IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Mellite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About MelliteHide

Formula:
Al2[C6(COO)6] · 16H2O
Colour:
Honey to wax yellow, brown to reddish, gray, seldom white; colourless to pale yellow in transmitted light.
Lustre:
Vitreous, Resinous, Greasy
Hardness:
2 - 2½
Specific Gravity:
1.64
Crystal System:
Tetragonal
Name:
From the Greek μέλι ("meli") = honey, in allusion to the colour.
Aluminium mellitate (benzene hexacarboxylate) hydrate.

A rare secondary mineral in lignite deposits.

Visit gemdat.org for gemological information about Mellite.


Classification of MelliteHide

Approved, 'Grandfathered' (first described prior to 1959)
10.AC.05

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
C : Benzine Salts
Dana 7th ed.:
50.2.1.1
50.2.1.1

50 : ORGANIC COMPOUNDS
2 : Mellitates, Citrates, Cyanates, Acetates and Formates
31.3.1

31 : Oxalates, Citrates, Mellitates and Acetates
3 : Mellitates

Physical Properties of MelliteHide

Vitreous, Resinous, Greasy
Transparency:
Transparent, Translucent
Colour:
Honey to wax yellow, brown to reddish, gray, seldom white; colourless to pale yellow in transmitted light.
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Sectile
Cleavage:
Poor/Indistinct
On {023}, indistinct
Fracture:
Conchoidal
Density:
1.64 g/cm3 (Measured)    1.65 g/cm3 (Calculated)

Optical Data of MelliteHide

Type:
Uniaxial (-)
RI values:
nω = 1.539 nε = 1.511
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Weak
Comments:
O = yellowish brown
E = Yellow
Comments:
May be anomalously biaxial.
2V (measured)= Small.

Chemical Properties of MelliteHide

Formula:
Al2[C6(COO)6] · 16H2O
IMA Formula:
Al2C6(COO)6 · 16H2O

Crystallography of MelliteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Cell Parameters:
a = 15.53 Å, c = 23.19 Å
Ratio:
a:c = 1 : 1.493
Unit Cell V:
5,592.99 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals dipyramidal {023}, also prismatic, elongated [001], modified by {001},{010}, and {113}; also occurs as nodules and coatings; fine-grained massive.

Crystallographic forms of MelliteHide

Crystal Atlas:
Image Loading
Click on an icon to view
Mellite no.2 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indices | Axes

Transparency
Opaque | Translucent | Transparent

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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.99 (100)
5.80 (55)
5.16 (40)
4.23 (70)
3.46 (30)
3.39 (30)
2.985 (25)

Type Occurrence of MelliteHide

Synonyms of MelliteHide

Other Language Names for MelliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite3 photos of Mellite associated with Calcite on mindat.org.
Gypsum2 photos of Mellite associated with Gypsum on mindat.org.
Perovskite1 photo of Mellite associated with Perovskite on mindat.org.
Pyroxene Group1 photo of Mellite associated with Pyroxene Group on mindat.org.
Humboldtine1 photo of Mellite associated with Humboldtine on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

10.AC.10EarlanditeCa3[CH2(COO)-CHOH(COO)-CH2(COO)]2 · 4H2OMon.
10.AC.15PigotiteAl4C6H5O10 · 13H2O (?)

Fluorescence of MelliteHide

Paleyellow to blue (LW & SW UV).

