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Direnzoite

Formula:
NaK
 
6
MgCa
 
2
(Al
 
13
Si
 
47
O
 
120
)·36H
 
2
O
System:OrthorhombicColour:colorless
Hardness:4½
Name:Named for Dr Francesco Di Renzo (1954- ), Research Director at the Laboratoire de Materiaux, Catalytiques et Catalyse en Chimie Organique, Ecole Nationale Superieure de Chimie de Montpellier, France.
This page provides mineralogical data about Direnzoite.

Classification of Direnzoite

IMA status:Approved 2007
Strunz 9th edition ID:9.G0.
Nickel-Strunz 10th (pending) edition ID:9.GF.55

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
F : Other Rare Zeolites
Dana 7th edition ID:77.1.44.1
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Type Occurrence of Direnzoite

Type Locality:Mt Peylenc, Saint-Pierre-Eynac, Saint-Julien-Chapteuil, Haute-Loire, Auvergne, France
General Appearance of Type Material:spherical aggregates of fibrous micr-crystals
Place of Conservation of Type Material:not given in article
Geological Setting of type material:Found in cavities of a xenolitic rock

Physical Properties of Direnzoite

Lustre:Vitreous, Silky
Diaphaneity (Transparency):Transparent, Translucent
Colour:colorless
Streak:white
Hardness (Mohs):4½
Hardness Data:Estimated
Comment:estimated as mean value between that of mordenite & mazzite
Tenacity:Brittle
Cleavage:Distinct/Good
along the [010]
Fracture:Splintery
Density (measured):2.12(3) g/cm3
Density (calculated):2.080(5) g/cm3

Crystallography of Direnzoite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pmmn {P21/m 21/m 2/n}
Cell Parameters:a = 7.57887(18) Å, b = 18.20098(57) Å, c = 26.15387(83) Å
Ratio:a:b:c = 0.416 : 1 : 1.437
Unit Cell Volume:V 3607.74 ų
X-Ray Powder Diffraction:
d-spacingIntensity
9.077 (60)
7.846 (41)
4.234 (44)
3.549 (47)
3.484 (71)
3.269 (55)
3.182 (100)

Chemical Properties of Direnzoite

Formula:
NaK
 
6
MgCa
 
2
(Al
 
13
Si
 
47
O
 
120
)·36H
 
2
O
All elements listed in formula:Al, Ca, H, K, Mg, Na, O, Si

Relationship of Direnzoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GF.05Terranovaite
(Na,Ca)
 
8
(Si
 
68
Al
 
12
)O
 
160
·29H
 
2
O
9.GF.10Gottardiite
Na
 
3
Mg
 
3
Ca
 
5
Al
 
19
Si
 
117
O
 
272
·93H
 
2
O
9.GF.15Lovdarite
(Na,K,Ca)
 
4
(Be,Al)
 
2
Si
 
6
O
 
16
·4H
 
2
O
9.GF.20Gaultite
Na
 
4
Zn
 
2
Si
 
7
O
 
18
·5H
 
2
O
9.GF.25Chiavennite
CaMnBe
 
2
Si
 
5
O
 
13
(OH)
 
2
·2H
 
2
O
9.GF.30Tschernichite
(Ca,Na
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 4-8H
 
2
O
9.GF.35Mutinaite
Na
 
3
Ca
 
4
Si
 
85
Al
 
11
O
 
192
·60H
 
2
O
9.GF.40Tschörtnerite
Ca
 
4
(Ca,Sr,K,Ba)
 
3
Cu
 
3
[(OH)
 
2
|Al
 
3
Si
 
3
O
 
12
]
 
4
 · nH
 
2
O
9.GF.50Thornasite
(Na,K)Th,Si
 
11
(O,OH,F,Cl)
 
25
·8H
 
2
O

Other Names for Direnzoite

Synonyms:
IMA2006-044
Other Languages:

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 Direnzoite

Reference List:Galli, E. and A.F. Gualtieri: "Direnzoite, a new zeolite from the Massif Central (France): Description and crystal structure": American Mineralogist 93, 95-102 (2008)

Internet Links for Direnzoite

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    Localities for Direnzoite

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    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.
    France
     
    • Auvergne
      • Haute-Loire
        • Saint-Julien-Chapteuil
          • Saint-Pierre-Eynac
    		Galli E, Gualtieri AF (2008) Direnzoite, [NaK6MgCa2(Al13Si47O120)·36H2O], a new zeolite from Massif Central (France): Description and crystal structure. American Mineralogist 93: 95–102
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