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Dachiardite

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System:MonoclinicColour:Colourless
Hardness:4 - 4½
Name:Named after A. D'Achiardi
Synonym of:Dachiardite-Ca, Dachiardite-Na


Zeolite Group.
Name for unspecified member within the series between dachiardite-Ca and dachiardite-Na.

Classification of Dachiardite

Dana 8th edition ID:77.1.6.4

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
Hey's CIM Ref.:16.10.22

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
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Physical Properties of Dachiardite

Colour:Colourless
Hardness (Mohs):4 - 4½

Crystallography of Dachiardite

Crystal System:Monoclinic
Cell Parameters:a = 18.03Å, b = 7.52Å, c = 10.2Å
β = 104.46°
Ratio:a:b:c = 2.398 : 1 : 1.356
Unit Cell Volume:V 1,339.16 ų (Calculated from Unit Cell)

Optical Data of Dachiardite

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

Relationship of Dachiardite to other Species

Related Minerals - Hey's Index Grouping:

- +
16.10.1Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
16.10.2Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
16.10.4Thomsonite-Ca
NaCa
 
2
[Al
 
5
Si
 
5
O
 
20
] · 6H
 
2
O
16.10.5Gonnardite
(Na,Ca)
 
2
(Si,Al)
 
5
O
 
10
· 3H
 
2
O
16.10.6Mesolite
Na
 
2
Ca
 
2
Si
 
9
Al
 
6
O
 
30
· 8H
 
2
O
16.10.7Faujasite
16.10.8Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
· 27H
 
2
O
16.10.9Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
· 70H
 
2
O
16.10.10Herschelite
16.10.11Phillipsite
16.10.12Fedorite
(Na,K)
 
2-3
(Ca
 
4
Na
 
3
)Si
 
16
O
 
38
F
 
2
· 3.5H
 
2
O
16.10.13Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
16.10.14Barrerite
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
16.10.15Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
· 7H
 
2
O
16.10.16Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
· 6H
 
2
O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.19Heulandite
16.10.20Gobbinsite
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
· 12H
 
2
O
16.10.21Stilbite
16.10.23Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
· 16H
 
2
O or near
16.10.24Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
· 15H
 
2
O
16.10.25Erionite
16.10.26Paulingite
16.10.27Sodium Dachiardite
(Na
 
2
,Ca,K
 
2
)
 
4-5
Al
 
8
Si
 
40
O
 
96
· 26H
 
2
O
16.10.28Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
· 28H
 
2
O or near
16.10.29Roggianite
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
· 2.5H
 
2
O

Other Names for Dachiardite

Synonyms:
AchiarditeZeolite Mimetica
Other Languages:
German:Achiardit
D'Achiardit
Dachiardit
Russian:Дакиардит
Spanish:Achiardita
Dachiardita

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

Reference List:

- +
Bonatti S., Gottardi G. (1960) Dati ottici e strutturali sulla dachiardite. Periodico di Mineralogia, 103-108.

Gottardi G. (1960) Sul dimorfismo mordenite-dachiardite. Periodico di Mineralogia, 183-191.

Galli E. (1965) Lo spettro di polvere della dachiardite. Periodico di Mineralogia, 129-135.

Internet Links for Dachiardite

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  • Localities for Dachiardite

    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.
    (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
      • Klagenfurt
        • Gundersdorf
    [Dachiardite-Na] G. Niedermayr: Carinthia II 187./107.:172 (1997)
    • Styria
      • Bruck an der Mur
        • Kapfenberg
          • Tanzenberg
    [Dachiardite-Na] ostl, W. & Walter, F. (1983); Postl, W. et al. (1985); Exel, R. (1993)
      • Graz
        • Wildon
          • Weitendorf
    R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Bulgaria
     
    • Kardzhali Oblast (Kurdzhali; Kărdžali; Kurdjali)
      • Rhodope Mtn
    [Dachiardite-Ca]
    Canada
     
    • Québec
      • Montréal
    [Dachiardite-Na] BONARDI, M., ROBERTS, A.C., and SABINA, A.P. (1981) Sodium-rich dachiardite from the Francon quarry, Montreal Island, Quebec. Canadian Mineralogist, 19, 285-289. TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. The Mineralogical Record, 37, 5-60.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Pardubice Region
        • Svitavy (Zwittau)
    [Dachiardite-Ca] 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.
    French Southern and Antarctic Lands
     
