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Hydrocalumite

Big Photo

Ettringer Bellerberg Mt., Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany
© Elmar Lackner

Show Hydrocalumite Photos (8)
Formula:
Ca
 
2
Al(OH)
 
7
·2H
 
2
O
System:MonoclinicColour:Clourless to light green
Hardness:3
Name:In allusion to the composition, containing water (HYDRO-), CALcium, and ALUMinium.
This page provides mineralogical data about Hydrocalumite.

Classification of Hydrocalumite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/F.10-10
Nickel-Strunz 10th (pending) edition ID:4.FL.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
Dana 8th edition ID:6.4.4.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
Hey's CIM Ref.:7.4.14

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
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Type Occurrence of Hydrocalumite

Type Locality:Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK
Year of Discovery:1934

Physical Properties of Hydrocalumite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Clourless to light green
Hardness (Mohs):3
Cleavage:Perfect
{001}; a poor cleavage nclined at about 60° to {100}.
Density (measured):2.15 g/cm3
Density (calculated):2.15 g/cm3

Crystallography of Hydrocalumite

Crystal System:Monoclinic
Class (H-M):2 - Sphenoidal
Space Group:P21 (P1 1 21) [P21] {P1 21 1}
Cell Parameters:a = 9.6Å, b = 11.4Å, c = 16.84Å
β = 111°
Ratio:a:b:c = 0.842 : 1 : 1.477
Unit Cell Volume:V 1,720.56 ų (Calculated from Unit Cell)
Morphology:Massive.

Optical Data of Hydrocalumite

Type:Biaxial (-)
RI values: nα = 1.535 nβ = 1.553 nγ = 1.557
2V:Measured: 24° , Calculated: 50°
Maximum Birefringence:δ = 0.022

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

Chemical Properties of Hydrocalumite

Formula:
Ca
 
2
Al(OH)
 
7
·2H
 
2
O
Essential elements:Al, Ca, H, O
All elements listed in formula:Al, Ca, H, O

Relationship of Hydrocalumite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.FL.05Woodallite
Mg
 
6
Cr
 
2
(OH)
 
16
Cl
 
2
·4H
 
2
O
4.FL.05Iowaite
Mg
 
4
Fe(OH)
 
8
OCl·4H
 
2
O
4.FL.05Jamborite
(Ni
2+
 
,Ni
3+
 
,Co,Fe)(OH)
 
2
(OH,S,H
 
2
O)
4.FL.05Meixnerite
Mg
 
6
Al
 
2
(OH)
 
18
·4H
 
2
O
4.FL.05Muskoxite
Mg
 
7
Fe
 
4
O
 
13
·10H
 
2
O
4.FL.05Fougèrite
(Fe
2+
 
,Mg)
 
6
Fe
3+
2
(OH)
 
18
 · 4H
 
2
O
4.FL.15Kuzelite
Ca
 
4
Al
 
2.4
(OH)
 
12.8
(SO
 
4
)·6H
 
2
O
4.FL.20Aurorite
(Mn
2+
 
,Ag,Ca)Mn
4+
3
O
 
7
 · 3H
 
2
O
4.FL.20Chalcophanite
(Zn,Fe,Mn)Mn
 
3
O
 
7
·3H
 
2
O
4.FL.20Ernienickelite
NiMn
 
3
O
 
7
·3H
 
2
O
4.FL.20Jianshuiite
(Mg,Mn)Mn
 
3
O
 
7
·3H
 
2
O
4.FL.25Woodruffite
Zn(Mn
4+
 
,Mn
3+
 
)
 
5
O
 
10
·3½H
 
2
O
4.FL.30Asbolane
(Ni,Co)
 
2-x
Mn
4+
 
(O,OH)
 
4
 · nH
 
2
O
4.FL.35Buserite
Na
 
4
Mn
 
14
O
 
27
 ·21H
 
2
O
4.FL.40Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
·3H
 
2
O
4.FL.40Takanelite
(Mn,Ca)Mn
 
4
O
 
9
·H
 
2
O
4.FL.45Birnessite
(Na,Ca)
 
0.5
(Mn
4+
 
,Mn
3+
 
)
 
2
O
 
4
 · 1.5H
 
2
O
4.FL.55Cianciulliite
Mn(Mg,Mn)
 
2
Zn
 
2
(OH)
 
