Magadiite
http://dbpedia.org/resource/Magadiite an entity of type: Thing
La magadiïta és un mineral de la classe dels silicats. Rep el nom del llac Magadi, a Kenya, la seva localitat tipus.
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Magadiita silikato motako minerala da.
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Magadiite is a hydrous sodium silicate mineral (NaSi7O13(OH)3·4(H2O)) which precipitates from alkali brines as an evaporite phase. It forms as soft (Mohs hardness of 2) white powdery monoclinic crystal masses. The mineral is unstable and decomposes during diagenesis leaving a distinctive variety of chert (Magadi-type chert). The mineral was first described by Hans P. Eugster in 1967 for an occurrence in Lake Magadi, Kenya, and is also found at Olduvai Gorge, Tanzania. It is also reported from alkalic intrusive syenites as in Mont Saint-Hilaire, Canada.
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La magadiite è un minerale.
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Magadiïta
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Magadiita
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Magadiite
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Magadiite
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Magadiite
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Magadiite
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18797238
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1071635153
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White
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9
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Puttylike
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a = 7.22 Å, b = 15.70 Å,
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c = 6.91 Å; β = 97.27°; Z=1
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Magadiite. Collected in 1990 from Lake Magadi, Kajiado County, Kenya.
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White
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2.25
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C2/m
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Unknown space group
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La magadiïta és un mineral de la classe dels silicats. Rep el nom del llac Magadi, a Kenya, la seva localitat tipus.
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Magadiita silikato motako minerala da.
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Magadiite is a hydrous sodium silicate mineral (NaSi7O13(OH)3·4(H2O)) which precipitates from alkali brines as an evaporite phase. It forms as soft (Mohs hardness of 2) white powdery monoclinic crystal masses. The mineral is unstable and decomposes during diagenesis leaving a distinctive variety of chert (Magadi-type chert). The mineral was first described by Hans P. Eugster in 1967 for an occurrence in Lake Magadi, Kenya, and is also found at Olduvai Gorge, Tanzania. It is also reported from alkalic intrusive syenites as in Mont Saint-Hilaire, Canada.
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La magadiite è un minerale.
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Translucent to opaque
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Yellow-white under both long and short wave
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NaSi7O133·4
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Minute platy crystals; spherulitic aggregates; powdery
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Mgd
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Vitreous - dull
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2
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Biaxial
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nα = 1.470
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3547