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Melanophlogite

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Formula:
46SiO2 · 6(N2,CO2) · 2(CH4,N2)
Colour:
Colorless, white, water-clear (pale yellow to deep red brown with impurities)
Lustre:
Vitreous
Hardness:
6½ - 7
Crystal System:
Tetragonal
Name:
Named in 1876 by A. von Lasaulx for the Greek words for 'black' and 'to be burned' because some specimens turn black when heated.
First recognized natural clathrasil (or silica clathrate); compare bosoite and chibaite - the other natural clathrasils.


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Classification of MelanophlogiteHide

Approved
4.DA.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
A : With small cations: Silica family
75.2.2.1

75 : TECTOSILICATES Si Tetrahedral Frameworks
2 : Si Tetrahedral Frameworks - SiO2 with H2O and organics

Physical Properties of MelanophlogiteHide

Vitreous
Colour:
Colorless, white, water-clear (pale yellow to deep red brown with impurities)
Streak:
White
Hardness:
6½ - 7 on Mohs scale

Chemical Properties of MelanophlogiteHide

Formula:
46SiO2 · 6(N2,CO2) · 2(CH4,N2)
IMA Formula:
C2H17O5 · Si46O92
Common Impurities:
ORG,C,H,S

Crystallography of MelanophlogiteHide

Crystal System:
Tetragonal
Cell Parameters:
a = 26.82 Å, c = 13.37 Å
Ratio:
a:c = 1 : 0.499
Unit Cell V:
9,617.21 ų (Calculated from Unit Cell)

Crystallographic forms of MelanophlogiteHide

Crystal Atlas:
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Melanophlogite no.2 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Type Occurrence of MelanophlogiteHide

Other Language Names for MelanophlogiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Magnesite13 photos of Melanophlogite associated with Magnesite on mindat.org.
Sulphur10 photos of Melanophlogite associated with Sulphur on mindat.org.
Chalcedony10 photos of Melanophlogite associated with Chalcedony on mindat.org.
Aragonite5 photos of Melanophlogite associated with Aragonite on mindat.org.
Volkonskoite4 photos of Melanophlogite associated with Volkonskoite on mindat.org.
Cinnabar2 photos of Melanophlogite associated with Cinnabar on mindat.org.
Dolomite2 photos of Melanophlogite associated with Dolomite on mindat.org.
Bitumen2 photos of Melanophlogite associated with Bitumen on mindat.org.
Goethite2 photos of Melanophlogite associated with Goethite on mindat.org.
Chibaite1 photo of Melanophlogite associated with Chibaite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.DA.Carbon Dioxide IceCO2
4.DA.05QuartzSiO2Trig. 3 2 : P31 2 1
4.DA.10OpalSiO2 · nH2O
4.DA.10TridymiteSiO2Tric. 1
4.DA.15CristobaliteSiO2Tet. 4 2 2 : P41 21 2
4.DA.20MogániteSiO2Mon.
4.DA.30LechatelieriteSiO2
4.DA.35CoesiteSiO2Mon. 2/m : B2/b
4.DA.40StishoviteSiO2Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
4.DA.45KeatiteSiO2
4.DA.50SeifertiteSiO2Orth. mmm (2/m 2/m 2/m) : Pbcn

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.

