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Alumohydrocalcite

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Formula:
CaAl2(CO3)2(OH)4 · 4H2O
Previously assumed to have only three water molecules per formula unit.
Colour:
Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in chromian varieties
Hardness:
Crystal System:
Triclinic
Name:
In allusion to the composition, containing ALUMinium, water (HYDRated) and a calcium carbonate (CALCITE) component.
Hide all sections | Show all sections

Classification of AlumohydrocalciteHide

Approved, 'Grandfathered' (first described prior to 1959)
5.DB.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
16b.2.3.1

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

11 : Carbonates
7 : Carbonates of Al

Pronounciation of AlumohydrocalciteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of AlumohydrocalciteHide

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:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {100}; on {010} imperfect.

Optical Data of AlumohydrocalciteHide

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°
Max Birefringence:
δ = 0.085
Image 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 AlumohydrocalciteHide

Formula:
CaAl2(CO3)2(OH)4 · 4H2O

Previously assumed to have only three water molecules per formula unit.
IMA Formula:
CaAl2(CO3)2(OH)4 · 3H2O
Common Impurities:
Cr

Crystallography of AlumohydrocalciteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.71(5) Å, b = 6.54(4) Å, c = 14.6(2) Å
α = 81.8(3)°, β = 83.9(3)°, γ = 86.5(7)°
Ratio:
a:b:c = 0.873 : 1 : 2.232
Unit Cell V:
537 ų
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.21 (30)
6.50 (70)
6.25 (100)
3.23 (60)
2.860 (30)
2.519 (40)
2.039 (50)

Type Occurrence of AlumohydrocalciteHide

Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia,
77088.
Associated Minerals at Type Locality:

Synonyms of AlumohydrocalciteHide

Other Language Names for AlumohydrocalciteHide

Varieties of AlumohydrocalciteHide

Chromian AlumohydrocalciteA chromium-bearing variety of alumohydrocalcite.
KnipovichiteEquivalent to Chromian Alumohydrocalcite.
Discredited as a distinct species.

Relationship of Alumohydrocalcite to other SpeciesHide

Other Members of this group:
DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
KochsándoriteCaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
PetterditePbCr3+2(CO3)2(OH)4 · H2OOrth.
StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.
Unnamed (Ca-analogue of Petterdite)CaCr3+2(CO3)2(OH)4 · H2O

Common AssociatesHide

Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
AragoniteCaCO3
BaryteBaSO4
DickiteAl2(Si2O5)(OH)4
GibbsiteAl(OH)3
GypsumCaSO4 · 2H2O
Associated Minerals Based on Photo Data:
Azurite8 photos of Alumohydrocalcite associated with Azurite on mindat.org.
Allophane7 photos of Alumohydrocalcite associated with Allophane on mindat.org.
Malachite4 photos of Alumohydrocalcite associated with Malachite on mindat.org.
Carbonatecyanotrichite3 photos of Alumohydrocalcite associated with Carbonatecyanotrichite on mindat.org.
Calcite3 photos of Alumohydrocalcite associated with Calcite on mindat.org.
Siderite3 photos of Alumohydrocalcite associated with Siderite on mindat.org.
Fluorapatite2 photos of Alumohydrocalcite associated with Fluorapatite on mindat.org.
Clinopyroxene Subgroup2 photos of Alumohydrocalcite associated with Clinopyroxene Subgroup on mindat.org.
Pyrite2 photos of Alumohydrocalcite associated with Pyrite on mindat.org.
Millerite1 photo of Alumohydrocalcite associated with Millerite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.DB.05NasledovitePbMn3Al4(CO3)4(SO4)O5 · 5H2O
5.DB.05Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
5.DB.05UM1977-02-CO:AlCaHCa6Al2(CO3)3O6 · 32H2O
5.DB.10DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10MontroyaliteSr4Al8(CO3)3(OH,F)26 · 10-11H2O
5.DB.10StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.
5.DB.10PetterditePbCr3+2(CO3)2(OH)4 · H2OOrth.
5.DB.10KochsándoriteCaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
5.DB.15HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
5.DB.20Schuilingite-(Nd)PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O
5.DB.25SergeeviteCa2Mg11(CO3)9(HCO3)4(OH)4•6H2O
5.DB.30SzymańskiiteHg16(Ni,Mg)6(CO3)12(OH)12(H3O)8•3H2OHex.

Related Minerals - Dana Grouping (8th Ed.)Hide

16b.2.3.2Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.7.1ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
11.7.2HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
11.7.3DawsoniteNaAlCO3(OH)2Orth. mmm (2/m 2/m 2/m) : Imma
11.7.4HydrotalciteMg6Al2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
11.7.5Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex.
11.7.6IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
11.7.8Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
11.7.9TunisiteNaCa2Al4(CO3)4(OH)8ClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
11.7.10WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : P3c1
11.7.11MontroyaliteSr4Al8(CO3)3(OH,F)26 · 10-11H2O
11.7.12DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
11.7.13HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
11.7.14StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.

