Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch 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 ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Mimetite

This page kindly sponsored by Bob Cooke
Formula:
Pb5(AsO4)3Cl
Colour:
Pale-yellow, yellowish-brown, orangish-yellow, orangish-red, white, colorless; colourless or faintly tinted in transmitted light.
Lustre:
Sub-Adamantine, Resinous
Hardness:
3½ - 4
Specific Gravity:
7.24
Crystal System:
Hexagonal
Name:
Named in 1835 by François Sulpice Beudant from the Greek μϊμητής for "imitator," in allusion to its resemblance to pyromorphite.
Polymorph of:
Isostructural with:
Apatite Group.
Apatite Supergroup.
Mimetite-Pyromorphite Series and Mimetite-Vanadinite Series.
The arsenate analogue of Pyromorphite and Vanadinite.
The Pb5 analogue of Hedyphane.
The hexagonal polymorph of Mimetite-M and Mimetite-2M.
The Cl analogue of Unnamed (OH-analogue of Mimetite).

A secondary mineral found in the oxidized zones of lead deposits. Usually found as small hexagonal prisms, often plain but may be modified, sprinkled on the matrix thinly to thickly. Its colour is quite variable, ranging from pale yellow to yellowish-brown to orange-yellow to orange-red, brownish, greenish, white and colorless.

Visit gemdat.org for gemological information about Mimetite.


Hide all sections | Show all sections

Classification of MimetiteHide

Approved, 'Grandfathered' (first described prior to 1959)
7/B.39-160
8.BN.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
Dana 7th ed.:
41.8.4.2
41.8.4.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq
22.2.10

22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride

Physical Properties of MimetiteHide

Sub-Adamantine, Resinous
Transparency:
Transparent, Translucent
Colour:
Pale-yellow, yellowish-brown, orangish-yellow, orangish-red, white, colorless; colourless or faintly tinted in transmitted light.
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
In traces on {1011}.
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
7.24 g/cm3 (Measured)    7.26 g/cm3 (Calculated)

Optical Data of MimetiteHide

Type:
Uniaxial (-)
RI values:
nω = 2.147 nε = 2.128
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Weak
Comments:
Visible in tinted material in transmitted light.
Comments:
May be anomalously biaxial - . Sectored

Chemical Properties of MimetiteHide

Formula:
Pb5(AsO4)3Cl
Common Impurities:
Ca,F,Cr,V

Crystallography of MimetiteHide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 10.250(2) Å, c = 7.454(1) Å
Ratio:
a:c = 1 : 0.727
Unit Cell V:
678.22 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Typically in simple prisms [0001], barrel-shaped, showing {1010} and {1000}; also equant, rarely tabular {0001}, or pyramidal. Frequently as rounded, barrel-shaped forms; spindle-shaped, or with cavernous basal terminations; globular, stalactic, reniform and granular. Branching groups of prismatic crystals in sub-parallel position, tapering down to a point. Acicular at times.
Twinning:
Very rarely on {1122}.
Comment:
On synthetic material.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
4.44(20)
3.36(40)
3.06(100)
3.01(90)
2.96(70)
2.11(30)
1.994(20)
1.905(20)
Comments:
Data given are for synthetic material.

Type Occurrence of MimetiteHide

Synonyms of MimetiteHide

Other Language Names for MimetiteHide

Varieties of MimetiteHide

BelliteInitially thought to be a supposed arsenate-chromate of lead associated with crocoite and mimetite (Magnet Mine, Tasmania). An uncredited chemical analysis mentioned in passing suggested a mixture of Crocoite, Mimetite and Quartz. It has also been suggest...
Calcian MimetiteA calcium-bearing Mimetite, with calcium substituting for lead.
CampyliteA variety of Mimetite forming barrel-shaped crystals.
Chromian MimetiteA bright red, chromium-bearing variety of mimetite.
See also bellite.
PrixiteSaid to be a hydrous arsenate of lead [Leymerie, 1859, Cours Min. 2:284], it is probably Mimetite. [Clark, 1993 - "Hey's Mineral Index"]
Originally reported from Les Molérats Mine, Saint-Prix, Beuvray, Saône-et-Loire, Burgundy, France.
Vanadian MimetiteA vanadium-bearing variety of mimetite.

Relationship of Mimetite to other SpeciesHide

Other Members of this group:
AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
HydroxylpyromorphitePb5(PO4)3(OH)
JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
OxypyromorphitePb10(PO4)6O
PieczkaiteMn5(PO4)3ClHex. 6/m : P63/m
PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
StronadelphiteSr5(PO4)3FHex. 6/m : P63/m
SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
TurneaureiteCa5(AsO4)3ClHex.
Unnamed (F-analogue of Pyromorphite)Pb5(PO4)3F
Unnamed (OH-analogue of Mimetite)Pb5(AsO4)3(OH)
VanadinitePb5(VO4)3ClHex. 6/m : P63/m
Forms a series with:

