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Chlormagaluminite

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Formula:
Mg4Al2(OH)12Cl2 · 3H2O
System:
Hexagonal
Hardness:
1½ - 2½
Name:
For its composition: chloride, magnesium and aluminium
This page provides mineralogical data about Chlormagaluminite.

Classification of Chlormagaluminite

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
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Type Occurrence of Chlormagaluminite

Year of Discovery:
1982

Physical Properties of Chlormagaluminite

Hardness (Mohs):
1½ - 2½

Crystallography of Chlormagaluminite

Crystal System:
Hexagonal
Cell Parameters:
a = 5.29Å, c = 15.46Å
Ratio:
a:c = 1 : 2.922
Unit Cell Volume:
V 374.67 ų (Calculated from Unit Cell)

Optical Data of Chlormagaluminite

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 Chlormagaluminite

Formula:
Mg4Al2(OH)12Cl2 · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Chlormagaluminite to other Species

Other Members of Group:
CaresiteFe42+Al2(OH)12[CO3] · 3H2O
CharmariteMn42+Al2(OH)12[CO3] · 3H2O
ComblainiteNi4Co2(OH)12[CO3] · 3H2O
QuintiniteMg4Al2(OH)12[CO3] · 3H2O
ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2O
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2O
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2O
5.DA.05UM1986-10-CO:ClHMgMnZnMg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)2 · 6H2O ?
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2O
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2O
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2O
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2O
5.DA.30Claraite(Cu,Zn)3(CO3)(OH)4 · 4H2O
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2O
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2O
5.DA.40CaresiteFe42+Al2(OH)12[CO3] · 3H2O
5.DA.40QuintiniteMg4Al2(OH)12[CO3] · 3H2O
5.DA.40CharmariteMn42+Al2(OH)12[CO3] · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2O
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2O
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2O
5.DA.45Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2O
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2O
5.DA.50DesautelsiteMg6Mn23+(OH)16[CO3] · 4H2O
5.DA.50HydrotalciteMg6Al2(OH)16[CO3] · 4H2O
5.DA.50Pyroaurite-3RMg6Fe23+(OH)16[CO3] · 4H2O
5.DA.50ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
5.DA.50StichtiteMg6Cr2(OH)16[CO3] · 4H2O
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2O
5.DA.50UM1998-10-CO:CoHNiCo6Fe2(CO3)(OH)16 · 4H2O ?
5.DA.55CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O
12.1.1NorthupiteNa3Mg(CO3)2Cl
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3F
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)
12.1.6BrenkiteCa2(CO3)F2
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5
12.1.8Bastnäsite-(Ce)(Ce,La)(CO3)F
12.1.9Bastnäsite-(La)(La,Ce)(CO3)F
12.1.10Bastnäsite-(Y)(Y,Ce)(CO3)F
12.1.11Parisite-(Ce)Ca(Ce,La)2(CO3)3F2
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)Ca(Ce,La)(CO3)2F
12.1.14Synchysite-(Y)Ca(Y,Ce)(CO3)2F
12.1.15Synchysite-(Nd)Ca(Nd,Y,Gd)(CO3)2F
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F
12.1.19Huanghoite-(Ce)BaCe(CO3)2F
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3F
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteTh(Ca,Ce)(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2
12.1.24BarstowitePb4Cl6(CO3) · H2O
12.1.25AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2O
12.1.26KettneriteCaBiCO3OF

Other Names for Chlormagaluminite

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 Chlormagaluminite

Reference List:
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.



Internet Links for Chlormagaluminite

Localities for Chlormagaluminite

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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Can Min 32:843 - 854 (1994)
Russia (TL)
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya 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
Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.; Mazurov et al (2007) Geology of Ore Deposits, 49, 271–284.
Mineral and/or Locality  
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