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Para-alumohydrocalcite

Formula:
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
·6H
 
2
O
Name:Named for the relation to alumohydrocalcite.


Related to alumohydrocalcite.

Classification of Para-alumohydrocalcite

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID:5.DB.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
Dana 8th edition ID:16b.2.3.2

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
2 : AmBn(XO3)pZqxH2O & with (m+n):p = 3:2
Hey's CIM Ref.:11.7.8

11 : Carbonates
7 : Carbonates of Al
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Type Occurrence of Para-alumohydrocalcite

Co-type Localities:Vodinskoye Deposit, Samaraskaya Oblast' (Samara Oblast'), Povolzhsky Region, Russia
Mine No. 3, Gaurdak Deposit (Gaurdok Deposit), Chardzhou, Lebap Province, Turkmenistan
X-Ray Powder Diffraction:
d-spacingIntensity
7.90 (100)
6.20 (30)
4.04 (20)
3.90 (25)
3.32 (28)
2.68 (24)

Optical Data of Para-alumohydrocalcite

Type:Biaxial (-)
RI values: nα = 1.473 nβ = 1.492 nγ = 1.502
2V:Measured: 69° , Calculated: 70°
Maximum Birefringence:δ = 0.029

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Para-alumohydrocalcite

Formula:
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
·6H
 
2
O
Essential elements:Al, C, Ca, H, O
All elements listed in formula:Al, C, Ca, H, O

Relationship of Para-alumohydrocalcite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DB.05Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
·3H
 
2
O
5.DB.05Nasledovite
PbMn
 
3
Al
 
4
(CO
 
3
)
 
4
SO
 
4
O
 
5
·5H
 
2
O
5.DB.05UM1977-02-CO:AlCaH
Ca
 
3
Al
 
2
O
 
6
(CO
 
3
)
 
3
·32H
 
2
O
5.DB.10Dresserite
BaAl
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · H
 
2
O
5.DB.10Dundasite
PbAl
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · H
 
2
O
5.DB.10Montroyalite
Sr
 
4
Al
 
8
[(OH,F)
 
26
|(CO
 
3
)
 
3
] · 10-11H
 
2
O
5.DB.10Strontiodresserite
(Sr,Ca)Al
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · H
 
2
O
5.DB.10Petterdite
PbCr
3+
2
(CO
 
3
)
 
2
(OH)
 
4
·H
 
2
O
5.DB.10Kochsándorite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.15Hydrodresserite
BaAl
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · 3H
 
2
O
5.DB.20Schuilingite-(Nd)
PbCu(Nd,Gd,Sm,Y)(CO
 
3
)
 
3
(OH)·1.5H
 
2
O
5.DB.25Sergeevite
Ca
 
2
Mg
 
11
(CO
 
3
)
 
13
·10H
 
2
O
5.DB.30Szymańskiite
Hg
 
16
(Ni,Mg)
 
6
(CO
 
3
)
 
12
(OH)
 
12
(H
 
3
O)
 
8
·3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.7.1Scarbroite
Al
 
5
(OH)
 
13
CO
 
3
·5H
 
2
O
11.7.2Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
·nH
 
2
O
11.7.3Dawsonite
NaAlCO
 
3
(OH)
 
2
11.7.4Hydrotalcite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
11.7.5Manasseite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
11.7.6Indigirite
Mg
 
2
Al
 
2
[(CO
 
3
)
 
4
(OH)
 
2
] · 15H
 
2
O
11.7.7Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
·3H
 
2
O
11.7.9Tunisite
NaCa
 
2
Al
 
4
(CO
 
3
)
 
4
(OH)
 
8
Cl
11.7.10Wermlandite
Mg
 
7
(Ca,Mg)(Al,Fe)
 
2
(SO
 
4
)
 
2
(OH)
 
18
(H
 
2
O)
 
12
11.7.11Montroyalite
Sr
 
4
Al
 
8
[(OH,F)
 
26
|(CO
 
3
)
 
3
] · 10-11H
 
2
O
11.7.12Dresserite
BaAl
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · H
 
2
O
11.7.13Hydrodresserite
BaAl
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · 3H
 
2
O
11.7.14Strontiodresserite
(Sr,Ca)Al
 
2
[(OH)
 
2
|CO
 
3
]
 
2
 · H
 
2
O

Other Names for Para-alumohydrocalcite

Synonyms:
IMA1976-027
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Para-alumohydrocalcite

Reference List:American Mineralogist (1978): 63: 794.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 106: 336-337.

Zapiski Rossiyskogo Mineralogicheskogo Obshchestva: 55: 243-258.

Neues Jahrbuch für Mineralogie, Monatshefte (1969): 130-137.

Internet Links for Para-alumohydrocalcite

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  • Raman and XRD data at RRUFF project
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    Localities for Para-alumohydrocalcite

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