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Melanophlogite

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Formula:
46SiO2 · 6(N2,CO2) · 2(CH4,N2)
System:
Tetragonal
Colour:
Colorless, white, ...
Hardness:
6½ - 7
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.


Classification of Melanophlogite

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

Type Occurrence of Melanophlogite

Physical Properties of Melanophlogite

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

Crystallography of Melanophlogite

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

Crystallographic forms of Melanophlogite

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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Chemical Properties of Melanophlogite

Formula:
46SiO2 · 6(N2,CO2) · 2(CH4,N2)
All elements listed in formula:
Common Impurities:
ORG,C,H,S

Relationship of Melanophlogite to other Species

4.DA.Carbon Dioxide IceCO2
4.DA.05QuartzSiO2
4.DA.10OpalSiO2 · nH2O
4.DA.10TridymiteSiO2
4.DA.15CristobaliteSiO2
4.DA.20MogániteSiO2
4.DA.30LechatelieriteSiO2
4.DA.35CoesiteSiO2
4.DA.40StishoviteSiO2
4.DA.45KeatiteSiO2
4.DA.50SeifertiteSiO2

Other Names for Melanophlogite

Name in Other Languages:

Other Information

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 Melanophlogite

Reference List:
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.

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 Melanophlogite

mindat.org URL:
http://www.mindat.org/min-2630.html
Please feel free to link to this page.
Specimens:
The following Melanophlogite specimens are currently listed for sale on minfind.com.

Localities for Melanophlogite

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.
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.
Mineral and/or Locality  
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