Other InformationHide

Notes:
Readily soluble in acids. Decomposed by boiling water with separation of calcium carbonate and hydrous aluminum oxide.
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 AlumohydrocalciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bilibine, G. (1926) Alumohydrocalcite - a new species. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva: 55: 243-258.
Foshag, W.F. (1928) New mineral names. American Mineralogist: 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.
Kautz, K. (1969) Elektronenbeugung und Infrarot-Untersuchungen an Alumohydrocalcit. Neues Jahrbuch für Mineralogie, Monatshefte: 1969: 130-137.
Paar, W., Ruscha, B.S. (1977) Ein Vorkommen von Alumohydrocalcit von Chitral, Westpakistan, and neue Beobachtungen an chromhaltigem Alumohydrocalcit von Nowej Rudy, Polen (= Neurode, Schlesien). Aufschluss: 28: 269-272.
Alabaster, C. (1989) Alumohydrocalcite from the Bristol District. J. Russell Soc., 2 (2), 5-10.
Stachowicz, M., Parafiniuk, J., Wilson, C., Coles, S., Woźniak, K. (2015) Applications of Hirshfeld surfaces to mineralogy: An example of alumohydrocalcite, and the classification of the dundasite group minerals. American Mineralogist: 100: 110-119.

Internet Links for AlumohydrocalciteHide

Localities for AlumohydrocalciteHide

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.
Argentina
Raúl Jorge Tauber Larry´s collection.
  • Tucumán
Hugo A. Peña (1970). Minerales y rocas de aplicación de la Provincia de Tucumán. Dirección Provincial de Minas. Tucumán.
      • Sierra de La Ramada
Raúl Jorge Tauber Larry´s collection.
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
Belgium
 
  • Liège Province
    • Visé
http://tw.strahlen.org/fotoatlas1/alumohydrocalcite_foto.html
  • Namur Province
    • Namur
Blondieau, M. et al. (2012): Minéralogie de la carrière de Beez, Province de Namur (Belgique). Le Règne Minéral, 104, 5-26.
France
 
  • Occitanie
    • Gard
      • Alzon
Patrice Queneau Collection Georges Favreau collection
      • Mercoirol
G. Favreau communication, AFM annual meeting, Moulins (Allier, France)October 2012
Germany
 
  • North Rhine-Westphalia
    • Bergisches Land
      • Bergisch Gladbach
        • Lückerath
Karl Kautz (1968) Ein Vorkommen von Alumohydrocalcit und Allophan bei Bergisch-Gladbach. N. Jahrbuch f. Mineralogie, Monatshefte: 350-358
    • 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
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
          • Madonna di Fucinaia (Madonna della Fucinaia) slag heaps
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.
  • Veneto
    • Vicenza Province
      • Valli del Pasubio
        • Staro
Daleffe, A., Boscardin, M. & Rocchetti, I (2012): Alumoidrocalcite di Fonte Virgiliana, Valli del Pasubio, Vicenza .
Japan
 
  • Honshu Island
    • Kanto Region
      • Gunma Prefecture
        • Fujioka
American Mineralogist (1986): 71, 1022-1027.
    • Kinki Region
      • Hyogo Prefecture
        • Yabu City
          • Oya-cho
Handbook of Mineralogy
      • Mie Prefecture
        • Taki-cho
Alfredo Petrov specimens
      • Osaka Prefecture
The Mineral Species of Japan (5th ed) Matsubara
  • Shikoku Island
    • Tokushima prefecture
      • Miyoshi City
Ohe Rikosya specimens (Kyoto)
Kyrgyzstan
 
  • Batken Oblast
Canadian Mineralogist: 43: 1511-1519.; Atali A. Agakhanov et al (2005) New Data on Minerals Vol 40 pp23-28
Pakistan
 
  • Khyber Pakhtunkhwa (North-West Frontier Province)
Handbook of Mineralogy
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
      • Nowa Ruda (Neurode)
        • Kolno (Kohlendorf; Groß Köllen)
Handbook of Mineralogy
Eligiusz Szełęg private collection; Stachowicz, M., Parafiniuk, J., Wilson, C., Coles, S. & Woźniak, K. (2015): Applications of Hirshfeld surfaces to mineralogy: An example of alumohydrocalcite, and the classification of the dundasite group minerals. American Mineralogist, 100, 110-119.
        • Przygórze
Hoehne K. 1953: Ein neues Vorkommen von chromhaltigen Alumohydrocalcit im niederschlesischen Bergbaugebiet. Neues Jb. Miner. Monatsh. H. 1
Russia (TL)
 
  • 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
    • Snina 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
Turkmenistan
 
  • Lebap Province
    • Chardzhou
Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
UK
 
  • England
    • Gloucestershire
      • Chipping Sodbury District
Alabaster, C. (1990) New occurrences of secondary aluminium minerals from the Bristol District. J. Russell Soc., 3 (2), 49-59.
      • Tytherington Quarries
BMS Database
    • North Yorkshire
Ryback G. "Alumohydrocalcite from Scarborough, North Yorkshire, and Weston Favell, Northamptonshire" Journal of the Russell Society Vol. 2 Part 1
    • Northamptonshire
Handbook of Mineralogy
    • 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)
USA
 
  • California
    • Santa Clara Co.
      • Diablo Range
        • Mount Hamilton
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
        • Orestimba District
          • Rooster Comb
Dunning, G. E. (2000): Chromian dawsonite and chromian alumohydrocalcite from Orestimba Creek, Stanislaus County, California. Mineralogical Record 31, 333-338.
  • Nevada
    • Nye Co.
      • Paradise Range
        • Gabbs District
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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