Epidote is an abundant rock-forming mineral, but one of secondary origin. It occurs in marble and schistose rocks of metamorphic origin. It is also a product of hydrothermal alteration of various minerals (feldspars, micas, pyroxenes, amphiboles, garnets, and others) composing igneous rocks.A rock composed of quartz and epidote is known as epidosite.Well-developed crystals are found at many ...
Epidote forms a group of related minerals, with the mineral Epidote being the most prominent member of the group. Two uncommon members of the Epidote group are Epidote-(Pb) (which is more popularly known as Hancockite), and Epidote-(Sr).
Epidote-(Sr) Crystallography: Axial Ratios: a:b:c =1.5793:1:1.8125 : Cell Dimensions: a = 8.925, b = 5.651, c = 10.243, Z = 2; beta = 114.45° V = 470.28 Den(Calc)= 3.75
Epidote-(Sr) Minakawa T, Fukushima H, Nishio-Hamane D, Miura H (2008) Epidote-(Sr), CaSrAl2Fe(Si2O7)(SiO4)(OH), a new mineral from the Ananai mine, Kochi Prefecture, Japan Journal of Mineralogical and Petrological Sciences 103 400-406
Epidote in Rocks. Epidote is a rock-forming mineral.Many regionally metamorphosed rocks contain small amounts of epidote. Two rock types that contain significant amounts of epidote are epidosite and unakite.Locations where these rocks can be found are rare, but at those locations significant amounts of these rocks can be present.
General Epidote-(Sr) Information : Chemical Formula: CaSrAl2Fe+++(Si2O7)(SiO4)O(OH) Composition: Molecular Weight = 530.76 gm Strontium 16.51 % Sr 19.52 % SrO: Calcium 7.55 % Ca 10.57 % CaO: Aluminum 10.17 % Al 19.21 % Al 2 O 3: Iron 10.52 % Fe 15.04 % Fe 2 O 3: Silicon 15.87 % Si 33.96 % SiO 2: Hydrogen 0.19 % H 1.70 % H 2 O ...
Epidote-(Sr) occurs as prismatic crystals (up to 1 cm in length) in tinzenite veins at the Nagakawara deposit and as fine crystal aggregates in piemontite breccia at the Hohnomori deposit. The Ananai Mine deposits are lenticular bodies in a red metachert and a basaltic rock comprised of albite, hematite, andradite, aegirine, actinolite ...
58.02.01a.11 Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 2 1 /m 2/m : Strunz Class: 09.BG.05a 09 - SILICATES (Germanates) 09.B - Sorosilicates : 09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups; 09.BG.05a Clinozoisite Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 2 1 /m 2/m : 09.BG.05a Epidote Ca2(Fe,Al)3 ...
Sr 0.90)Σ=2.00 (Al 1.92 Fe 3+ 0.87 Mn 3+ 0.20)Σ=2.99 Si 3.01 O 12 (OH). Mineral Group: Epidote group, clinozoizite subgroup. Occurrence: A late-stage hydrothermal vein mineral in a tinzenite deposit in metachert (Nagakawara deposit) and in piemontite breccias (Hohnomori deposit). Association: Calcite, tinzenite, piemontite-(Sr).
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