References for MelanophlogiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
von Lasaulx, A. (1876) Mineralogisch-kristallographische Notizen. VII. Melanophlogit, ein neues Mineral. Neues Jahrbuch für Mineralogie: 250-257.
Bertrand, E. (1880) Sur la thaumasite et al mélanophlogite. Bulletin de la Société Française de Minéralogie: 3: 159-160.
Spezia, G. (1883) Osservazioni sulla melanoflogite. Atti R. Acc. Lincei: 15: 300-310.
Pisani, F. (1888) Melanophlogite. Bulletin de la Société Française de Minéralogie: 11: 298-300.
Mallard, E. (1890) Note sur la mélanophlogite. Bulletin de la Société Française de Minéralogie: 13: 180-182.
Friedel, G. (1890) Sur la mélanophlogite. Bulletin de la Société Française de Minéralogie: 13: 356-372.
Streng, A. (1890) Bemerkungen über den Melanophlogit. Oberhessische Gesellschaft für Natur- und Heilkunde: 27: 123-128.
Bombicci, E. (1891) Nuove ricerche sulla melanoflogite della miniera Giona pressa Racalmuto. Memorie della Accademia delle Scienze dell'Istituto di Bologna.
Friedel, G. (1891) Sur la mélanophlogite. Bulletin de la Société Française de Minéralogie: 14: 74-76.
Streng, A. (1891) Über den Melanophlogit. Neues Jahrbuch für Mineralogie: 2: 211-214.
Panebianco, R. (1891) Sulla forma crisallina della melanophlogite. Rivista di Mineralogia e Cristallografia italiana: 10: 81.
Friedel, G. (1892) Sur une nouvelle publication relative a la mélanophlogite. Bulletin de la Société Française de Minéralogie: 15: 49-58.
Zambonini, F. (1906) Einige Beiobachtungen über die optschen Eigenschaften der Melanophlogite. Zeitschrift für Kristallographie: 41: 48-52.
Manzella, E. (1918) Contributo alla conoscenza della composizione chimica della melanophlogite. Annali di Chimica applicata: 9: 91-100.
Skinner, B.J., Appleman, D.E. (1963) Melanophlogite, a cubic polymorph of silica. American Mineralogist: 48: 854-867.
Cooper, J.F., Dunning, G.E. (1972) Melanophlogite from Mount Hamilton, Santa Clara County, California. American Mineralogist: 57: 1494-1504.
Žák, L. (1972) A contribution to the crystal chemistry of melanophlogite. American Mineralogist: 57: 779-796.
Gies, H. (1983) Studies on clathrasils. III. Crystal structure of melanophlogite, a natural clathrate compound of silica. Zeitschrift für Kristallographie: 164: 247-257.
Nakagawa, T., Kihara, K., Harada, H. (2001) The crystal structure of low melanophlogite. American Mineralogist: 86: 1506-1512.
Dunning, G.E., Cooper, J.F. Jr. (2002) Pseudomorphic Melanophlogites from California. Mineralogical Record: 33: 237-242.
Adorni, F., Tadeo, F., Adorni, B. (2004) La melanoflogite di Case Montanini. Rivista Mineralogica Italiana: 3: 126-136.
Nakagawa, T., Kihara, K., Fujinami, S. (2005) X-ray studies of structural changes in melanophlogite with varying temperature. Journal of Mineralogical and Petrological Sciences: 100: 247-259.
Adorni, F., Tateo, F. (2007) A new melanophlogite occurence from The Case Montanini Quarry, Parma, Northern Appennines, Italy. Axis: 3: 1-12.
Tribaudino, M., Artoni, A., Mavris, Ch., Bersani, D., Lottici, P.P., Belletti, D. (2008) Single-crystal X-ray and Raman investigation on melanophlogite from Varano Marchesi (Parma, Italy). American Mineralogist: 93: 88-94.
Beard, A.D., Howard, K., Carmody, L., Jones, A.P. (2013) The origin of melanophlogite, a clathrate mineral, in natrocarbonatite lava at Oldoinyo Lengai, Tanzania. American Mineralogist: 98: 1998-2006 .

Internet Links for MelanophlogiteHide

Localities for MelanophlogiteHide

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.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Pardubice Region
Žák L.: Find of pyrophanite and melanophlogite in Chvaletice (E. Bohemia). Časopis pro mineralogii a geologii, 1967, 12, 4, 451-452. Žák L.: A contribution to the crystal chemistry of melanophlogite. American Mineralogist, 1972, 57, 779-796
    • Ústí Region
      • Most
Filippi, M.: Melanoflogit – vzácný polymorf hmoty SiO2 a jeho druhý výskyt v České republice. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 2002, roč. 10, s. 120-130.
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
        • Rožná deposit
Petr Pauliš, Stanislav Kopecký, Pavel Černý: Uranové minerály České republiky a jejich lokality. (2007)
Italy
 