Common AssociatesHide

AnglesitePbSO4
BayldonitePbCu3(AsO4)2(OH)2
CaledonitePb5Cu2(SO4)3(CO3)(OH)6
CerussitePbCO3
DescloizitePbZn(VO4)(OH)
HemimorphiteZn4Si2O7(OH)2 · H2O
LeadhillitePb4(CO3)2(SO4)(OH)2
Limonite(Fe,O,OH,H2O)
MalachiteCu2(CO3)(OH)2
MottramitePbCu(VO4)(OH)
SmithsoniteZnCO3
VanadinitePb5(VO4)3Cl
WulfenitePb(MoO4)
Associated Minerals Based on Photo Data:
Wulfenite1,480 photos of Mimetite associated with Wulfenite on mindat.org.
Calcite266 photos of Mimetite associated with Calcite on mindat.org.
Quartz217 photos of Mimetite associated with Quartz on mindat.org.
Baryte192 photos of Mimetite associated with Baryte on mindat.org.
Cerussite184 photos of Mimetite associated with Cerussite on mindat.org.
Malachite130 photos of Mimetite associated with Malachite on mindat.org.
Fluorite128 photos of Mimetite associated with Fluorite on mindat.org.
Willemite117 photos of Mimetite associated with Willemite on mindat.org.
Hemimorphite115 photos of Mimetite associated with Hemimorphite on mindat.org.
Beudantite90 photos of Mimetite associated with Beudantite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BN.05AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)Hex.
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)Hex.
8.BN.05ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
8.BN.05Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
8.BN.05FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
8.BN.05HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
8.BN.05JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
8.BN.05MorelanditeCa2Ba3(AsO4)3Cl
8.BN.05PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
8.BN.05FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
8.BN.05SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05TurneaureiteCa5(AsO4)3ClHex.
8.BN.05VanadinitePb5(VO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(La)NaLaSr3(PO4)3FTrig. 3 : P3
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5Trig.
8.BN.05FluorcaphiteSrCaCa3(PO4)3FHex. 6/m : P63/m
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5Trig. 3 : P3
8.BN.05Hydroxylapatite-MCa5(PO4)3OHMon. 2/m : P21/b
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3ClHex. 6/m : P63/m
8.BN.05StronadelphiteSr5(PO4)3FHex. 6/m : P63/m
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3FTrig. 3 : P3
8.BN.05Miyahisaite(Sr,Ca)2Ba3(PO4)3F Hex. 6/m : P63/m
8.BN.10ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m

Related Minerals - Dana Grouping (8th Ed.)Hide

41.8.4.1PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
41.8.4.3VanadinitePb5(VO4)3ClHex. 6/m : P63/m
41.8.4.3FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.2.1SampleiteNaCaCu5(PO4)4Cl · 5H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
22.2.2LavendulanNaCaCu5(AsO4)4Cl · 5H2OMon. 2/m
22.2.3ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
22.2.4TurneaureiteCa5(AsO4)3ClHex.
22.2.5ShubnikoviteCa2Cu8(AsO4)6(OH)Cl · 7H2O
22.2.6RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m
22.2.7AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
22.2.8MorelanditeCa2Ba3(AsO4)3Cl
22.2.9PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
22.2.11Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
22.2.12SahlinitePb14(AsO4)2O9Cl4Mon.
22.2.13GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
22.2.14VanadinitePb5(VO4)3ClHex. 6/m : P63/m
22.2.15KombatitePb14(VO4)2O9Cl4Mon.
22.2.16LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam
22.2.17HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
22.2.18NealitePb4Fe2+(As3+O3)2Cl4 · 2H2OTric. 1 : P1

Fluorescence of MimetiteHide

May fluoresce reddish yellow under SW and LW

Other InformationHide

Electrical:
Piezoelectric.
Notes:
Soluble in HNO3 and KOH.