10
·2-4H
 
2
O
4.FL.60Jensenite
Cu
 
3
[TeO
 
6
] · 2H
 
2
O
4.FL.65Leisingite
Cu(Mg,Cu,Fe,Zn)
 
2
[TeO
 
6
] · 6H
 
2
O
4.FL.70Akdalaite
4Al
 
2
O
 
3
 · H
 
2
O
4.FL.75Cafetite
(Ca,Mg)(Fe,Al)
 
2
Ti
 
4
O
 
12
·4H
 
2
O
4.FL.80Mourite
UMo
 
5
O
 
12
(OH)
 
10
4.FL.85Deloryite
Cu
 
4
(UO
 
2
)(MoO
 
4
)
 
2
(OH)
 
6
Related Minerals - Hey's Index Grouping:
7.4.1Bromellite
BeO
7.4.2Behoite
Be(OH)
 
2
7.4.3Clinobehoite
Be(OH)
 
2
7.4.4Chrysoberyl
BeAl
 
2
O
 
4
7.4.5Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16
7.4.6Magnesiotaaffeite-6N’3S
(Mg,Fe,Zn)
 
2
Al
 
6
BeO
 
12
7.4.7Periclase
MgO
7.4.8Brucite
Mg(OH)
 
2
7.4.9Spinel
MgAl
 
2
O
 
4
7.4.10Meixnerite
Mg
 
6
Al
 
2
(OH)
 
18
·4H
 
2
O
7.4.11Lime
CaO
7.4.12Portlandite
Ca(OH)
 
2
7.4.13Mayenite
Ca
 
12
Al
 
14
O
 
33
7.4.15Marokite
CaMn
 
2
O
 
4
7.4.16Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
·3H
 
2
O
7.4.17Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
7.4.18Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
7.4.19Todorokite
(Mn,Mg,Ca,Ba,K,Na)
 
2
Mn
 
3
O
 
12
·3H
 
2
O

Other Names for Hydrocalumite

German names:
Hydrocalumit
Russian names:
Гидрокалюмит
Spanish names:
Hydrocalumita

Other Information

Thermal Behaviour:Strongly pyroelectric.
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 Hydrocalumite

Reference List:Tilley (1934), Mineralogical Magazine: 23: 607.

American Mineralogist (1935): 20: 316.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 667-668.

Neues Jahrbuch für Mineralogie, Monatshefte (1988): 462-475.

Internet Links for Hydrocalumite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hydrocalumite in the Natural History Museum (London) online catalogue
  • Hydrocalumite details from Handbook of Mineralogy (PDF)
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    Localities for Hydrocalumite

    Hide Locality List
    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.
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    (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
     
    • Styria
      • Bad Radkersburg
        • Klöch
    		Postl, W. & Bojar, H.-P. (2003)
    France
     
    • Auvergne
      • Puy-de-Dôme
        • Clermont-Ferrand
          • Ceyrat
    		H. Grünhagen and J. Mergoil, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 149-157.
    Germany
     
    • Bavaria
      • Franconia
        • Maroldsweisach
    		Wittern: "Mineralfundorte in Deutschland", 2001
    • Hesse
      • North Hesse
        • Richelsdorf District
          • Süss
            • Richelsdorf Smelter
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Lower Saxony
      • Harz Mts
        • Lautenthal
    		No reference listed
    • Rhineland-Palatinate
      • Eifel Mts
        • Daun
          • Hinterweiler
    		Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
          • Üdersdorf
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
        • Mayen
          • Ettringen
    		[Jasmund, K., Hentschel, G., Seltene Mineralparagenesen in den Kalksteineinschlüssen der Lava des Ettringer Bellerberges bei Mayen (Eifel), Beitr. Minera. Petr. 10, 296-314, 1964] [Lapis, 15 (5), 9-36]
        • Mendig
          • Bell
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
    Israel
     
    Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
    Italy
     
    • Latium
      • Viterbo Province
        • Montalto di Castro
          • Pietra Massa Locality
    		Passaglia, E. & Turconi, B. (1982): Silicati ed altri minerali di Montalto di Castro - VT. Rivista Mineralogica Italiana, 4/1982, 97-110.
    • Liguria
      • Genova Province
        • Genova
          • Varenna Valley
    		Rivista Mineralogica Italiana, 22 (3), 39-41.
    Japan
     
    • Kyushu Island
      • Oita prefecture
    		Alfredo Petrov specimen
    Russia
     
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Verkhnechegemskiy volcanic structure
    		A. E. Zadov data
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Larne
    		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: 590.
    USA
     
    • California
      • Riverside Co.
        • Crestmore
    		[micromounts@yahoogroups.com]
    Mineral and/or Locality
    Google
     
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