  • Emilia-Romagna
    • Parma Province
      • Medesano
        • Sant'Andrea Bagni
Adorni, F., Tateo, F., Adorni, B. (2004): La melanoflogite di Case Montanini (S. Andrea Bagni, Medesano, Appennino parmense). Rivista Mineralogica Italiana, 28, 126-136. Tribaudino, M., Artoni, A., Mavris, C., Bersani, D., Lottici, P.P., Belletti, D. (2008): Single-crystal X-ray and Raman investigation on melanophlogite from Varano Marchesi (Parma, Italy). American Mineralogist, 93, 88-94.
Adorni, F., Tateo, F., Adorni, B. (2004): La melanoflogite di Case Montanini (S. Andrea Bagni, Medesano, Appennino parmense). Rivista Mineralogica Italiana, 28, 126-136.
  • Piedmont
    • Torino Province
      • Canavese District
        • Léssolo
          • Cálea
http://www.webmineralshop.com/articoli/brosso_eng.htm
  • Sicily
    • Caltanissetta Province
      • Milena (Milocca)
Lasaulx (von) A. (1876 a): Mineralogisch-kristallographische Notizen. VII. Melanophlogit, ein neues Mineral. Neues Jahrb. Miner. Geol. Palaeont., 250-257; Lasaulx (von) A. (1876 b): Weitere Bemerkungen über Melanophlogit. In: Briefwechsel. Mittheilungen an Professor G. Leonhard. Neues Jahrb. Miner. Geol. Palaeont., 627-629; Lasaulx (von) A. (1879): Beobachtungen in den Schwefeldistrikten von Sicilien. Neues Jahrb. Miner. Geol. Palaeont., 490-517; Spezia G. (1883): Osservazioni sulla melanoflogite. Atti R. Acc. Naz. Lincei, Memorie, Classe sci. fis. mat. nat., ser. 3, 15, 300-310; Pisani F. (1888): Melanophlogite. Bull. Soc. franç. Minéral., 11, 298-300; Friedel G. (1890): Sur la mélanophlogite. Bull. Soc. franç. Minéral., 13, 356-372; Mallard E. (1890): Note sur la mélanophlogite. Bull. Soc. franç. Minéral., 13, 180-182; Bombicci L. (1891): Nuove ricerche sulla melanoflogite della miniera Giona presso Racalmuto (Sicilia). Memorie Acc. Sci. Ist. Bologna, ser. 5, 1 (1890-91), 711-742; Friedel G. (1891): Sur la mélanophlogite. Bull. Soc. franç. Minéral., 14, 74-76; Friedel G. (1892): Sur une nouvelle publication relative a la mélanophlogite. Bull. Soc. franç. Minéral., 15, 49-58; Spezia G. (1892): Sulla origine del solfo nei giacimenti solfiferi della Sicilia. Tip. editrice G. Candeletti, Torino, 130 pp.; Zambonini F. (1906): Einige Beobachtungen über die optischen Eigenschaften der Melanophlogite. Zeit. Kristal., 41, 48-52; Skinner B.J., Appleman D.E. (1963): Melanophlogite, a cubic polymorph of silica. Am. Mineral., 48, 854-867; Žák L. (1972): A contribution to the crystal chemistry of melanophlogite. Am. Mineral., 57, 779-796; De Michele V. (1974): Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp.; Pagano R., Wilson W. (2012): The sulfur mines of Sicily. Mineralogical Record, 43, 161-206.
    • Palermo Province
Lasaulx (von) A. (1876): Weitere Bemerkungen über Melanophlogit. In: Briefwechsel. Mittheilungen an Professor G. Leonhard. Neues Jahrb. Miner. Geol. Palaeont., 627-629; Lasaulx (von) A. (1879): Beobachtungen in den Schwefeldistrikten von Sicilien. Neues Jahrb. Miner. Geol. Palaeont., 490-517; De Michele V. (1974): Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp.; Pagano R., Wilson W. (2012): The sulfur mines of Sicily. Mineralogical Record, 43, 161-206.
  • Tuscany
    • Livorno Province
      • Livorno
http://www.flashnet.it/users/fn25936n/
      • Rosignano Marittimo
Ref: Nannoni, R., & Sammartino, F. (1979). Guida ai minerali dei monti livornesi, Guide Calderini, Bologna.
Grassellini Troysi, M. & Orlandi, P. (1972): Sulla melanoflogite del Fortullino (Livorno). Atti della Società Toscana di Scienze Naturali, Memorie, Serie A: Processi Verbali, 79, 245-250; Gallo, S. (1974): Melanophlogite, a new and interesting find. Mineralogical Record, 5(5), 207-208; Henderson, B. (1981): Microminerals. Mineralogical Record, 12, 6, 383; Lenzi, A. (1996): La melanoflogite di località Fortullino. Informatore. Giornale del Museo di Storia Naturale Rosignano Solvay, 1, 10-13; Domenici, V., Lenzi, A., Taccone R. (2006): La melanoflogite di località Fortullino: uno studio strutturale del minerale. Codice Armonico 2006. Atti del Primo congresso di scienze naturali della Regione Toscana, 44-48; http://www.musrosi.org/wp-content/uploads/2014/07/CA2006.pdf
Japan
 
