| 释义 |
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{{Infobox mineral
| name = Metavivianite
| category = Phosphate mineral
| image = Metavivianite Pavel-Kartashov.jpg
| caption = A 6x4 cm specimen of paramorphosed olive-green to green Metavivianite after oxidized vivianite. From Kerchenskoe deposit, Crimea Oblast, Ukraine. Photo and collection specimen by Pavel Kartashov.
| formula = {{Chem|Fe|3+|2|(PO|4|)|2|(O|H)|2|·6H|2|O}}
| molweight = 443.734 g/mol
| strunz = 8.DC.25 (10 ed)
7/C.14-20 (8 ed)
| dana = 40.11.9.4
| system = Triclinic
| class = Pinacoidal (1)
| symmetry = P1
| unit cell = a = 7.989(1) Å, b = 9.321(2) Å
c = 4.629(1) Å; α = 97.34(1)°; β = 95.96(1)°; γ = 108.59(2)°
| color = Dark blue to blue-black; Dark green to green-black
| habit = Bladed crystals, often with irregular acute multiple terminations.
| twinning = {110}
| cleavage = Perfect on {110}
| tenacity = Sectile
| mohs = 1.5-2
| luster = Sub-vitreous, Resinous, Greasy, Dull
| streak = Blue or greenish blue
| diaphaneity = translucent
| gravity = 2.69
| density =
| polish =
| opticalprop = Biaxial (+)
| refractive = nα = 1.600 - 3.000, nβ = 1.640 - 3.000, nγ = 1.685 - 3.000
| birefringence = δ = 0.050 - 0.085
| pleochroism = Visible; X = blue to blue-green; Y,Z = yellow-green
| 2V = Measured: 85° (5), Calculated: 90°
| dispersion = Very weak
| extinction =
| length fast/slow =
| fluorescence= Not fluorescent
| absorption =
| melt =
| fusibility =
| diagnostic =
| solubility =
| other =
| alteration =
| references =
}}Metavivianite ({{Chem|Fe|3+|2|(PO|4|)|2|(O|H)|2|·6H|2|O}}) is a hydrated iron phosphate mineral found in a number of geological environments. As a secondary mineral it is typically formed from oxidizing and dehydrated vivianite. It was named by C. Ritz, Eric J. Essene, and Donald R. Peacor in 1974 for its structural relationship to vivianite.[3] See alsoReferences1. ^1 2 [https://www.mindat.org/min-2695.html Metavivianite] (Mindat.org)
2. ^1 Metavivianite Webmineral Data
}}{{phosphate-mineral-stub}} 4 : Phosphate minerals|Hydrates|Iron minerals|Triclinic minerals |