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Dachiardite-Ca

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Antonio D'Achiardi
Formula:
Ca2(Si20Al4)O48 · 13H2O
System:
Monoclinic
Lustre:
Vitreous
Hardness:
4 - 4½
Member of:
Name:
Named after Antonio D'Achiardi (1839–1902), Professor of Mineralogy, Universitá di Pisa, Italy, who first described the mineral discovered by his son in a granitic pegmatite. Renamed in 1997 as Dachiardite-Ca by IMA.
Zeolite Group.
The Ca analogue of Dachiardite-Na.


Classification of Dachiardite-Ca

Approved, 'Grandfathered' (first described prior to 1959)
Notes:
Renamed by the IMA
Approval History:
Renamed Dachiardite-Ca in 1997 (IMA special procedure)
9.GD.40

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
77.1.24.2

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites

Physical Properties of Dachiardite-Ca

Vitreous
Hardness (Mohs):
4 - 4½

Optical Data of Dachiardite-Ca

Type:
Biaxial (+)
RI values:
nα = 1.488 - 1.494 nβ = 1.490 - 1.496 nγ = 1.494 - 1.499
2V:
Measured: 58° to 73°, Calculated: 72° to 80°
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemical Properties of Dachiardite-Ca

IMA Formula:
Ca2(Si20Al4)O48 · 13H2O
Elements listed in formula:

Crystallography of Dachiardite-Ca

Crystal System:
Monoclinic

Type Occurrence of Dachiardite-Ca

Relationship of Dachiardite-Ca to other Species

Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
Ammonioleucite(NH4,K)(AlSi2O6)
AnalcimeNa(AlSi2O6) · H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
BikitaiteLiAlSi2O6 · H2O
BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Levyne SubgroupA subgroup of the Zeolite Group.
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
ClinoptiloliteNote on the distinguishing differences between clinoptilolite and heulandite (hhttp://rruff.
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-KK4(Si20Al4O48)·13H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
ErioniteThis name now refers to a group of related minerals.
Faujasite SubgroupA subgroup of the Zeolite Group.
FerrieriteZeolite Group.
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2O
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
GaultiteNa4Zn2Si7O18 · 5H2O
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
GmeliniteIn 1997, gmelinite was split into Gmelinite-Ca, Gmelinite-Na and Gmelinite-K.
GobbinsiteNa5(Si11Al5)O32 · 11H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
HeulanditeNote on the distinguishing differences between heulandite and clinoptilolite (http://rruff.
HsianghualiteCa3Li2(Be3Si3O12)F2
KirchhoffiteCs(BSi2O6)
LaumontiteCaAl2Si4O12 · 4H2O
LovdariteK2Na6Be4Si14O36 · 9H2O
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
Mazzite-NaNa8[Al4Si14O36]2 · 30H2O
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
Natrolite SubgroupA subgroup of the Zeolite Group.
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
Paulingite-Ca(Ca,K,Na,Ba,◻)10 (Si, Al)42O84•34H2O
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
PhillipsiteZeolite Group.
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
StelleriteCa4(Si28Al8)O72 · 28H2O
Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2O
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2O
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2O
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2O
WairakiteCa(Al2Si4O12) · 2H2O
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
WillhendersoniteKCa[Al3Si3O12] · 5H2O
YugawaraliteCaAl2Si6O16 · 4H2O
9.GD.05Gmelinite-CaCa2(Si8Al4)O24 · 11H2O
9.GD.05Gmelinite-KK4(Si8Al4)O24 · 11H2O
9.GD.05Gmelinite-NaNa4(Si8Al4)O24 · 11H2O
9.GD.10WillhendersoniteKCa(Si3Al3)O12 · 5H2O
9.GD.10Chabazite-CaCa2Al4Si8O24 · 13H2O
9.GD.10Chabazite-K(K2NaCa0.5)Al4Si8O24 · 11H2O
9.GD.10Chabazite-Na(Na3K)Al4Si8O24 · 11H2O
9.GD.10Chabazite-Sr(Sr,Ca)2Al4Si8O24 · 11H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)Al3Si9O24 · 10H2O
9.GD.15Lévyne-CaCa3(Si12Al6)O36 · 18H2O
9.GD.15Lévyne-NaNa6(Si12Al6)O36 · 18H2O
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4(Si,Al)36O72 · 30H2O
9.GD.20Erionite-CaCa5(Si26Al10O72) · 30H2O
9.GD.20Erionite-KK10(Si26Al10O72) · 30H2O
9.GD.20Erionite-NaNa10(Si26Al10O72) · 30H2O
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2O
9.GD.25WenkiteBa4Ca6(Si,Al)20O41(OH)2(SO4)3 · H2O
9.GD.30Faujasite-Ca(Ca,Na,Mg)2(Si,Al)12O24 · 15H2O
9.GD.30Faujasite-Mg(Mg,Na,K,Ca)2(Si,Al)12O24 · 15H2O
9.GD.30Faujasite-Na(Na,Ca,Mg)2(Si,Al)12O24 · 15H2O
9.GD.35MaricopaiteCa2Pb7(Si36Al12)O99 · n(H2O,OH)
9.GD.35Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
9.GD.40Dachiardite-NaNa4(Si20Al4)O48 · 13H2O
9.GD.45EpistilbiteCa3(Si18Al6)O48 · 16H2O
9.GD.50Ferrierite-K(K,Na)5(Si31Al5)O72 · 18H2O
9.GD.50Ferrierite-Mg[Mg2(K,Na)2Ca0.5](Si29Al7)O72 · 18H2O
9.GD.50Ferrierite-Na(Na,K)5(Si31Al5)O72 · 18H2O
9.GD.55BikitaiteLiAlSi2O6 · H2O