  • Honshu Island
    • Kanto region
      • Chiba prefecture
        • Minamiboso city
H. Imai collection
Ukraine
 
  • Crimea Oblast'
World of Stones v.9
      • Kerch peninsula (Kertch peninsula)
        • Opuk Mountain area
- Dvoichenko P.A. The minerals of Crimea (1914) - Zapiski Krymskogo obshchestva estestvoispytatelei (Proceeding of the Crimea Society of Naturalistes), 1914, vol. 4, p. 1-208 (Rus.) - Popov S.P. Mineralogy of the Crimea (1938). - M.-L., AN SSSR, 1938, 352 p. (Rus.)
USA
 
  • California
    • Los Angeles Co.
      • Encino
Housley, Robert M. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat article 1772 (http://www.mindat.org/article.php/1772/).
      • Santa Monica Mts
        • Agoura Hills
Chorazewicz, M. (2014) Three New Melanophlogite Pseudomorph Localities From Santa Monica Mountains, Southern California, Bulletin of the Mineralogical Society of Southern California: 87(8) (August, 2014): 6-9.
Chorazewicz, M. (2014) Three New Melanophlogite Pseudomorph Localities From Santa Monica Mountains, Southern California, Bulletin of the Mineralogical Society of Southern California: 87(8) (August, 2014): 6-9.
Chorazewicz, M. (2014) Three New Melanophlogite Pseudomorph Localities From Santa Monica Mountains, Southern California, Bulletin of the Mineralogical Society of Southern California: 87(8) (August, 2014): 6-9.
Housley, R. (2013) Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
DeVito, Alfred N., 1985. Microscoop (Lewis Road/Westlake Village microminerals). Bull. Min. Soc. So. Calif., Vol.55, no.10 (October 1985), p. 12. Housley, R., 2013. Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
        • Beverly Hills
          • Higgins Canyon
            • Head of Higgins Canyon
Housley, Robert (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat article 1772.
        • Calabasas
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
        • Malibu
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
    • Napa Co.
      • Lombard
Dunning, G.E. & Cooper, J.F. (2002): Pseudomorphic melanophlogites from California. Mineralogical Record 33: 237-242
    • Orange Co.
      • Newport Beach
Housley, R. (2013), Eleven New Melanophlogite Pseudomorph Occurrences in Southern California, Mindat.org article 1772.
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • Picacho Peak
Mineralogical Record: 36(4): 337-363.; Dunning, G.E. & Cooper, J.F. (2002): Pseudomorphic melanophlogites from California. Mineralogical Record 33: 237-242
Dunning, G.E. & Cooper, J.F. (2002): Pseudomorphic melanophlogites from California. Mineralogical Record 33: 237-242
    • San Mateo Co.
      • Pescadero
Dunning, G.E. & Cooper, J.F. (2002): Pseudomorphic melanophlogites from California. Mineralogical Record 33: 237-242
    • Santa Clara Co.
      • Diablo Range
        • Mount Hamilton
          • East Mount Hamilton area
Cooper, J.F. & G.E. Dunning (1972), Melanophlogite from Mount Hamilton, Santa Clara County, California: American Mineralogist: 57: 1494, 1495; Cooper, J.F. & G.E. Dunning (1973), Melanophlogite from Mount Hamilton, Santa Clara County, California: Erratum: American Mineralogist: 58: 346; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 354, 357; Mineralogical Record (2002): 33: 239.
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