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Alumohydrocalcite

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Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany
© Stephan Wolfsried

Show Alumohydrocalcite Photos (14)



Formula:
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
System:TriclinicColour:Chalky white to pale ...
Hardness:2½
Name:In allusion to the composition, containing ALUMinium, water (HYDRated) and a calcium carbonate (CALCITE) component.


Related to para-alumohydrocalcite.

Classification of Alumohydrocalcite

IMA status:Approved
Strunz 8th edition ID:5/E.04-30
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.2.3.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
2 : AmBn(XO3)pZqxH2O & with (m+n):p = 3:2
Hey's CIM Ref.:11.7.7

11 : Carbonates
7 : Carbonates of Al
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Type Occurrence of Alumohydrocalcite

Type Locality:Potekhina Village, Sorsk, Khakassia Republic (Khakassy Republic; Khakassiya Republic), Eastern-Siberian Region, Russia
Place of Conservation of Type Material:A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia,
77088.
Year of Discovery:1926
Associated Minerals at type locality:
WadVolborthiteMalachiteLimoniteCuprite
CopperAllophane

Occurrences of Alumohydrocalcite

Geological Setting:Formed at low temperature by the action of carbonated waters on allophane or dickite in dolomites and limestones; chromian varieties are typically formed near altering chromite from serpentinites.

Physical Properties of Alumohydrocalcite

Diaphaneity (Transparency):Transparent, Translucent, Opaque
Colour:Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in chromian varieties
Comment:colourless in transmitted light
Hardness (Mohs):2½
Tenacity:Brittle
Cleavage:Perfect
On {100}; on {010} imperfect.

Crystallography of Alumohydrocalcite

Crystal System:Triclinic
Morphology:As fibers and needles, to 2.5 mm; commonly in radial aggregates and spherulites, feltlike crystal linings, and powdery to chalky masses.
X-Ray Powder Diffraction:
d-spacingIntensity
7.21 (30)
6.50 (70)
6.25 (100)
3.23 (60)
2.860 (30)
2.519 (40)
2.039 (50)

Optical Data of Alumohydrocalcite

Type:Biaxial (-)
RI values: nα = 1.485 - 1.502 nβ = 1.553 - 1.562 nγ = 1.570 - 1.585
2V:Measured: 64° , Calculated: 50° to 60°
Maximum Birefringence:δ = 0.085

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:r > v strong

Chemical Properties of Alumohydrocalcite

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

Relationship of Alumohydrocalcite to other Species

Common Associates:
GypsumGibbsiteDickiteBaryteAragonite
Allophane
Related Minerals - Nickel-Strunz Grouping):

- +
5.DB.05Nasledovite
PbMn
 
3
Al
 
4
(CO
 
3
)
 
4
(SO
 
4
)O
 
5
 · 5H
 
2
O
5.DB.05Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
2
O
5.DB.05UM1977-02-CO:AlCaH
Ca
 
3
Al
 
2
(CO
 
3
)
 
3
O
 
6
 · 32H
 
2
O
5.DB.10Dresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Dundasite
PbAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Montroyalite
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
5.DB.10Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 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
(CO
 
3
)
 
2
(OH)
 
4
 · 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
 · 11H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.7.1Scarbroite
Al
 
5
(CO
 
3
)(OH)
 
13
 · 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
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.5Manasseite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.6Indigirite
Mg
 
2
Al
 
2
(CO
 
3
)
 
4
(OH)
 
2
 · 15H
 
2
O
11.7.8Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
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
 · 12H
 
2
O
11.7.11Montroyalite
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
11.7.12Dresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
11.7.13Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
11.7.14Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O

Other Names for Alumohydrocalcite

Synonyms:
AluminohydrocalciteKhakassite
Other Languages:
German:Aluminohydrocalcit
Alumohydrocalcit
Khakassit
Spanish:Aluminohydrocalcita
Alumohydrocalcita
Khakassita
Varieties:
Chromian AlumohydrocalciteKnipovichite

Other Information

Other Information:Readily soluble in acids. Decomposed by boiling water with separation of calcium carbonate and hydrous aluminum oxide.
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 Alumohydrocalcite

Reference List:

- +
Bilibine (1926) Mineralogicheskoe Obshchestvo, Leningrad, Zapiski: 55: 243.

American Mineralogist (1928): 13: 569.

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: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 280-281.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 55: 243-258.

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

Internet Links for Alumohydrocalcite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Alumohydrocalcite details from Handbook of Mineralogy (PDF)
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    • Localities for Alumohydrocalcite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Austria
     
    • Carinthia
      • Gailtaler Alpen & Karnische Alpen
        • Kötschach-Mauthen
          • Dellach
    		G. Blass, A. Pichler: Carinthia II 193./113.:181-188 (2003)
      • Hohe Tauern
        • Reißeck group
          • Gmünd
            • Radlgraben
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    France
     
    • Languedoc-Roussillon
      • Gard
        • Alzon
    		Patrice Queneau Collection
    Germany
     
