sábado, 30 de agosto de 2014

Sveite, Nuevo mineral descubierto en Venezuela

Big Photo Cueva del Cerro Autana (Autana Cave), Amazonas, Venezuela
© Rick Turner, 2009
Fuente: http://www.mindat.org/min-3838.html
Formula:
KAl
7
(NO
3
)
4
(OH)
16
Cl
2
· 8H
2
O
System:MonoclinicColour:White
Name:From SVE, the acronym for the Sociedad Venezolana de Espeleogia, whose members collected the original specimen.
This page provides mineralogical data about Sveite.

Classification of Sveite

IMA status:Approved 1980
Strunz 8th edition ID:5/A.04-10
Nickel-Strunz 10th (pending) edition ID:5.ND.20

5 : CARBONATES (NITRATES)
N : NITRATES
D : With OH (etc.) and H2O
Dana 7th edition ID:19.2.3.1
Dana 8th edition ID:19.1.3.1

19 : NITRATES CONTAINING HYDROXYL OR HALOGEN
1 : Anhydrous Nitrates Containing Hydroxyl or Halogen
Hey's CIM Ref.:13.8

13 : Nitrates
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Type Occurrence of Sveite

Type Locality:Cueva del Cerro Autana (Autana Cave), Amazonas, Venezuela
Year of Discovery:1980

Physical Properties of Sveite

Colour:White

Crystallography of Sveite

Crystal System:Monoclinic
Cell Parameters:a = 10.89Å, b = 13.04Å, c = 30.71Å
β = 92.1°
Ratio:a:b:c = 0.835 : 1 : 2.355
Unit Cell Volume:V 4,358.06 ų (Calculated from Unit Cell)

Optical Data of Sveite

Type:Biaxial (+)
RI values:nα = 1.501 nβ = 1.503 nγ = 1.535
2V:Calculated: 30°
Maximum Birefringence:δ = 0.034

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

Chemical Properties of Sveite

Formula:
KAl
7
(NO
3
)
4
(OH)
16
Cl
2
· 8H
2
O
Simplified for copy/paste:KAl7(NO3)4(OH)16Cl2·8H2O
Essential elements:Al, Cl, H, K, N, O
All elements listed in formula:Al, Cl, H, K, N, O

Relationship of Sveite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.ND.05Likasite
Cu
3
(NO
3
)(OH)
5
· 2H
2
O
5.ND.10Mbobomkulite
(Ni,Cu)Al
4
((NO
3
)
2
,SO
4
)(OH)
12
· 3H
2
O
5.ND.15Hydrombobomkulite
(Ni,Cu)Al
4
((NO
3
)
2
,SO
4
)(OH)
12
· 13-14H
2
O
Related Minerals - Hey's Index Grouping:

- +
13.1Nitratine
NaNO
3
13.2Niter
KNO
3
13.3Gerhardtite
Cu
2
(NO
3
)(OH)
3
13.4Nitromagnesite
Mg(NO
3
)
2
· 6H
2
O
13.5Nitrocalcite
Ca(NO
3
)
2
· 4H
2
O
13.6Nitrobarite
Ba(NO
3
)
2
13.7Buttgenbachite
Cu
19
(NO
3
)
2
(OH)
32
Cl
4
· 2H
2
O
13.9Darapskite
Na
3
(SO
4
)(NO
3
) · H
2
O
13.10Humberstonite
Na
7
K
3
Mg
2
(SO
4
)
6
(NO
3
)
2
· 6H
2
O
13.11Mbobomkulite
(Ni,Cu)Al
4
((NO
3
)
2
,SO
4
)(OH)
12
· 3H
2
O
13.12Hydrombobomkulite
(Ni,Cu)Al
4
((NO
3
)
2
,SO
4
)(OH)
12
· 13-14H
2
O
13.13Nickelalumite
(Ni,Cu)Al
4
(SO
4
,(NO
3
)
2
)(OH)
12
· 3H
2
O

Other Names for Sveite

Synonyms:
IMA1980-005
Other Languages:
German:Sveit
Spanish:Sveita

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 Sveite

Reference List:

- +
Bol. Soc. Venezolano Espeleologia (1980), 21, 13-16.

American Mineralogist (1982): 67: 1076.

Transactions of the Geological Society of South Africa: 83: 239-241.

Internet Links for Sveite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sveite details from Handbook of Mineralogy (PDF)

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    • Localities for Sveite

    Hide Locality List
    (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.
    USA
    • California
    • San Joaquin Co.
    		OCCURRENCE AND PROPERTIES OF SVEITE IN THE NORTHEASTERN SAN JOAQUIN VALLEY, CALIFORNIA-- R. C. Graham, J. O. Ervin, and W. M. Graham in Clays and Clay Minerals, Vol. 36, No. 6, 580-583, 1988.
    Venezuela
    • Amazonas
    		J.E.J. Martini, (1980) Sveite, a new mineral from Autana Cave, Territorio Federal Amazonas, Venezuela Trans. Geol. Soc. S. Africa, 83, 239-241.
    Publicado por en No hay comentarios:
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    miércoles, 21 de mayo de 2014

    Resultados del material biológico de herpetofauna colectada en las expediciones a los Tepuys de la Guayana Venezolana

    Zona de estudio
    Situación de la localidades
    Stefania ginesi Forma endémica del Macizo Chimanta Tepuy
    Phenacosaurus carlostoddi Nueva especie de lagarto endémico del Macizo Chimanta tepuy
    Fuente https://www.academia.edu/7109361/Resultados_del_material_biologico_de_Herpetofauna Colectado_en_Expediciones_a_Cavernas_en_Tepuys_de_la_Guayana_Venezolanaa  
    "Resultados del material biológico de herpetofauna colectada en las expediciones a los Tepuys de la Guayana Venezolana"
    Por Carlos Galan 2000
    Publicado por en No hay comentarios:
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    domingo, 11 de mayo de 2014

    Diversidad de la fauna cavernícola de los karts en caliza del Norte de Venezuela

    Fuente: Ver bibliografía completa en: http://espeleologiabibliografia.blogspot.com/2013_10_01_archive.HTML
    Carlos GALÁN, Francisco F. HERRERA. Ascanio RINCÓN. Miguel LEIS
    "Diversidad de la fauna cavernícola de los karts en caliza del Norte de Venezuela"
    Cave fauna diversity in Northern Venezuela limestone karsts
    (2009) 31 p.
    Instituto Venezolano de Investigaciones Científicas. Sociedad de Ciencias Aranzadi. Sociedad Venezolana de Espeleología.
    Publicado por en No hay comentarios:
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    Fuente: Ver bibliografía completa en:  http://espeleologiabibliografia.blogspot.com/2013_10_01_archive.HTML
    Carlos GALÁN. Francisco F. HERRERA. Ascanio RINCÓN. Miguel LEIS
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    Cueva Grande de Anton Göering: Ecology, Biomass and Biodiversity
    (2009) 47 p.
    Instituto Venezolano de Investigaciones Científicas. Sociedad de Ciencias Aranzadi. Sociedad Venezolana de Espeleología
    Publicado por en No hay comentarios:
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