About: dbkwik:resource/_1Bp8WOpdbQC6lsqHzB4ow==   Sponge Permalink

An Entity of Type : dbkwik:resource/6IIoeMLPkySiK--1vpcViQ==, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

AttributesValues
rdf:type
rdfs:label
  • Esperite
rdfs:comment
  • The mineral was named in honor of Esper F. Larsen Jr. (1879-1961), petrologist of Harvard University.
sameAs
dcterms:subject
dbkwik:ceramica/pr...iPageUsesTemplate
Category
opticalprop
  • Biaxial , 2V measured: 5° to 40°
mohs
  • 5(xsd:integer)
Other
  • Brilliant yellow fluorescence under SW UV; kelly green cathodoluminescence.
Gravity
  • 428(xsd:integer)
Name
  • Esperite
Caption
  • Esperite under ultraviolet light
streak
  • White
formula
  • PbCa3Zn44
System
  • Monoclinic - Prismatic
Color
  • White
cleavage
  • Distinct on [010] and [100] - poor on [101]
habit
  • Typically massive
diaphaneity
  • Subtranslucent to opaque
fracture
  • Conchoidal, brittle
refractive
  • nα = 1.762 nβ = 1.770 nγ = 1.774
luster
  • Vitreous
birefringence
  • Max δ = 0.012
abstract
  • The mineral was named in honor of Esper F. Larsen Jr. (1879-1961), petrologist of Harvard University.
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