SCAPOLITE Gallery Return to Scapolite page. Click on image for larger view | |
Scapolite is a mineral group name. Members include the species meionite and marialite. When the exact species is undetermined, the group name scapolite is applied. | |
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Species: "SCAPOLITE" - microcline pseudomorph after scapolite Locality: Joppa Hill, Bedford, NH Specimen Size: 12 mm prismatic crystal section with attached grossular crystals Field Collected: Tom Mortimer Catalog No.: 512 Notes: |
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Species: SCAPOLITE Locality: Joppa Hill, Bedford, NH Specimen Size: 3.5 mm terminated crystal. Second view shows overall 3.5 cm specimen, small scapolite crystal at top. Field Collected: Tom Mortimer - 1990 Catalog No.: 734 Notes: Tetragonal symmetry evident when viewed down "C" axis. EDS analysis of "Scapolite" from Joppa Hill has been determined to be K feldspar pseudomorph after scapolite. This small crystal appears to be unaltered, so may possibly be scapolite. This specimen is cataloged as a pargasite specimen, because that is the prominant species present, (the green-black blades). A November, 2017 polished grain EDS analysis (BC223A) confirmed the scapolite group member, meionite. [tm] This is the first confirmed NH meionite I am aware of. Ideal meionite chemistry is: Ca4Al6Si6O24CO3 The calcium dominant scapolite member. Ideal marialite chemistry is: Na4Al3Si9O24Cl The sodium dominant scapolite member. Chemistry from this BC223A analysis: Ca3.92Na0.76Al6Cl0.09Si8.47O35.3 , normalized for 6 Al. A second probed grain spot gave: Ca3.74Na0.92Al6Si8.07O32.3 , normalized for 6 Al. |
Species: SCAPOLITE (pseudomorph) Locality: Joppa Hill, Bedford, NH Specimen Size: 4.5 cm field of view. Tetragonal prisms of scapolite pseudomorph on matrix. Field Collected: Tom Mortimer - 1990 Catalog No.: 735 Notes: |
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Species: SCAPOLITE (pseudomorph) Locality: Joppa Hill, Bedford, NH Specimen Size: 4.7 cm specimen. Tetragonal scapolite pseudomorph with pargasite blades. Field Collected: Tom Mortimer - 1990 Catalog No.: 737 Notes: This appears to be a chrorite pseudomorph after scapolite. |
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Species: SCAPOLITE - pseudomorph with Titanite Locality: Joppa Hill, Bedford, NH Specimen Size: 4 cm specimen, scapolite prisms center. Zoom view shows couple dozen 1 to 3 mm titanite crystals on the scapolite. Field Collected: Tom Mortimer - 1990 Catalog No.: TBC Notes: |
Species: SCAPOLITE (pseudomorph) Locality: Joppa Hill, Bedford, NH Specimen Size: 6 cm specimen with 3.8 x 2 cm scapolite/pseudomorph prism. Field Collected: Tom Mortimer - 1990 Catalog No.: 1557 Notes: This is the largest scapolite/pseudomorph specimen that I found. Calcite, vesuvianite and grossular are also present on this specimen. A sample grain from this specimen provided the source for one of the EDS analyses of this material that indicated a K spar pseudomorph. |
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Species: MARIALITE Locality: Twin Mtn. Quarry, Carroll, NH Specimen Size: Full specimen, 5.5 cm Field Collected: Bob Wilken Catalog No.: 2019 Notes: Marialite (Scapolite group) identification by EDS analysis (BC103) . (The Br is likely an assignment error by the EDS element peak association software.) The analysis showed this sample is sodium dominant, so on the marialite side of the of the meionite-marialite scapolite series. The APFU calculated from the analysis Atomic %'s gave: (Na2.0,Ca1.68,K0.24)Al3.64Si7O70Cl0.48 For reference: Meionite: Ca4Al6Si6O24CO3 Calcium dominant end member. Marialite: Na4Al3Si9O24Cl Sodium dominant end member. Scapolite group: (Ca,Na)4[Al3Si9]O24Cl |
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Species: MEIONITE (Scapolite Group) Locality: Road cut near the Manchester Armory site, Manchester, NH Specimen Size: 5 cm specimen. Cream colored scapolite prisms in quartz. Field Collected: Unknown Catalog No.: 2037 Notes: This is a Phillip Morrill listed locality. A skarn was uncovered during work on a road cut near the Manchester Armory, 1939. The find (made by a Manchester high school student) was reported in the 1939 issue of Rocks and Minerals , pg. 349. This specimen was salvaged by Dana Morong from the UNH mineral collection "de-acquisition." This is only the third specimen I [tm] have seen from this site. The other two are in the Woodman Institute, Dover, NH, collection. As of 2017, these are the best examples of NH scapolite. The number on specimen matches the number on label. The scapolite fluoresces rose color in SW UV (2nd photo) and pale-mustard-yellow in LW UV. A May 2017 EDS analysis , (BC200) gave an APFU of: (Ca3.10,Na0.89)Al3.60Si4.86O17 , so definitely the calcium dominant scapolite, Meionite. |
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