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Montroydite

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About MontroyditeHide

Formula:
HgO
Colour:
Deep red, brownish red to brown; Orange-red to pale yellow in transmitted light, with decreasing thickness
Lustre:
Sub-Adamantine, Vitreous
Hardness:
1½ - 2
Specific Gravity:
11.23
Crystal System:
Orthorhombic
Name:
After Montroyd Sharp (1861 England - ), an owner of the Terlingua, Texas, USA, mine where it was found. (He resided in Santa Cruz California in the 1930's and donated his mineral collection to museum in city)
This page provides mineralogical data about Montroydite.


Classification of MontroyditeHide

Approved, 'Grandfathered' (first described prior to 1959)
4.AC.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
C : M:O = 1:1 (and up to 1:1.25); with large cations (+- smaller ones)
4.2.6.1

4 : SIMPLE OXIDES
2 : AX
7.5.12

7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg

Physical Properties of MontroyditeHide

Sub-Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Deep red, brownish red to brown; Orange-red to pale yellow in transmitted light, with decreasing thickness
Streak:
Yellow-brown
Hardness:
1½ - 2 on Mohs scale
Tenacity:
Sectile
Cleavage:
Perfect
Perfect {010}.
Density:
11.23 g/cm3 (Measured)    11.22 g/cm3 (Calculated)

Optical Data of MontroyditeHide

Type:
Biaxial (+)
RI values:
nα = 2.370 nβ = 2.500 nγ = 2.650
Max Birefringence:
δ = 0.280
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong

Chemical Properties of MontroyditeHide

Formula:
HgO

Crystallography of MontroyditeHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmmn
Cell Parameters:
a = 5.52 Å, b = 6.6 Å, c = 3.52 Å
Ratio:
a:b:c = 0.836 : 1 : 0.533
Unit Cell V:
128.24 ų (Calculated from Unit Cell)
Morphology:
Long prismatic[001]; also equant or rarely flattened {111}. Terminal faces often striated; on {011} parallel [100], on {201} parallel [101], the pyramids often with several sets of striae. As wormlike, tubular, or spherical aggregates consisting usually of minute prismatic crystals. Massive, pulverulent, or banded. Crystals often bent or twisted.
Twinning:
Crystals glide readily: bent-gliding and twist-gliding with T{010} and t[001]; also other, unidentified gliding elements.

Crystallographic forms of MontroyditeHide

Crystal Atlas:
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Montroydite no.1 - Goldschmidt (1913-1926)
Montroydite no.14 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011897MontroyditeAurivillius K (1964) Least-squares refinement of the crystal structures of orthorhombic HgO and of Hg2O2NaI Acta Chemica Scandinavica 18 1305-13061964synthetic0293
CIF Raw Data - click here to close

Type Occurrence of MontroyditeHide

Other Language Names for MontroyditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
9 photos of Montroydite associated with MercuryHg
9 photos of Montroydite associated with CinnabarHgS
5 photos of Montroydite associated with Edgarbaileyite[Hg2]2+3[Si2O7]
4 photos of Montroydite associated with Terlinguaite[Hg3]4+Hg2+Cl2O2
3 photos of Montroydite associated with QuartzSiO2
3 photos of Montroydite associated with Kleinite(Hg2N)(Cl,SO4) · nH2O
2 photos of Montroydite associated with CalciteCaCO3
1 photo of Montroydite associated with Eglestonite[Hg2]2+3OCl3(OH)

Related Minerals - Nickel-Strunz GroupingHide

4.AC.05SwedenborgiteNaBe4Sb5+O7Hex. 6mm : P63mc
4.AC.10BrownmilleriteCa2(Al,Fe3+)2O5Orth. mm2
4.AC.10SrebrodolskiteCa2Fe3+2O5Orth. mmm (2/m 2/m 2/m) : Pnma
4.AC.20LithargePbOTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.AC.20RomarchiteSnOTet.
4.AC.25MassicotPbOOrth. mmm (2/m 2/m 2/m) : Cmmm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.5.1ZinciteZnOHex. 6mm : P63mc
7.5.2SweetiteZn(OH)2Tet.
7.5.3AshoveriteZn(OH)2Tet.
7.5.4WülfingiteZn(OH)2Orth. 2 2 2 : P21 21 21
7.5.5GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.5.6HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.5.7HydrohetaeroliteZnMn2O4 · H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.5.8ChalcophaniteZnMn4+3O7 · 3H2OTrig. 3 : R3
7.5.9WoodruffiteZn2+x/2(Mn4+1-xMn3+x)O2 · yH2OMon. 2/m : B2/m
7.5.10FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.5.11MonteponiteCdOIso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

Health Risks:
Contains mercury - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

References for MontroyditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moses (1903), American Journal of Science: 16: 259.
Hllebrand and Schaller (1909), USGS Bulletin 405: 47.
Bird (1932), American Mineralogist: 17: 541.
Acta Chemica Scandinavica: 10: 852-866.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 511-514.
Acta Crystallographica (1956): 685.

