Esperite
Esperite is a rare complex calcium lead zinc silicate (PbCa3Zn4(SiO4)4) related to beryllonite and that used to be called calcium larsenite. It was named in honor of (1879–1961), petrologist of Harvard University. Esperite has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light. It is found in association with calcite, franklinite, willemite, hardystonite and clinohedrite. It has also been found as prismatic crystals up to 1 mm in length at the , Potosi, Bolivia in association with allophane, , and barite.
primaryTopic
Esperite
Esperite is a rare complex calcium lead zinc silicate (PbCa3Zn4(SiO4)4) related to beryllonite and that used to be called calcium larsenite. It was named in honor of (1879–1961), petrologist of Harvard University. Esperite has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light. It is found in association with calcite, franklinite, willemite, hardystonite and clinohedrite. It has also been found as prismatic crystals up to 1 mm in length at the , Potosi, Bolivia in association with allophane, , and barite.
has abstract
Esperita (PbCa3Zn4(SiO4)4) ber ...... fluoreszente batzuekin batera.
@eu
Esperite is a rare complex cal ...... with allophane, , and barite.
@en
Het mineraal esperiet is een l ...... behoort tot de nesosilicaten.
@nl
L'esperita és un mineral de pl ...... itat de minerals fluorescents.
@ca
La esperita es un mineral de l ...... e ninguna utilidad industrial.
@es
La esperite è un minerale.
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birefringence
Max δ = 0.012
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caption
Esperite under ultraviolet light
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category
class
Prismatic
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cleavage
Distinct on [010] and [100] - poor on [101]
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color
White
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date
February 2018
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diaphaneity
Subtranslucent to opaque
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formula
PbCa3Zn44
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fracture
Conchoidal, brittle
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gravity
habit
Typically massive
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luster
Vitreous
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name
Esperite
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opticalprop
Biaxial , 2V measured: 5° to 40°
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Other
Brilliant yellow fluorescence under SW UV; kelly green cathodoluminescence.
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reason
Is his middle initial F or S? ...... ppropriate Wiktionary articles
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refractive
nα = 1.762 nβ = 1.770 nγ = 1.774
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streak
White
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symmetry
P21/m
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text
It was named in honor of Esper F. Larsen Jr. , petrologist of Harvard University.
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wikiPageUsesTemplate
wordnet_type
subject
hypernym
comment
Esperita (PbCa3Zn4(SiO4)4) ber ...... fluoreszente batzuekin batera.
@eu
Esperite is a rare complex cal ...... with allophane, , and barite.
@en
Het mineraal esperiet is een l ...... behoort tot de nesosilicaten.
@nl
L'esperita és un mineral de pl ...... itat de minerals fluorescents.
@ca
La esperita es un mineral de l ...... e ninguna utilidad industrial.
@es
La esperite è un minerale.
@it
label
Esperiet
@nl
Esperita
@ca
Esperita
@es
Esperita
@eu
Esperite
@en
Esperite
@it
wasDerivedFrom
isPrimaryTopicOf
name
Esperite
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