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Chlormagaluminite

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About ChlormagaluminiteHide

Formula:
Mg4Al2(OH)12Cl2 · 3H2O
Hardness:
1½ - 2½
Crystal System:
Hexagonal
Name:
For its composition: chloride, magnesium and aluminium
Cl and H2O are located in the interlayer.


Classification of ChlormagaluminiteHide

Approved
5.DA.45

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
10.6.10.1

10 : OXYHALIDES AND HYDROXYHALIDES
6 : AmBn(O,OH)pXq
12.1.4

12 : Carbonates with other anions
1 : Carbonates with halides

Physical Properties of ChlormagaluminiteHide

Hardness:
1½ - 2½ on Mohs scale

Optical Data of ChlormagaluminiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.540 nε = 1.560
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of ChlormagaluminiteHide

Formula:
Mg4Al2(OH)12Cl2 · 3H2O
IMA Formula:
Mg4Al2(OH)12Cl2 · 2H2O

Crystallography of ChlormagaluminiteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mcm
Setting:
P63/mcm
Cell Parameters:
a = 5.268(3) Å, c = 15.297(8) Å
Ratio:
a:c = 1 : 2.904
Unit Cell V:
367.6 ų

Type Occurrence of ChlormagaluminiteHide

Synonyms of ChlormagaluminiteHide

Other Language Names for ChlormagaluminiteHide

Relationship of Chlormagaluminite to other SpeciesHide

Other Members of this group:
CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig.
CharmariteMn2+4Al2(OH)12[CO3] · 3H2OHex.
ComblainiteNi4Co2(OH)12[CO3] · 3H2OTrig.
QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 6 2 2 : P63 2 2
ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.

Related Minerals - Nickel-Strunz GroupingHide

5.DA.AlexkhomyakoviteK6(Ca2Na)(CO3)5Cl·6H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2OMon.
5.DA.05UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)4 · 6H2O ?Mon.
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2OMon.
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2OTrig. 3m : R3c
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2OOrth.
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O ?Iso.
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2OHex.
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon.
5.DA.30Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14·7H2OTric.
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
5.DA.40CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig.
5.DA.40QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 6 2 2 : P63 2 2
5.DA.40CharmariteMn2+4Al2(OH)12[CO3] · 3H2OHex.
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45Pyroaurite-2HMg6Fe3+2(OH)16(CO3) · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2OTrig.
5.DA.50DesautelsiteMg6Mn3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m)
5.DA.50HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50PyroauriteMg6Fe3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50ReevesiteNi6Fe3+2(OH)16(CO3) · 4H2OTrig.
5.DA.50StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50UM1998-10-CO:CoHNiNi6Co2(CO3)(OH)16 · 4H2O
5.DA.55CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

12.1.1NorthupiteNa3Mg(CO3)2ClIso. m3 (2/m 3) : Fd3
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4Tric.
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3FMon. 2/m : B2/b
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (xOrth. mmm (2/m 2/m 2/m) : Pnma
12.1.6BrenkiteCa2(CO3)F2Orth.
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5Mon. 2/m
12.1.8Bastnäsite-(Ce)Ce(CO3)FHex. 6 m2 : P6c2
12.1.9Bastnäsite-(La)La(CO3)FHex.
12.1.10Bastnäsite-(Y)Y(CO3)FHex. 6 m2 : P62c
12.1.11Parisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
12.1.14Synchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
12.1.15Synchysite-(Nd)CaNd(CO3)2FOrth.
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F Hex.
12.1.19Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m (3 2/m) : R3m
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3FTrig.
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2Mon. 2/m : B2/m
12.1.22ThorbastnäsiteThCa(CO3)2F2 · 3H2OHex. 6 m2 : P62c
12.1.23PhosgenitePb2CO3Cl2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
12.1.24BarstowitePb4Cl6(CO3) · H2OMon. 2/m : P21/m
12.1.25AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2OTric. 1 : P1
12.1.26KettneriteCaBiCO3OFOrth. mmm (2/m 2/m 2/m)

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 ChlormagaluminiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Almmann, R., Lohse, H.-H. (1966): Die Kristallstruktur des Sjögrenits und eines Umwandlungsproduktes des Koenenits ( = Chlor-Manasseits). N. Jahrbuch f. Mineralogie, Monatshefte, 2, 161-183.
American Mineralogist: 68: 849.
Periodico di Mineralogia: 11: 413.
Mills, S. J., A. G. Christy, J.-M. R. Genin, T. Kameda, and F. Colombo (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine 76(5), 1289-1336.
Zhitova, E.S., Krivovichev, S.V., Pekov, I.V., Yapaskurt, V.O. (2019): Crystal Chemistry of Chlormagaluminite, Mg4Al2(OH)12Cl2(H2O)2, a Natural Layered Double Hydroxide. Minerals: 9: 221; https://doi.org/10.3390/min9040221; https://www.mindat.org/forum.php?read,9,459667,459697#msg-459697

Internet Links for ChlormagaluminiteHide

Localities for ChlormagaluminiteHide

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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Can Min 32:843 - 854 (1994)
Czech Republic
 
  • Ústí nad Labem Region
    • Litoměřice District
      • Třebenice
Houzar, S., & ŠRein, V. (2008). Asociace geikielitu s kasiteritem ve spinelovém mramoru z Třebenic na západní Moravě, Moldanubikum. Acta rerum naturalium, 4, 1-6.
Russia (TL)
 
  • Irkutsk Oblast
    • Middle Angara River
ZVMO,(1982) 111, 121-127; International Geology Review (1983) 1938-2839, 25 (7), 848–853; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Zheleznogorsk (Korshunikha)
Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.
 
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