Other Names for Dachiardite-Ca

Name in Other Languages:

Other Information

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 Dachiardite-Ca

Reference List:
D'Achiardi, G. (1906) Zeoliti del filone della speranza presso S. Piero in Campo (Elba). Atti della Societa Toscana di Scienze Naturali. Processi Verbali: 22: 150-165.

Periodico di Mineralogia: 29: 103-107.

Vezzalini, G. (1984) A refinement of Elba dachiardite: Opposite acentric domains simulating a centric structure. Zeitschrift für Kristallographie: 166: 63-71

Quartieri, S., Vezzalini, G. and Alberti, A. (1990): Dachiardite from Hokiya-dake: evidence of a new topology, Eur. Jour. Mineral., 2, 187-193.

Coombs, D. S., Alberti A., Armbruster, T., Artioli, G., Colella, C., Galli, E., Grice, J. D., Liebau, F., Mandarino, J. A., Minato, H., Nickel, E. H., Passaglia, E., Peacor, D. R, Quartieri, S., Rinaldi, R., Ross, M., Sheppard, R. A., Tillmanns E., Vezzalini G., (1997) Recommended nomenclature for zeolite minerals: report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist: 35: 1571-1606

Jambor J L, Grew E S, Roberts A C (1998) New mineral names. American Mineralogist: 83: 1347-1352

Internet Links for Dachiardite-Ca

mindat.org URL:
https://www.mindat.org/min-6895.html
Please feel free to link to this page.

Localities for Dachiardite-Ca

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Bulgaria
 
  • Kardzhali Oblast (Kurdzhali; Kărdžali; Kurdjali)
    • Momchilgrad Obshtina
Encheva, S., Petrov, P., Chukanov, N., Pekov, I., Енчева, С., Петко, П., ... & Пеков, И. Dachiardite-K from the area of Austa village, Momchilgrad municipality, Eastern Rhodopes–a new mineral species of zeolite group Дакиардит-K от района на с. Ауста, община Момчилград, Източни Родопи–нов минерален вид от групата на зеолитите.
    • Rhodope Mts
Gellens, L., Price, G. D., & Smith, J. V. (1982). The structural relation between svetlozarite and dachiardite. Mineralogical Magazine, 45(337), 157-161.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Liberec Region
      • Proseč pod Ještědem
Pauliš P. et al.: Dachiardit-Ca z Proseče pod Ještědem u Liberce. Zprávy o geologických výzkumech v roce 2007, Mineralogie, petrologie a geochemie, 179-181.
    • Pardubice Region
      • Svitavy (Zwittau)
Rychlý, R., Veselovský, F., Ondruš, P.: Dachiardite from Svojanov, Czech Republic. Scripta Fac. Sci. Nat. Univ. Masaryk. Brun, Geol., 1996, vol. 26, p. 42 - 43.
    • Ústí Region
      • Děčín (Tetschen)
        • Krásná Lípa
P.Pauliš,L.Hrůzek,O.Janeček,J.Sejkora,R.Malíková,F.Fedyuk(2014)Dachiardite-Ca and associated mineralization from Doubice-Vápenka near Krásná Lípa(Czech Republic).Bull.Min.-Pet.od.Národní muzeum Praha 22,1
Hungary
 
  • Pest Co.
    • Börzsöny Mts
      • Szob
Szakáll-Gatter-Szendrei: Mineral species of Hungary 2005
Italy
 
  • Tuscany
    • Livorno Province
      • Elba Island
        • Campo nell'Elba
G. D'Achiardi (1905) - Zeolite probabilmente nuova dell'isola d'Elba - Atti Soc. Tosc. Sc. Nat., P.V., 14: 150-156.
Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp. ; Coombs, D.S., Alberti, A., Armbruster, T., Artioli, G., Colella, C., Galli, E., Grice, J.D., Liebau, F., Mandarino, J.A., Minato, H., Nickel, E.H., Passaglia, E., Peacor, D.R., Quartieri, S., Rinaldi, R., Ross, M., Sheppard, R.A., Tillmanns, E., Vezzalini, G. (1997): Recommended nomenclature for zeolites minerals - Report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. [Review]. Canadian Mineralogist, 35, 1571-1606.
Japan
 
  • Honshu Island
    • Chubu region
      • Nagano Prefecture
        • Nagano City
          • Matsushiro
            • Toyosaka
Eur. J. Mineral. , 1990, 2, pp. 187-193.
  • Kyushu Region
    • Kagoshima Prefecture
Eur. J. Mineral. , 1990, 2, pp. 187-193.
USA
 
  • Oregon
    • Tillamook Co.
Micro Probe Volume IX Number 3
  • Washington
    • Wahkiakum Co.
      • Altoona
Micro Probe Volume IX Number 3 Spring 2001
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