Epidote

URI: https://gptkb.org/entity/Epidote
GPTKB entity
AI-created image of Epidote
AI-created image
Statements (50)
Predicate Object
gptkbp:instanceOf gptkb:granite
gptkbp:associatedMinerals gptkb:chlorite
gptkb:calcite
gptkb:albite
quartz
gptkbp:birefringence 0.010–0.046
gptkbp:category sorosilicate mineral
gptkbp:chemicalFormula Ca2(Al,Fe)3(SiO4)3(OH)
gptkbp:cleavage perfect on [001]
gptkbp:color green
yellow-green
pistachio-green
gptkbp:crystalSystem monoclinic
gptkbp:diaphaneity transparent to translucent
gptkbp:discoveredBy gptkb:René_Just_Haüy
gptkbp:discoveredIn 1801
gptkbp:event metamorphic rocks
hydrothermal veins
gptkbp:foundIn gptkb:Austria
gptkb:Italy
gptkb:Norway
gptkb:Pakistan
gptkb:Russia
gptkb:Switzerland
gptkb:United_States
gptkbp:fracture uneven
gptkbp:habit prismatic crystals
massive
granular
gptkbp:hardnessMohs 6–7
gptkbp:IMA_symbol Epd
gptkbp:luster vitreous
gptkbp:namedAfter Greek word 'epidosis' (increase)
gptkbp:opticalProperties biaxial (+)
gptkbp:pleochroism strong
gptkbp:refractiveIndex nα = 1.729–1.751
nβ = 1.750–1.773
nγ = 1.759–1.797
gptkbp:relatedGroup gptkb:epidote_group
gptkbp:specificGravity 3.3–3.5
gptkbp:streak grayish white
gptkbp:symmetry P21/m
gptkbp:tenacity brittle
gptkbp:transparency translucent
transparent
gptkbp:uses gptkb:granite
collector's mineral
gptkbp:bfsParent gptkb:Grossular_garnet
gptkbp:bfsLayer 5
https://www.w3.org/2000/01/rdf-schema#label Epidote