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  2. Calcium oxalate - Wikipedia

    en.wikipedia.org/wiki/Calcium_oxalate

    Scanning electron micrograph of the surface of a kidney stone showing tetragonal crystals of Weddellite (calcium oxalate dihydrate) emerging from the amorphous central part of the stone (the horizontal length of the picture represents 0.5 mm of the figured original)

  3. Weddellite - Wikipedia

    en.wikipedia.org/wiki/Weddellite

    Weddellite, or calcium oxalate dihydrate, crystallises in a tetragonal system: the classic crystal shape is the eight-face bipyramid. Using bright field microscopy, the weddellite crystals are recognised easily by their shape, reminiscent of a postal envelope. More complex shapes of weddellite are possible; the dumbbell shape is not rare and ...

  4. Whewellite - Wikipedia

    en.wikipedia.org/wiki/Whewellite

    Whewellite / ˈ h juː ə l aɪ t / is a mineral, hydrated calcium oxalate, formula Ca C 2 O 4 ·H 2 O. [6] Because of its organic content it is thought to have an indirect biological origin; this hypothesis is supported by its presence in coal and sedimentary nodules. However, it has also been found in hydrothermal deposits where a biological ...

  5. Kidney stone disease - Wikipedia

    en.wikipedia.org/wiki/Kidney_stone_disease

    Scanning electron micrograph of the surface of a kidney stone showing tetragonal crystals of weddellite (calcium oxalate dihydrate) emerging from the amorphous central part of the stone (the horizontal length of the picture represents 0.5 mm of the figured original) Multiple kidney stones composed of uric acid and a small amount of calcium ...

  6. Oxalate - Wikipedia

    en.wikipedia.org/wiki/Oxalate

    Scanning electron micrograph of the surface of a kidney stone showing tetragonal crystals of weddellite (calcium oxalate dihydrate) emerging from the amorphous central part of the stone; the horizontal length of the picture represents 0.5 mm of the figured original.

  7. Calculus (medicine) - Wikipedia

    en.wikipedia.org/wiki/Calculus_(medicine)

    In kidney stones, calcium oxalate is the most common mineral type (see nephrolithiasis). Uric acid is the second most common mineral type, but an in vitro study showed uric acid stones and crystals can promote the formation of calcium oxalate stones. [1]

  8. Bladder stone (animal) - Wikipedia

    en.wikipedia.org/wiki/Bladder_stone_(animal)

    Two types naturally occur, calcium oxalate monohydrate, or whewellite (CaC 2 O 4 ·H 2 O), and calcium oxalate dihydrate, or weddellite (CaC 2 O 4 ·2H 2 O). Their appearance can be rough, smooth, spiculated (needle-like), or jackstone. Calcium oxalate stones form more readily in animals with hypercalcaemia, which can be caused by Addison's ...

  9. Nephrocalcinosis - Wikipedia

    en.wikipedia.org/wiki/Nephrocalcinosis

    The term nephrocalcinosis is used to describe the deposition of both calcium oxalate and calcium phosphate. [1] It may cause acute kidney injury. It is now more commonly used to describe diffuse, fine, renal parenchymal calcification in radiology. [2] It is caused by multiple different conditions and is determined by progressive kidney dysfunction.

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