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UM1987-05-OH:AlCMg

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Formula:
Mg4Al2(OH)12(CO3,SO4) · 3H2O
more specifically [Mg4Al2(OH)12][(SO4)0.5(CO3)0.5•3H2O]
Specific Gravity:
2.06 (Calculated)
Compare the stoichiometrically identical (or similar) quintinite and 'quintinite-3T'. Also compare UM1996-25-OH:AlCMg.

The phase represents an ordered ABAB-type alternation (16.5-Å-ordered phase) of 7.56 Å and 8.94 Å layers; the sulfate anion is located in the interlayers. The first layer is brucite-like, while the second contains the carbonate groups.

Exact localities not stated. The phase (together with other potentially new minerals of the supergroup) was found within salt deposits of (1) the Middle Asia, and within (2) Lower Permian rocks of the pre-Caspian depression. Other associated minerals include quartz, chalcedony, chlorite group, biotite, "oxylepidomelane", zircon, garnet group, titanite, anhydrite, kieserite, langbeinite, and various borates at "1"; quartz, chalcedony, anhydrite, magnesite, Mg-rich chlorite group, and illite at "2".


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Unique IdentifiersHide

Mindat ID:
51523
Long-form identifier:
mindat:1:1:51523:4

Similar NamesHide

UM1996-25-OH:AlCMgInvalid as an unnamed mineral

Classification of UM1987-05-OH:AlCMgHide

Strunz-mindat (2026):
5.DA.40

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

Physical Properties of UM1987-05-OH:AlCMgHide

Density:
2.06 g/cm3 (Calculated)

Chemistry of UM1987-05-OH:AlCMgHide

Mindat Formula:
Mg4Al2(OH)12(CO3,SO4) · 3H2O

more specifically [Mg4Al2(OH)12][(SO4)0.5(CO3)0.5•3H2O]
Element Weights:
Element% weight
O61.362 %
Mg20.715 %
Al11.498 %
H3.866 %
C2.559 %

Calculated from ideal end-member formula.
Elements listed:
Al, C, H, Mg, O, S - search for minerals with similar chemistry

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.25 Å(100)
4.125 Å(88)
5.50 Å(17)
3.30 Å(8)
16.5 Å(1.5)
2.73 Å(1)
2.357 Å(1)

Relationship of UM1987-05-OH:AlCMg to other SpeciesHide

Member of:
Hydrotalcite Supergroup
Other Members of Hydrotalcite Supergroup:
Akopovaite Al4Li2(OH)12(CO3)(H2O)3Mon. 2/m : B2/m
AmoraiteCa12Al6(OH)36(CO3)2(SO3) · 15H2O Tric. 1 : P1
BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
CarbocalumiteCa4Al2(OH)12(CO3) · 6H2OTrig. 3m(32/m) : R3c
CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig. 3m(32/m) : R3m
Cualstibite GroupM2R(OH)6[Sb5+(OH)6], where M = Zn, Ni, Cu and R = Al or Fe3+
DritsiteLi2Al4(OH)12Cl2 · 3H2OHex. 6/mmm(6/m2/m2/m) : P63/mcm
Fougèrite Group
Glaucocerinite Group
Hydrocalumite Group
Hydrotalcite GroupM6R3+2(OH)16Z · 4H2O, where M=Mg, Fe, Ni, R3+ = Al, Cr, Co or Fe, and Z=CO3, Cl
Marioantofilliite[Cu4Al2(OH)12](CO3) · 3H2OMon. 2/m : B2/m
MuskoxiteMg7Fe4O13 · 10H2OTrig. 3m(32/m)
PoellmanniteCa6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
Quintinite Group
RotemiteCa4Cr2(OH)12Cl2 · 4H2OTrig. 3m(32/m) : R3c
Wermlandite GroupM7R3+2(OH)18[Ca(H2O)6][SO4]2 · 6H2O, where = Mg, Fe, Zn and R= Al or Fe
Woodwardite GroupMay be considered a subgroup of the Hydrotalcite Group.

Related Minerals - Strunz-mindat GroupingHide

5.DA.AlexkhomyakoviteK6(Ca2Na)(CO3)5Cl · 6H2OHex. 6/mmm(6/m2/m2/m) : P63/mcm
5.DA.AmoraiteCa12Al6(OH)36(CO3)2(SO3) · 15H2O Tric. 1 : P1
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2OMon. 2 : P21
5.DA.05'UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)'Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05'UM1987-01-CO:HMgS'Mg4(CO3)2(OH)4 · 6H2O ?Mon.
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon. 2/m : P21/b
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2OMon. 2/m : P21/b
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2OMon. 2/m : B2/m
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2OTrig. 3m : R3c
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O ?Iso.
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2OOrth.
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2OHex. 6 : P63
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon. 2/m : B2/b
5.DA.30Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14 · 7H2OTric. 1 : P1
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2OTric.
5.DA.40KarchevskyiteMg18Al9(OH)54Sr2(CO3)9(H2O)6(H3O)5Trig.
5.DA.40QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 622 : P6322
5.DA.40CharmariteMn2+4Al2(OH)12[CO3] · 3H2OHex.
5.DA.40CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig. 32 : P3112
5.DA.45'Hydrotalcite-2H'Mg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
5.DA.45'Stichtite-2H'Mg6(Cr,Al)2(CO3)(OH)16 · 4H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.
5.DA.45'Pyroaurite-2H'Mg6Fe3+2(OH)16(CO3) · 4H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
5.DA.45LiudongshengiteZn4Cr2(OH)12(CO3) · 3H2OTrig. 3m(32/m) : R3m
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex. 6/mmm(6/m2/m2/m) : P63/mcm
5.DA.50PyroauriteMg6Fe3+2(OH)16[CO3] · 4H2OTrig. 3m(32/m) : R3m
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2OTrig. 3m(32/m) : R3m
5.DA.50ReevesiteNi6Fe3+2(OH)16(CO3) · 4H2OTrig. 3m(32/m) : R3m
5.DA.50KaznakhtiteNi6Co3+2(CO3)(OH)16 · 4H2OTrig. 3 : R3
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2OTrig.
5.DA.50Marioantofilliite[Cu4Al2(OH)12](CO3) · 3H2OMon. 2/m : B2/m
5.DA.50HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m(32/m) : R3m
5.DA.50StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m(32/m) : R3m
5.DA.50DesautelsiteMg6Mn3+2(OH)16[CO3] · 4H2OTrig. 3m(32/m)
5.DA.55CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig. 3m(32/m) : R3m
5.DA.55Akopovaite Al4Li2(OH)12(CO3)(H2O)3Mon. 2/m : B2/m
5.DA.60ŠlikiteZn2Mg(CO3)2(OH)2 · 4H2OTric. 1 : P1
5.DA.65MarkliteCu5(CO3)2(OH)6 · 6H2OMon. 2/m : P21/b

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.

Internet Links for UM1987-05-OH:AlCMgHide

References for UM1987-05-OH:AlCMgHide

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