    • Kerguelen Islands
    Giret, A., Verdier, O. & Nativel, P. (1992). The zeolitisation of Kerguelen Islands, Southern Indian Ocean. In: Yoshida, Y., et al. (eds) Recent Progress in Antarctic Earth Science, Tokyo: Terra Publishing 32, 1–36. Co., pp. 457–463.
    Germany
     
    • Bavaria
      • Franconia
        • Maroldsweisach
    [Dachiardite-Na] Wittern: "Mineralfundorte in Deutschland", 2001
    • Hesse
      • Vogelsberg
        • Ortenberg
    Hungary
     
    • Borsod-Abaúj-Zemplén Co.
      • Zemplén Mtns (Tokaj Mtns)
        • Regéc
    Szakáll & Jánosi: Minerals of Hungary, 1995
    • Heves Co.
    Van King
    • Pest Co.
      • Börzsöny Mtns
        • Szob
    [Dachiardite-Ca] Szakáll-Gatter-Szendrei: Mineral species of Hungary 2005
    Italy
     
    • Trentino-Alto Adige
      • Bolzano Province (South Tyrol)
        • Gardena Valley (Gröden Valley)
          • Siusi Alp (Seis Alp)
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
      • Trento Province
        • Fassa Valley
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
          • Duron Valley
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    [Dachiardite-Na] Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    • Tuscany
      • Livorno Province
        • Elba Island
          • Campo nell'Elba
    [Dachiardite-Ca] G. D'Achiardi (1905) - Zeolite probabilmente nuova dell'isola d'Elba - Atti Soc. Tosc. Sc. Nat., P.V., 14: 150-156.
    [Dachiardite-Ca] Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
    [Dachiardite-Ca] 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
    [Dachiardite-Ca] Eur. J. Mineral. , 1990, 2, pp. 187-193.
        • Niigata Prefecture
          • Aga-machi (Higashi-Kanbara-gun)
            • Tsugawa
    [Dachiardite-Na] Yoshimura, T. & Wakabayashi, S. (1977): Na-dachiardite and associated high-silica zeolites from Tsugawa, northeast Japan. Science Reports of Niigata University, Ser. E, Geology and Mineralogy, 4, 49-65.
        • Shizuoka Prefecture
          • Kawazu
    Yamada, T. et al (1994) Suisyou, 8, #1, 12-16.
    • Kyushu Region
      • Kagoshima Prefecture
    [Dachiardite-Ca] Eur. J. Mineral. , 1990, 2, pp. 187-193.
    • Tokyo Prefecture
      • Ogasawara Islands
        • Chichijima Group
          • Chichi Island (Chichijima)
    Mineralogical Journal Vol. 11 (1982) , No. 1 pp1-14
    Mineralogical Journal Vol. 11 (1982) , No. 1 pp1-14
    New Zealand
     
    • South Island
      • Canterbury
    Jesse Crawford specimen
    Ukraine
     
    • Crimea Oblast'
    [Dachiardite-Na] World of Stones v.9
    [Dachiardite-Na] Tischenko A. data
    USA
     
    • California
      • Los Angeles Co.
    Mineral News v.14 no.9
          • Agoura Hills
    Houseley, Bob (2013)
    www.mineralsocal.org
      • Riverside Co.
        • Mule Mts
          • Wiley Well District
    www.mineralsocal.org/scfm/california/r.htm
    • Oregon
      • Deschutes Co.
        • East Lake
    Mineralogy of 10 Geothermal boreholes drilled in and around the Newberry Caldera U.S. Geological Survey Professional Paper, Issue 1578 By Keith E. Bargar, Terry E. C. Keith 1999
      • Lincoln Co.
        • Agate Beach
    [Dachiardite-Na] Micro Probe Vol. 9 No 3, spring 2001; Tschernich, R. (1992): Zeolites of the World, 116
      • Tillamook Co.
    Micro Probe (1990) Volume VII Number 1 pp 9-15
    • Washington
      • Wahkiakum Co.
        • Altoona
    [Dachiardite-Ca] Micro Probe Volume IX Number 3 Spring 2001
    • Wyoming
      • Park Co.
    [Dachiardite-Na] Tschernich, 1992. Zeolites of the World
    [Dachiardite-Na] Bargar, K.E.; Beeson, M.H. & Keith, T.E.C. (1981): Zeolites in Yellowstone National Park. Mineralogical Record 12, 29-38
    [Dachiardite-Na] Bargar, K.E.; Beeson, M.H. & Keith, T.E.C. (1981): Zeolites in Yellowstone National Park. Mineralogical Record 12, 29-38
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