Other InformationHide

Electrical:
Pyroelectric
Notes:
Insoluble in water and alcohol but soluble in HNO3.
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 MelliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Werner, A.G. & C.A.S. Hoffmann (1789): Mineralsystem des Herrn Inspektor Werners mit dessen Erlaubnis herausgegeben von C.A.S. Hoffmann.- Bergmännisches Journal 2, Vol. 1, p. 369-398 (as Honigstein).
Karsten, D.L.G. (1789): Des Herrn Nathanael Gottfried Leske hinterlassenes Mineralienkabinett, systematisch geordnet und beschrieben, auch mit vielen wissenschaftlichen Anmerkungen und mehreren äussern Beschreibungen der Fossilien begleitet.- Leipzig, Vol. 1, p. 334-335 (as Honigstein).
Born, I. von (1790) Catalogue méthodique et raisonné de la collection des fossils de Mlle. Eleonore de Raab. 4 volumes, 8vo, Vienna: 2: 90 (as Succin transparent en cristaux octaèdres; as Pierre de miel).
Kirwan, R. (1796) Elements of Mineralogy. second edition: 2: 68 (as Mellilite).
Klaproth, M.H. (1802): Untersuchung des Honigsteins, Beiträge zur chemischen Kenntniss der Mineralkörper, Dritter Band, Rottmann Berlin, 114-134
Becquerel (1819) Le Journal de physique et le radium, Paris: 89: 237 (as Xylocryptite).
Haüy, R.J. (1822) Traité de minéralogie. second edition, 4 volumes, with fol. Atlas: 4: 445.
Dauber (1855) Annalen der Physik, Halle, Leipzig: 94: 410.
Schrauf (1860) Konigliche Akademie der Wissenschaften, Vienna, Sitzber.: 41.
Des Cloizeaux, A. (1867) Nouvelles recherches sur les propriétés optique des cristaux, naturels ou artificiels, et sur les variations que ces propriétés éprouvent sous l’influence de la chaleur. 222pp., Paris. (Institut imperial de France, Mémoires 18): 15.
Hankel (1883) Annalen der Physik, Halle, Leipzig: 18: 422.
Goldschmidt, V. (1920) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 6: 28.
Doelter, C. (1930) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 4 [3]: 798.
Barth and Ksanda (1933) American Mineralogist: 18: 8.
Hintze, Carl (1933) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4B]: 1346.
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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1104-1105.
Jobbins, E.A., G.A. Sergeant, and B.R. Young (1965) X-ray and other data for mellite. Mineralogical Magazine: 35: 271, 542-544.
Giacovazzo, C., S. Menchetti, and F. Scordari (1973) The crystal structure of mellite. Acta Crystallographica (1973): B29: 26-31.
Robl, C. & Kuhs, W.F. (1991): A neutron diffraction study on hydrogen bonding in the mineral mellite (Al2[C6(COO)6]·16H2O) at 15 K. Journal of Solid State Chemistry, 92, 101-109.

Internet Links for MelliteHide

Localities for MelliteHide

ⓘ - 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.
Austria
 
  • Carinthia
    • Gailtaler Alpen & Karnische Alpen
      • Kötschach-Mauthen
        • Laas
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Czech Republic
 
  • Central Bohemia Region
    • Skřivaň
Duda, Rejl, Slivka: "Mineralien", 1991
  • South Moravia Region
    • Boskovice (Boskowitz)
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: 1105.
  • Ústí Region
    • Bílina (Bilin)
Petr Fuchs specimen
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: 1105.
France
 
  • Ile-de-France
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: 1105.
Germany
 
  • Saxony-Anhalt
    • Bitterfeld
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: 1105.
  • Thuringia
    • Unstrut valley
D.L.G. Karsten (1789): Des Herrn Nathanael Gottfried Leske hinterlassenes Mineralienkabinett, ......- Leipzig, Vol. 1, p. 334-335; 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: 1105.
Hungary
 
  • Fejér Co.
    • Bicske-Zsámbéki Basin
      • Bicske-Csordakút
Annual report of the Hungarian Geological Survey 1991 p421; [www.johnbetts-fineminerals.com]
Italy
 
  • Apulia
    • Lecce Province
      • Castro
Garavelli C.L., Quagliarella Asciano F., Vurro F. (1974): Mellite di Grotta Romanelli (Otranto). Per. Mineral., 43, 39-49.
Russia
 
  • Tul’skaya Oblast’
    • Bogorodetsk District
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: 1105.; Mineralogical Magazine 35:542-544
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 21, 2018 19:51:08 Page generated: October 21, 2018 02:18:38
Go to top of page