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Dachiardite-Ca

Big Photo

Cape Lookout, Tillamook Co., Oregon, USA
© Dick Dionne

Show Dachiardite-Ca Photos (2)
Formula:
(Ca,Na
 
2
,K
 
2
)
 
5
Al
 
10
Si
 
38
O
 
96
·25H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:4 - 4½
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.


Zeolite Group.

Classification of Dachiardite-Ca

IMA status:Approved
Strunz 8th edition ID:8/J.22-20
Nickel-Strunz 10th (pending) edition ID:9.GD.40

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
Dana 8th edition ID:77.1.24.2

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
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Type Occurrence of Dachiardite-Ca

Type Locality:La Speranza (Pisani's Quarry), San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy

Physical Properties of Dachiardite-Ca

Lustre:Vitreous
Hardness (Mohs):4 - 4½

Crystallography of Dachiardite-Ca

Crystal System:Monoclinic

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°
Maximum Birefringence:δ = 0.006

Chart 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

Formula:
(Ca,Na
 
2
,K
 
2
)
 
5
Al
 
10
Si
 
38
O
 
96
·25H
 
2
O
Essential elements:Al, Ca, H, O, Si
All elements listed in formula:Al, Ca, H, K, Na, O, Si

Relationship of Dachiardite-Ca to other Species

Related Minerals - Nickel-Strunz Grouping):
9.GD.05Gmelinite-Ca
(Ca,Na
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.05Gmelinite-K
(K
 
2
,Na
 
2
,Ca)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.05Gmelinite-Na
(Na
 
2
,Ca)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.10Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
9.GD.10Chabazite-Ca
(Ca,K
 
2
,Na
 
2
)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-K
(K
 
2
,Ca,Na
 
2
,Sr,Mg)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-Na
(Na
 
2
,K
 
2
,Ca,Sr,Mg)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-Sr
Sr
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.15Lévyne-Ca
(Ca,Na
 
2
,K
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.15Lévyne-Na
(Na
 
2
,Ca,K
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.20Bellbergite
(K,Ba,Sr)
 
2
Sr
 
2
Ca
 
2
(Ca,Na)
 
4
[Al
 
3
Si
 
3
O
 
12
]
 
6
 · 30H
 
2
O
9.GD.20Erionite-Ca
(Ca,K
 
2
,Na
 
2
)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.20Erionite-K
(K
 
2
,Ca,Na
 
2
)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.20Erionite-Na
(Na
 
2
,K
 
2
,Ca)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.25Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
·16H
 
2
O or near
9.GD.25Wenkite
(Ba,K)
 
4
(Ca,Na)
 
6
[(SO
 
4
)
 
3
|(Si,Al)
 
20
O
 
39
(OH)
 
2
] · 0.5H
 
2
O
9.GD.30Faujasite-Ca
(Ca,Na
 
2
,Mg)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.30Faujasite-Mg
(Mg,Na
 
2
,Ca)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.30Faujasite-Na
(Na
 
2
,Ca,Mg)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.35Maricopaite
Pb
 
7
Ca
 
2
(Si,Al)
 
48
O
 
100
·32H
 
2
O
9.GD.35Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
·7H
 
2
O
9.GD.40Dachiardite-Na
(Na
 
2
,Ca,K
 
2
)
 
5
Al
 
10
Si
 
38
O
 
96
·25H
 
2
O
9.GD.45Epistilbite
CaAl
 
2
Si
 
6
O
 
16
·5H
 
2
O
9.GD.50Ferrierite-K
(K
 
2
,Na
 
2
,Mg,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.50Ferrierite-Mg
(Mg,Na
 
2
,K
 
2
,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.50Ferrierite-Na
(Na
 
2
,K
 
2
,Mg,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.55Bikitaite
LiAlSi
 
2
O
 
6
·H
 
2
O

Other Names for Dachiardite-Ca

Russian names:
Дакиардит-Ca

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 Dachiardite-Ca

Reference List:Periodico di Mineralogia: 29: 103-107.

Zeitschrift für Kristallographie: 166: 63-71.

Internet Links for Dachiardite-Ca

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    Localities for Dachiardite-Ca

    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.
    Bulgaria
     
    • Kardzali (Kurdzhali; Kărdžali; Kurdjali) Oblast
      • Rhodope Mts
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • 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.
    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
    		Eur. J. Mineral. , 1990, 2, pp. 187-193.
    • Kyushu Island
      • 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
    Mineral and/or Locality
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