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Aragonite Collection Image, Figure 1, Total 20 Figures

Aragonite Collection Image, Figure 2, Total 20 Figures

Aragonite Collection Image, Figure 3, Total 20 Figures

Aragonite Collection Image, Figure 4, Total 20 Figures

Aragonite Collection Image, Figure 5, Total 20 Figures

Aragonite Collection Image, Figure 6, Total 20 Figures

Aragonite Collection Image, Figure 7, Total 20 Figures

Aragonite Collection Image, Figure 8, Total 20 Figures

Aragonite Collection Image, Figure 9, Total 20 Figures

Aragonite Collection Image, Figure 10, Total 20 Figures

Aragonite Collection Image, Figure 11, Total 20 Figures

Aragonite Collection Image, Figure 12, Total 20 Figures

Aragonite Collection Image, Figure 13, Total 20 Figures

Aragonite Collection Image, Figure 14, Total 20 Figures

Aragonite Collection Image, Figure 15, Total 20 Figures

Aragonite Collection Image, Figure 16, Total 20 Figures

Aragonite Collection Image, Figure 17, Total 20 Figures

Aragonite Collection Image, Figure 18, Total 20 Figures

Aragonite Collection Image, Figure 19, Total 20 Figures

Aragonite Collection Image, Figure 20, Total 20 Figures

Aragonite Collection Image, Figure 1, Total 20 Figures

Aragonite Collection Image, Figure 2, Total 20 Figures

Aragonite Collection Image, Figure 3, Total 20 Figures

Aragonite Collection Image, Figure 4, Total 20 Figures

Aragonite Collection Image, Figure 5, Total 20 Figures

Aragonite Collection Image, Figure 6, Total 20 Figures

Aragonite Collection Image, Figure 7, Total 20 Figures

Aragonite Collection Image, Figure 8, Total 20 Figures

Aragonite Collection Image, Figure 9, Total 20 Figures

Aragonite Collection Image, Figure 10, Total 20 Figures

Aragonite Collection Image, Figure 11, Total 20 Figures

Aragonite Collection Image, Figure 12, Total 20 Figures

Aragonite Collection Image, Figure 13, Total 20 Figures

Aragonite Collection Image, Figure 14, Total 20 Figures

Aragonite Collection Image, Figure 15, Total 20 Figures

Aragonite Collection Image, Figure 16, Total 20 Figures

Aragonite Collection Image, Figure 17, Total 20 Figures

Aragonite Collection Image, Figure 18, Total 20 Figures

Aragonite Collection Image, Figure 19, Total 20 Figures

Aragonite Collection Image, Figure 20, Total 20 Figures

Aragonite

3D Link

reservation_info
- serial_no2:M04-086
- title_en:Aragonite
- amount:1
gdesc_info
- GDESC:　　標本M04-086為霰石，化學成分為CaCO3，屬碳酸鹽類礦物，與方解石屬於同質異構物，但霰石通常較方解石的密度還高。其英文Aragonite一詞源自西班牙地名Molina de Aragón村，常誤植為Aragón省。
  　　霰石結晶屬於斜方晶系，於物理特性上，比重約2.95，莫氏硬度介於3.5至4，解理發展良好且具有脆性，斷口多呈次貝殼狀，霰石之條痕為無色至白色，結晶介於透明至半透明，並呈現玻璃光澤，色彩多呈無色透明、白色或淺黃色，可能具有螢光或磷光特性，但不具磁性及放射性。化學性質與方解石相近，於化學上不耐酸性腐蝕，而於味覺、嗅覺及觸覺上並無明顯特徵。
  　　霰石於地表環境下較方解石少見且較不穩定，會隨時間經過逐漸轉變為方解石，霰石同樣主要藉化學沉澱作用或岩脈中熱液形成結晶，但形成溫度等條件與方解石較為不同，霰石經常形成雙晶，結晶良好者呈現稜柱狀、錐狀或細棒狀/針狀集合體，有時亦可能形成珍珠樣貌之層狀包覆體，事實上包含珍珠在內的許多生物殼層皆由霰石所構成。臺灣之霰石主要產於澎湖群島上玄武岩層的孔洞當中，部分霰石與褐鐵礦等礦物形成良好的花紋，成為具有珠寶飾品價值的"澎湖文石"。
  　　除前述提及之珠寶或飾品用途，近年亦有將霰石用於污染整治領域之研究。
  　　本標本由日本人岡本要八郎所收集，其原產地不詳，標本長寬約26 x 12公分，霰石以充填礦物的形式形成於灰色岩石的孔洞當中，顏色為白色至淺黃色，結晶透明至半透明並帶有玻璃光澤，具有明顯之同心圓構造但難以觀察到良好之結晶外形。

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