    • North Rhine-Westphalia
      • Sauerland
        • Meschede
    		Schnorrer-Köhler, G., (1990): Ramsbeck - Neue Minerale aus dem ehemaligen Blei-Zink-Erzrevier des Sauerlandes, Der Aufschluss, Vol. 41 (4), 211-218
    • Rhineland-Palatinate
      • Eifel
        • Gerolstein
          • Birresborn
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
        • Hillesheim
    		Hentschel, G., Die Lavaströme der Graulai: eine neue Fundstelle in der Westeifel, Lapis, Weise Verlag München, 09/1993
        • Laach lake volcanic complex
          • Kruft
    		Blass, G.; Graf, H.W., Neue mineralogische Erkenntnisse und neue Funde aus Eifel, Schwarzwald und Siegerland, Mineralien-Welt 7/2, 55, 1996
          • Mendig
            • Niedermendig
    		Blass, G.; Graf, H.W., Neue mineralogische Erkenntnisse und neue Funde aus Eifel, Schwarzwald und Siegerland, Mineralien-Welt 7/2, 55, 1996
    Blass, G.; Graf, H.W., Neue mineralogische Erkenntnisse und neue Funde aus Eifel, Schwarzwald und Siegerland, Mineralien-Welt 7/2, 55, 1996
              • Wingertsberg
    		Blass, G.; Graf, H.W., Neue mineralogische Erkenntnisse und neue Funde aus Eifel, Schwarzwald und Siegerland, Mineralien-Welt 7/2, 55, 1996
    Hungary
     
    • Fejér Co.
      • Bicske-Zsámbéki Basin
        • Bicske-Csordakút
        • Mány
    		Sajó, I.E. & Szakáll, S. (2007): Canadian Mineralogist 45, 479-483.
    Italy
     
    • Tuscany
      • Grosseto Province
        • Massa Marittima
    		Sabelli C., Olmi F., Brizzi G., Meli R., 1996. Serrabottini (GR): recenti ritrovamenti nelle antiche discariche. Riv. Mineral. Ital., 19: 9-28.
      • Livorno Province
        • Campiglia Marittima
    		http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
        • Piombino
    		Muenchener Micromounter-Lithothek
      • Massa-Carrara Province
        • Apuan Alps
    		Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Gunma Prefecture
          • Fujioka
    		American Mineralogist (1986): 71, 1022-1027.
      • Kinki region
        • Mie Prefecture
          • Taki-cho
    		Alfredo Petrov specimens
        • Osaka Prefecture
    		The Mineral Species of Japan (5th ed) Matsubara
    Kyrgyzstan
     
    • Batken Oblast
    		Canadian Mineralogist: 43: 1511-1519.; Atali A. Agakhanov et al (2005) New Data on Minerals Vol 40 pp23-28
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Kłodzko District
        • Nowa Ruda (Neurode)
    		Eligiusz Szełęg private collection
          • Przygórze
    		Hoehne K. 1953: Ein neues Vorkommen von chromhaltigen Alumohydrocalcit im niederschlesischen Bergbaugebiet. Neues Jb. Miner. Monatsh. H. 1
    Russia
     
    • Eastern-Siberian Region
      • Khakassia Republic (Khakassy Republic; Khakassiya Republic)
        • Sorsk
    		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: 281.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Slovakia
     
    • Košice Region
      • Rožňava Co.
        • Kečovo
    		Cílek V., 1999: Mineralogické výskumy v jeskyni Domica. Aragonit, 4, 9 – 11
    • Prešov Region
      • Bardejov Co.
    		Bačo,P.,Pacindová,M., 1993: Whewellit a dawsonit - epigenetická mineralizácia v puklinách pieskovca pri Cígeľke. Min.Slovaca,Bratislava, 4,277-281p
      • Svidník Co.
    		Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
    Spain
     
    • Catalonia
      • Barcelona
        • Baix Llobregat
          • Gavà
            • Bruguers
    		Bareche, E (2005) "Els minerals de Catalunya. Segle XX" Ed. Grup Mineralògic Català, Barcelona, 269 p.
        • Vallès Occidental
          • Montcada i Reixac
    		Mineralogistes de Catalunya (1997), VII (1): 34-55
    UK
     
    • England
      • Somerset
        • Cranmore
    		Turner, R.W. and Rumsey, M.S. (2010): Mineral Relationships in the Mendip Hills. Journal of the Russell Society, vol 13, pp 3-46; Turner R.W. and Rumsey, M.S. (2007) Merehead Mineralogy - an Update. Russell Soc Newsletter, No 50, pp 17-18 (March 2007)
      • South Gloucestershire (Bristol; Avon)
        • Tytherington Quarries
    		BMS Database
    USA
     
    • California
      • Santa Clara Co.
        • Diablo Range
          • Mount Hamilton
    		[var: Chromian Alumohydrocalcite] Dunning, G.E., J.F. Cooper, and J.S. White (1975) Chromian alumohydrocalcite from California and knipovichite discredited. Mineralogical Record: 6: 180-183; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 198.
      • Stanislaus Co.
        • Diablo Range
          • Henry Coe State Park
    		[var: Chromian Alumohydrocalcite] Dunning, G. E. (2000): Chromian dawsonite and chromian alumohydrocalcite from Orestimba Creek, Stanislaus County, California. Mineralogical Record 31, 333-338.
    • Nevada
      • Nye Co.
        • Gabbs District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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