Forms pseudomorphs after an unknown mineral (Anglesite ?) (Durango, Mexico). Also alters to Bayldonite (Tsumeb).
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 MimetiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Wallerius, J.G. (1748) Mineralogia, eller Mineralriket. Stockholm: 296 (as Plumbum arsenico mineralisatum).
Proust (1787) Le Journal de physique et le radium, Paris: 30: 394 (as Plomb vert arsenical).
Fourcroy (1789) Mem. Ac. Sc., Paris (as Plomb vert arsenical).
Lenz, D.G. (1794) Versuch einer vollständigen Anleitung zur Kenntniss der Mineralien. 2 volumes, Leipzig: 2: 224 (as Arsenikalisches Bleyerz).
Haidinger, Wm. (1825) Treatise on Mineralogy, by F. Mohs; translation with considerable additions. 3 volumes, Edinburg: 2: 135.
Beudant, F.S. (1832) Traité élémentaire de Minéralogie, second edition, 2 volumes: 2: 594 (as Mimetèse).
Shepard C.U. (1835) Treatise on Mineralogy. First edition (as Mimetene).
Breithaupt, A. (1841) Vollständige Handbuch der Mineralogie. Vol. 2: 289 (as Mimetesit).
Haidinger, Wm. (1845) (as Mimetit).
Glocker, E.F. (1847) Generum et specierum mineralium secundum ordines naturales digestorum synopsis. Halle: 254 (as Mimetit).
Igelström (1865) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 22: 229.
Baumhauer (1876) Jb. Min.: 411.
Bertrand (1881) Bulletin de la Société française de Minéralogie: 4: 35.
Jannettaz (1881) Bulletin de la Société française de Minéralogie: 4: 39.
Jannettaz and Michel (1881) Bulletin de la Société française de Minéralogie: 4: 196.
Smith (1885) American Journal of Science: 20: 248.
Genth and vom Rath (1887) Proceedings of the American Philosophical Society: 24: 33.
Klein (1902) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 748.
Bowman, H.L. (1903) Note on the Refractive Indices of Pyromorphite, Mimetite, and Vanadinite. Mineralogical Magazine: 13: 324-329.
Serra (1909) Reale accademia nazionale dei Lincei, Rome: 18: 361.
Lacroix, A. (1910) Minéralogie de la France et des ses colonies, Paris. 5 volumes: vol. 4: 407 (Bertrand analysis).
Goldschmidt and Schroeder (1912) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 51: 362.
Amadori (1916) 1st. Lombardo, Rend.: [2], 49, 137.
McDonnell, C.C., Smith, C.M. (1916) The preparation and properties of lead-chlor arsenate, artificial mimetite. American Journal of Science: 42: 139-145.
Wherry (1918) Proceedings of the U.S. National Museum: 54: 373.
Anderson (1920) Rec. Australian Museum: 13: 1.
Goldschmidt, V. (1920) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 6: 45.
Hintze, Carl (1924) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4A]: 590, 595, 603.
Carobbi (1926) Atti della Reale accademia delle scienze fisiche e matematiche, Naples, Rend.: [3], 32, 54.
Drescher (1926) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 257.
Aminoff and Parsons (1927) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 49: 438.
Zambonini and Ferrari (1928) Reale accademia nazionale dei Lincei, Rome, Atti.: [6], 7, 283.
Lietz (1931) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 77: 437.
Mehmel (1931) Zeitschrift für Physikalische Chemie, Leipzig, Berlin: 15A: 223.
Ahlfeld (1932) Jb. Min., Beil.-Bd.: 66: 41.
Hendricks, Jefferson, Mosley (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 81: 352.
Schouten, C. (1934) Structures and texture of synthetic replacements in "open space". Economic Geology: 29: 611-658.
Chirva (1935) Trav. inst. Lomonossov, ac. Sc. U.R.S.S., no.: 5: 86.
Mélon (1943) Société géologique de Belgique, Liége, Annales: 66: B56.
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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 889-895.
Baker, W.E. (1966) An X-ray diffraction study of synthetic members of the pyromorphite series. American Mineralogist: 51: 1712-1721.
Fleischer, M. (1969) New mineral names. American Mineralogist: 54: 990-994.
Sumin de Portilla, V.I. (1974) Infrared spectroscopic investigation of the structure of some natural arsenates and the nature of H-bonds in their structures. The Canadian Mineralogist: 12: 262-268.
Sokolova, E.V., Egorov-Tismenko, Yu.K. (1982) Study of crystalline structures of rare arsenates: duftite and mimetite. Vestnik Moskovskogo Universiteta, Geologiya: 37: 50-56.
Zeitschrift für Kristallographie (1990): 191: 125-129.
Dai, Y., Hughes, J.M., Moore, P.B. (1991) The crystal of mimetite and clinomimetite, Pb5(AsO4)3Cl. Canadian Mineralogist: 29: 369-376.
Gaines, R.V., Catherine, H., Skinner, W., Foord, E.E., Mason, B., Rosenzweig, A. (1997) Dana's New Mineralogy: The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 866.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 376.
Baikie, T., Ferraris, C., Klooster, W.T., Madhavi, S., Pramana, S.S., Pring, A., Schmidt, G., White, T.J. (2008) Crystal chemistry of mimetite, Pb10(AsO4)6Cl1.48O0.26, and finnemanite, Pb10(AsO3)6Cl2. Acta Crystallographica: B64: 34-41.
Lyalina, L.M., Savchenko, Y.E., Selivanova, E.A., Zozulya, D.R. (2010) Behoite and mimetite from the Saharjok alkaline intrusion, Kola Peninsula. Geology of Ore Deposits: 52: 641-645.
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J.R., White, T.J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy: 22: 163-179.
Flis, J., Manecki, M., Bajda, T. (2011) Solubility of pyromorphite Pb5(PO4)3Cl - mimetite Pb5(AsO4)3Cl solid solution series. Geochimica et Cosmochimica Acta: 75: 1858-1868.
Okudera, H. (2013) Relationships among channel typology and atomic displacements in the structures of Pb5(BO4)3Cl with B = P (pyromorphite), V (vanadinite), and As (mimetite). American Mineralogist: 98: 1573-1579.

Internet Links for MimetiteHide

Localities for MimetiteHide

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 ListShow

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 1993-2017, 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: July 28, 2017 16:03:52 Page generated: July 27, 2017 18:04:07
Go to top of page