacity:
Brittle
Cleavage:
Perfect
On {_101}
Density:
8.725 g/cm3 (Measured)    8.73 g/cm3 (Calculated)

Crystallography of Terlinguaite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 19.51Å, b = 5.91Å, c = 9.47Å
β = 143.81°
Ratio:
a:b:c = 3.301 : 1 : 1.602
Unit Cell Volume:
V 644.75 ų (Calculated from Unit Cell)
Morphology:
Crystals prismatic [010] and often somewhat flattened on {001}; rarely prismatic in a pyramidal direction; also equidimensional, or thick tabular {001}. Pulverulent; massive aggregates of imperfect crystals (Dana, 7th. ed.: 53).

Crystallographic forms of Terlinguaite

Crystal Atlas:
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Click on an icon to view
Terlinguaite no.7 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Optical Data of Terlinguaite

Type:
Biaxial (-)
RI values:
nα = 2.350 nβ = 2.640 nγ = 2.660
2V:
Measured: 20° , Calculated: 26°
Max Birefringence:
δ = 0.310
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong
Pleochroism:
Weak
Comments:
Slightly pleochroic in green and yellow.

Chemical Properties of Terlinguaite

Formula:
(Hg22+)Hg22+Cl2O2
Essential elements:
All elements listed in formula:

Relationship of Terlinguaite to other Species

3.DD.05Eglestonite(Hg22+)3OCl3(OH)
3.DD.05Kadyrelite(Hg22+)3OBr3(OH)
3.DD.10Poyarkovite(Hg22+)3Cl2O2
3.DD.15Hanawaltite(Hg22+)3Hg2+(Cl,OH)2O3
3.DD.25PinchiteHg52+Cl2O4
3.DD.30Gianellaite(Hg2N)2SO4
3.DD.30Mosesite(Hg2N)(Cl,SO4,MoO4) · H2O
3.DD.35Kleinite(Hg2N)(Cl,SO4) · nH2O
3.DD.40Tedhadleyite(Hg2+)5Hg2+I2(Cl,Br)2O4
3.DD.45Vasilyevite(Hg2+)10I3Br2Cl(CO3)O6
3.DD.50Aurivilliusite(Hg2+)0.5Hg2+(I,Br,Cl)O
3.DD.55TerlinguacreekiteHg32+Cl2O2
3.DD.60Kelyanite(Hg2+)6Sb3+BrCl2O6
3.DD.65ComancheiteHg552+N243–(NH2,OH)4(Cl,Br)34
8.5.1SimonkolleiteZn5Cl2(OH)8 · H2O
8.5.2Calomel(Hg22+)Cl2
8.5.4Poyarkovite(Hg22+)3Cl2O2
8.5.5PinchiteHg52+Cl2O4
8.5.6Eglestonite(Hg22+)3OCl3(OH)
8.5.7Kadyrelite(Hg22+)3OBr3(OH)
8.5.8ComancheiteHg552+N243–(NH2,OH)4(Cl,Br)34
8.5.9Kuzminite(Hg22+)(Br,Cl)2
8.5.10Moschelite(Hg22+)I2
8.5.11Tocornalite(Ag,Hg)I

Other Names for Terlinguaite

Name in Other Languages:

Other Information

Other Information:
Turns black immediately when treated with hydrogen sulfide. Ammonia causes a slower change to black. Decomposed with separation of calomel by acetic, hydrochloric, and nitric 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 Terlinguaite

Reference List:
Mining Sci. Press, San Francisco, 21 July 1900.

Moses (1903) American Journal of Science: 16: 255.

Hillebrand and Schaller (1909) USGS Bulletin 405: 83.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 52-56.

Acta Crystallographica (1956): 9: 956.

Internet Links for Terlinguaite

Specimens:
The following Terlinguaite specimens are currently listed for sale on minfind.com.

Localities for Terlinguaite

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.
Austria
 
  • Tyrol
    • North Tyrol
      • Inn valley
        • Brixlegg - Schwaz area
          • Brixlegg - Rattenberg
            • Geyer - Silberberg District
              • Silberberg
Schnorrer, G. and Poeverlein, R. (2002) Schwaz-Brixlegg-Fundstellen: 2. Die Minerale des Stockerstollens bei Brixlegg in Tirol. Aufschluss, 53, 209-228.
Germany
 
  • Rhineland-Palatinate
    • Palatinate
      • Alsenz-Obermoschel
Lapis 2001(6), 13-40
Stephan Wolfsried collection
Dreyer, G. (1975): Neue Mineralien in der Rheinpfalz II, Mitteilungen der Pollichia, 63, 5-9.
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
[Lapis 1993:11 p11-24]
      • Fergana Valley
[Lapis 11:11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mexico
 
  • Guerrero
    • Mun. de Taxco
      • Hauhauxtla
Panczner (1987): 135-372.
      • Huahuaxtla
Panczner(1987):372.
Panczner(1987):372.
  • San Luis Potosí
    • Mun. de Moctezuma
      • Moctezuma
        • Hacienda de Santa Antonio de Rul
Panczner(1987):135,164,185 & 372.; Percy Babb (1909) Dulces Nombres Quicksilver Deposit, Mexico. Engineering & Mining Journal 684-686.
Russia
 
  • Eastern-Siberian Region
    • Tuva Republic
      • Pii-Khem District
        • Uyuk Range
Canadian Mineralogist Feb. 1999
USA
 
  • Arkansas
    • Pike Co.
Roberts, A.C. et al (2003), The Canadian Mineralogist: 41(3): 721-725.
  • California
    • Kings Co.
      • Diablo Range
        • Parkfield District
          • Table Mountain
Bailey, Edgar H. (1942), Quicksilver deposits of the Parkfield district, California: USGS Bulletin 936-F: 159; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 115, 197.
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • Picacho Peak
Mineralogical Record: 36(4): 337-363.
    • San Mateo Co.
      • Emerald Lake Hills
        • Upper Emerald Lake
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 150, 260, 262, 362.
  • Nevada
    • Humboldt Co.
      • Opalite District
Rocks & Minerals, Nov. 1999
      • Poverty Peak District
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
  • Oregon
    • Malheur Co.
McCormack, J.K. (2000): Mineralium Deposita 35(8), 796-798.
  • Texas
    • Brewster Co.
Mining & Scientific Press, San Francisco, 21. July 1900; 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: 55; Mineralogical Record: 21: 233.
Rocks & Minerals: 66(3): 196-224.
Rocks & Minerals: 66(1): 202.
Kelly Nash Collection
Mineral and/or Locality  
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