Internet Links for MontroyditeHide

Localities for MontroyditeHide

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.
Belgium
 
  • Wallonia
    • Luxembourg
      • Vielsalm
        • Salmchâteau
http://perso.infonie.be/jose.dehove/photos/Salmchateau.htm
China
 
  • Guangxi
    • Guilin
      • Lingui Co.
Deqian Wang and Yiting Hou (1987): Journal of Mineralogy and Petrology 8(4), 38-42
  • Sichuan
    • Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture)
      • Baiyü County
Xiaoming Qu, Qiling Zhang, Zengqian Hou, Yuanping Xu, and Jinzhong Li (2001): Mineral Deposits 20(3), 199-207
Italy
 
  • Tuscany
    • Grosseto Province
      • Castell'Azzara
Manfred Kampf collection See Simone Beccari message Not confirmed
    • Siena Province
      • Piancastagnaio
Kyrgyzstan
 
  • Batken Region
[Lapis 11:11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Vasil'yev, V. I., Lavrent'yev, Y. G., & Pal'chik, N. A. (1982). Poyarkovite, Hg3CIO, a new natural mercury oxychloride. International Geology Review, 24(3), 363-366.
  • Osh Region
[Lapis 1993:11 p11-24]
Mexico
 
  • Guerrero
    • Taxco de Alarcón
Gallagher, D., & Siliceo, R. P. (1948). Geology of the Huahuaxtla Mercury District, State of Guerrero, Mexico (USGS Bulletin 960). US Government Printing Office.
Panczner (1987): 135-372.
  • Queretaro
    • Cadereyta Municipality
      • El Doctor (Doctor)
Panczner (1987): 279.
Russia
 
  • Tuva
    • Pi-Khem District
      • Uyuk Range
Canadian Mineralogist Feb. 1999; Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
        • Oorash-Khem River Valley
Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
Spain
 
  • Castile-La Mancha
    • Ciudad Real
      • Almadén mining district
        • Almadenejos
Sainz de Baranda Graf, B and Menor salvan, C. (2019) The Almadén mining district, Ciudad Real, Spain. The Mineralogical Record, 50 (1), 11-60.
USA
 
  • Arkansas
    • Pike Co.
Roberts, A.C. et al (2003), The Canadian Mineralogist: 41(3): 721-725.
  • California
    • Kings Co.
      • Parkfield Mining District
        • Table Mountain
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181.
    • Lake Co.
      • Knoxville Mining District
        • Knoxville area
Bradley, W.W. (1938), Thirty-fourth report of the State Mineralogist: California Division Mines Report 34: 608; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 273; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181.
    • Monterey Co.
      • Parkfield Mining District
        • Parkfield
          • Table Mountain
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181.
    • Napa Co.
      • Knoxville Mining District
        • Knoxville
Kim, C. S., Rytuba, J. J., & Brown Jr, G. E. (2004). Geological and anthropogenic factors influencing mercury speciation in mine wastes: an EXAFS spectroscopy study. Applied Geochemistry, 19(3), 379-393.
    • San Benito Co.
      • New Idria Mining District
        • Goat Mountain
Canadian Mineralogist: 34: 61-72.; Mineralogical Record (1993): 24: 471-475.
        • Picacho Peak
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 273.
    • San Mateo Co.
      • Redwood City
Woodhouse, C.D. (1934), A new occurrence of montroydite in California: American Mineralogist: 19: 603-604; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181.
Mining and Scientific Press (1868), Quicksilver in San Mateo County (from San Mateo Gazette): Mining and Scientific Press: 16: 357; Woodhouse, C.D. (1934), A new occurrence of montroydite in California: American Mineralogist: 19: 603; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 260.
Woodhouse, C.D. (1934), A new occurrence of montroydite in California: American Mineralogist: 19: 603-604; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 119, 174, 273.
    • Sonoma Co.
      • West Mayacmas Mining District
        • Black Oaks
          • Sulphur Creek
Bradley, W.W. (1938), Thirty-fourth report of the State Mineralogist: California Division Mines Report 34: 608; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 274; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181.
        • Castle Rock Springs area
Bailey, Edgar H. (1946), Quicksilver deposits of the western Mayacmas district, Sonoma County, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 216; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181; Mineralogical Record (1989) 20: 129-142.
  • Nevada
    • Humboldt Co.
      • Opalite Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Poverty Peak Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Mineral Co.
      • Borealis Mining District
        • Borealis mine
NBMG Spec. Pub. 31 Minerals of Nevada
    • Nye Co.
      • Bare Mountain
        • Bare Mountain Mining District (Fluorine Mining District)
NBMG Spec. Pub. 31 Minerals of Nevada
      • Paradise Peak Mining District
        • Paradise Peak [summit]
          • Paradise Peak [town]
NBMG Spec. Pub. 31 Minerals of Nevada
Econ Geol (1989) 84:631-649
    • White Pine Co.
      • Robinson Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
  • Texas
    • Brewster Co.
Rocks & Minerals: 66(1): 202.
American Journal of Science, series 4 (1903): 16: 253; 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: 52, 90.
 
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